List of scientific publications

1. J Ma, EEA Burgers, A Kok, R Goselink, TJGM Lam, B Kemp and ATM van Knegsel. Consequences of extending the voluntary waiting period for insemination on reproductive performance in dairy cows. Animal Reproduction Science, 2022, 244, 107046.
2. KD McCubbin, E de Jong, TJGM Lam, DF Kelton, JR Middleton, S McDougall, S De Vliegher, S Godden, PJ Rajala-Schultz, S Rowe, DC Speksnijder, JP Kastelic and HW Barkema Invited Review: Selective use of antimicrobials in dairy cattle at drying off. Journal of Dairy Science, 2022, 105, 7161-7181.
3. SHW Tijs, MMC Holstege, CGM Scherpenzeel, IMGA Santman-Berends, AGJ Velthuis and TJGM Lam. Effect of selective dry cow treatment on udder health and antimicrobial usage on Dutch dairy farms. Journal of Dairy Science, 2022, 105, 5381-5392.
4. M Tree, S McDougall, DS Beggs, ID Robertson, TJGM Lam and JW Aleri. Antimicrobial use on Australian dairy cattle farms – A survey of veterinarians. Preventive Veterinary Medicine, 2022, 202, 105610.
5. CE Exel, T Halasa, G Koop, W Steeneveld, TJGM Lam, L Benedictus, M Gussmann. A stochastic modelling approach to determine the effect of diverse Staphylococcus aureus strains on the economic and epidemiological outcomes of mastitis intervention strategies in dairy cattle. Preventive Veterinary Medicine, 2022, 199, 105566.
6. Z Deng, G Koop, H Hogeveen, EAJ Fischer, BHP van den Borne, R van der Tol and TJGM Lam. Transmission dynamics of Staphylococcus aureus and Streptococcus agalactiae in a Dutch dairy herd using an automatic milking system. Preventive Veterinary Medicine, 2021, 192, 105384
7. K Griffioen, AGJ Veldhuis, G Koop and TJGM Lam. Effects of a mastitis treatment strategy with or without on-farm testing. Journal of Dairy Science, 2021, 104, 4665-4681.8.
8. LWJH van den Crommenacker-Konings, P van Dam, R Everts, A Shittu, M Nielen, TJGM Lam and G Koop. Dynamics of intramammary infections in suckler ewes during early lactation. Journal of Dairy Science, 2021, 104, 5979-5987.
9. IMGA Santman-Berends, KWH van den Heuvel, TJGM Lam, CGM Scherpenzeel, G van Schaik. Monitoring udder health on routinely collected census data: evaluating the short to mid-term consequences of implementing selective dry cow treatment. Journal of Dairy Science, 2020, 104, 2280-2289.
10. J Hoekstra, AL Zomer, VPMG Rutten, L Benedictus, JA Stegeman, MP Spaninks, TW Bennedsgaard, A Biggs, S De Vliegher, DH Mateo, R Huber-Schlenstedt, J Katholm, P Kovács, V Krömker, G Lequeux, P Moroni, L Pinho, S Smulski, K Supré, JM Swinkels, MA Holmes, TJGM Lam and G Koop. Genomic analysis of European bovine Staphylococcus aureus from clinical versus subclinical mastitis. Scientific Reports, 2020, 10:18172. https://doi.org/10.1038/s41598-020-75179-2
    
11. TJGM Lam, AE Heuvelink, MA Gonggrijp and IMGA Santman-Berends. Antimicrobial use in dairy cattle in the Netherlands. Journal of Animal Science, 2020, 98, S9-S14, Doi:10.1093/jas/skaa143
    
12. J Ma, RJ van Hoeij, RM Bruckmaier, A Kok, TJGM Lam, B Kemp and ATM van Knegsel. Consequences of transition treatments on fertility and associated metabolic status for dairy cows in early lactation. Animals, 2020, 10, 6.
    
13. AA Schwendner, TJGM Lam, M Bodmer, M-E Cousin, G. Schupbach-Regula and BHP van den Borne. Knowledge, attitude and practices of Swiss dairy farmers towards intramammary antimicrobial use and antimicrobial resistance: A latent class Analysis. Preventive Veterinary Medicine, 2020, 179, 105023.
    
14. Z Deng, TJGM Lam, H Hogeveen, M Spaninks, N Heij, M Postema, T van Werven and G Koop. Antimicrobial use and farmers' attitude toward mastitis treatment on dairy farms with automatic or conventional milking systems. Journal of Dairy Science. 2020, 103, 7302-7314.
    
15. Z Deng, H Hogeveen, TJGM Lam, R van der Tol and G Koop G. Performance of Online Somatic Cell Count Estimation in Automatic Milking Systems. Frontiers in Veterinary Science. 2020; 7: 221. doi: 10.3389/fvets.2020.00221.
    
16. J Hoekstra, VPMG Rutten, TJGM Lam, KPM van Kessel, MP Spaninks, JA Stegeman, L Benedictus and G Koop. Activation of a bovine mammary cell line by ruminant-associated Staphylococcus aureus is lineage dependent. Microorganisms. 2019,7,688, doi:10.3390/mocroorganisms7120688
    
17. L van Duijn, AMB Veldhuis, MH Mars, B de Roo and TJGM Lam. Efficacy of a voluntary BVDV control programme: Experiences from the Netherlands. Veterinary Journal. 2019, 245’55-60.
    
18. AE Heuvelink, MA Gonggrijp, RGJ Buter, CC ter Bogt-Kappert, G van Schaik, AGJ Velthuis and TJGM Lam. Prevalence of extended-spectrum and AmpC β-lactamase-producing Escherichia coli in Dutch dairy herds. Veterinary Microbiology. 2019; 232: 58-64.
    
19. SA Mekonnen, G Koop, AM Getaneh, TJGM Lam and H Hogeveen. Failure costs associated with mastitis in smallholder dairy keeping Holstein Friesian x Zebu crossbreed cows. Animal 2019 doi: 10.1017/S175173111900082X
    
20. BHP van den Borne, G van Schaik, TJGM Lam, M Nielen and K Frankena. Intramammary antimicrobial treatment of subclinical mastitis and cow performance later in lactation. Journal of Dairy Science. 2019;102:4441-4451
    
21. Z Deng, G Koop, TJGM Lam, IA van der Lans, JCM Vernooij and H Hogeveen. Farm-level risk factors for bovine mastitis in Dutch automatic milking dairy herds. Journal of Dairy Science. 2019, 102, 4522-4535.
    
22. MMC Holstege, AJG. de Bont-Smolenaars, IMGA. Santman-Berends, GM. van der Linde-Witteveen, G van Schaik, AGJ Velthuis and TJGM Lam. Factors associated with high antimicrobial use in young calves at Dutch dairy farms: a case-control study. Journal of Dairy Science. 2018, 101, 9259-9265.
    
23. K Griffioen, AGJ Velthuis , LA Lagerwerf, AE Heuvelink and TJGM Lam. Agreement between four commercial diagnostic tests and routine bacteriological culture of milk to determine the udder infection status of dairy cows. Preventive Veterinary Medicine. 2018;157:162-173.
    
24. CGM Scherpenzeel, IMGA Santman-Berends and TJGM Lam. Veterinarians’ attitudes towards antimicrobial use and selective dry cow treatment in the Netherlands. Journal of Dairy Science. 2018, 101, 6336-6345.
    
25. RJ van Hoeij, TJGM Lam, RM Bruckmaier, J Dijkstra, GJ Remmelink, B Kemp and ATM van Knegsel. Udder health of dairy cows fed different dietary energy levels after a short or no dry period without use of dry cow antibiotics. Journal of Dairy Science. 2018, 101, 4570-4585.
26. A Dorado-García, JH Smid, W van Pelt, MJM Bonten, AC Fluit, G van den Bunt, JA Wagenaar, J Hordijk, CM Dierikx, KT Veldman, A de Koeijer, W Dohmen, H Schmitt, A  Liakopoulos, E Pacholewicz, TJGM Lam, AGJ Velthuis, AE Heuvelink, MA Gonggrijp, E an Duijkeren, AHAM van Hoek AM de Roda Husman, A, Blaak, AH Havelaar, DJ Mevius, DJJ Heederik. Molecular relatedness of ESBL/AmpC-producing Escherichia coli from humans, animals, food and the environment: a pooled analysis. Journal of Antimicrobial Chemotherapy, 2018, 73, 339–347.
27. CGM Scherpenzeel, H Hogeveen, L Maas and TJGM Lam. Economic optimization of selective dry cow treatment. Journal of Dairy Science, 2018, 101, 1530-1539.
28. TJGM Lam, RJ Wessels and J Jansen. The RESET Mindset Model applied on decreasing antibiotic usage in dairy cattle in the Netherlands. Irish Veterinary Journal, 2017, 70, 5.
29. SA Mekonnen, G Koop, ST Melkie, CD Getahun, H Hogeveen and TJGM Lam. Prevalence of subclinical mastitis and associated risk factors at cow and herd level in dairy farms in North-West Ethiopia. Preventive Veterinary Medicine, 2017, 145, 23-31.
30. C Ritter, J Jansen, S Roche, DF Kelton, CL Adams, K Orsel, RJ Erskine, G Benedictus, TJGM Lam and HW Barkema. Invited review: Determinants of farmers' adoption of management-based strategies for infectious disease prevention and control. Journal of Dairy Science, 2017, 100, 3329-3347.
31. IMGA Santman-Berends, MA Gonggrijp, JJ Hage, AE Heuvelink, AGJ Velthuis, TJGM Lam and G van Schaik. Prevalence and risk factors for extended-spectrum β-lactamase or AmpC-producing Escherichia coli in organic dairy herds in the Netherlands. Journal of Dairy Science, 2017, 100, 562-571.
32. SA Mekonnen, G Koop, TJGM Lam and H Hogeveen. The intention of North-Western Ethiopian dairy farmers to control mastitis. PLoS One. 2017, 12, 17 p., e0182727
33. MA Gonggrijp, IMGA Santman-Berends, AE Heuvelink, GJ Buter, G van Schaik, JJ Hage and TJGM Lam. Prevalence and risk factors for extended-spectrum β-lactamase- and AmpC-producing Escherichia coli in dairy farms. Journal of Dairy Science, 2016, 99, 9001-9013.
34. CGM Scherpenzeel, SHW Tijs, IEM den Uijl, IMGA Santman-Berends, AGJ Velthuis, and TJGM Lam. Farmers' attitude toward the introduction of selective dry cow therapy. Journal of Dairy Science, 2016, 99, 8259-8266.
35. RJ van Hoeij, TJGM Lam, DB de Koning, W Steeneveld, B Kemp and ATM van Knegsel. Cow characteristics and their association with udder health after different dry period lengths. Journal of Dairy Science, 2016, 99, 8330-8340.
36. FJS van Soest, IMGA Santman-Berends, I.TJGM Lam and H Hogeveen. Failure and preventive costs of mastitis on Dutch dairy farms Journal of Dairy Science, 2016, 99,8365-8374.
37. K Griffioen, GE Hop, MMC Holstege, AGJ Velthuis and TJGM Lam. The1Health4Food–Dutch Mastitis Diagnostics Consortium. Dutch dairy farmers' need for microbiological mastitis diagnostics. Journal of Dairy Science, 2016, 99, 5551-5561.
38. IMGA Santman-Berends, JM Swinkels, TJGM Lam, J Keurentjes and G van Schaik. Evaluation of udder health parameters and risk factors for clinical mastitis in Dutch dairy herds in the context of a restricted antimicrobial usage policy. Journal of Dairy Science, 2016, 99, 2930-2939.
39. CGM Scherpenzeel, IEM den Uijl, G van Schaik, RGM Olde Riekerink, H Hogeveen and TJGM Lam. Impact on udder health, antimicrobial usage and economics of different scenarios for selective dry cow therapy. Journal of Dairy Science, 2016, 99, 3753-3763.
40. R Boss, A Cosandey, M Luini, K Artursson, M Bardiau, F Breitenwieser, E Hehenberger, T Lam, M Mansfeld, A Michel, G Mösslacher, J Naskova, S Nelson, O Podpečan, A Raemy, E Ryan, O Salat, P Zanger, A Steiner and HU Graber. Bovine Staphylococcus aureus: subtyping, evolution and zoonotic transfer. Journal of Dairy Science, 2016, 99, 515-528.
41. A Cosandey, R Boss, M Luini, K Artursson, M Bardiau, F Breitenwieser, E Hehenberger, T Lam, M Mansfeld, A Michel, G Mösslacher, J Naskova, S Nelson, O Podpečan, A Raemy, E Ryan, O Salat, P Zanger, A Steiner and HU Graber. Staphylococcus aureus genotype B and other genotypes isolated from cow milk in European countries. Journal of Dairy Science, 2016, 99, 529-540.
42. KA Hettinga, FAM de Bok and TJGM Lam. Short communication: Practical issues in implementing volatile metabolite analysis for identifying mastitis pathogens. Journal of Dairy Science, 2015, 98, 7906-7910.
43. HW Barkema, MAG von Keyserlingk, JP Kastelic, TJGM Lam, C Luby, J-P Roy, SJ LeBlanc, GP Keefe and DF Kelton, Invited review: Changes in the dairy industry affecting dairy cattle health and welfare. Journal of Dairy Science, 2015, 98, 7426-7445.
44. IMGA Santman-Berends, TJGM Lam, J Keurentjes and G van Schaik. An estimation of the clinical mastitis incidence per 100 cows per year based on routinely collected herd data. Journal of Dairy Science, 2015, 98, 6965-6977
45. JM Swinkels, A Hilkens, V Zoche-Golob, V Krömker, M Buddiger, J Jansen and TJGM Lam. Social influences on the duration of antibiotic treatment of clinical mastitis in dairy cows. Journal of Dairy Science, 2015, 98, 2369-2380.
46. JM Swinkels, V. Kromker and TJGM Lam. Efficacy of standard vs. extended intramammary cefquinome treatment of clinical mastitis in cows with persistent high somatic cell counts. Journal of Diary Research, 2014, 81, 424-433.
47. BHP van den Borne, J Jansen, TJGM Lam and G van Schaik Associations between the decrease in bovine clinical mastitis and changes in dairy farmers' attitude, knowledge, and behavior in the Netherlands. Research in Veterinary Science, 2014, 97, 226-229.
48. RGM Olde Riekerink, K van Amersfort, OC Sampimon, GA Hooijer and TJGM Lam. Short communication: Prevalence, risk factors and a field scoring system for udder cleft dermatitis in Dutch Dairy herds. Journal of Dairy Science, 2014, 97, 5007-5011.
49. B Brummelman, M Holzhauer, K Frankena and TJGM Lam. Prevalence of claw disorders in young FH calves with and without access to pasture. 1. Non-infectious disorders. Dutch Veterinary Journal, 2014, 139(7), 26-33.
50. M Holzhauer, DCK van Doorn, CJM Bartels, FHM Borgstede, MH Mars, A ten Wolthuis-Bronsvoort, L Moll and TJGM Lam. Deworming management en anthelminitic resistence in Ditch cattle herds. Dutch Veterinary Journal, 2014, 139, 27-35.
51. CGM Scherpenzeel, IEM den Uijl, G van Schaik, RGM Olde Riekerink, JM Keurentjes and TJGM Lam. Evaluation of the use of dry cow antibiotics in low somatic cell count cows. Journal of Dairy Science, 2014, 97, 3606-3614.
52. JM Swinkels, P Cox, YH Schukken and TJGM Lam. Efficacy of extended cefquinome treatment of clinical S. aureus mastitis. Journal of Dairy Science, 2013, 96, 4983-4992.
53. JM Swinkels, TJGM Lam, MJ Green and AJ Bradley. Effect of extended cefquinome treatment on clinical persistence or recurrence of environmental clinical mastitis. Veterinary Journal 2013, 197, 682-687.
54. TJGM Lam, BHP van den Borne, J Jansen, K Huijps, JCL van Veersen, G van Schaik and H Hogeveen. Improving bovine udder health: a national mastitis control program in the Netherlands. Journal of Dairy Science, 2013, 96, 1301-1311.
55. EM Harrison, GK Paterson, MT Holden, FJ Morgan, AR Larsen, A Petersen, S Leroy, S De Vliegher, V Perreten, LK Fox, TJGM Lam, OC Sampimon, RN Zadoks, SJ Peacock, J Parkhill and MA Holmes. A Staphylococcus xylosus isolate with a new mecC allotype. Antimicrobial Agents Chemotherapeutics, 2013, 57, 1524-1528.
56. A Feβler, RGM Olde Riekerink, A Rothkamp, K Kadlec, OC Sampimon, TJGM Lam and A Schwarz. Characterization of methicillin-resistant Staphylococcus aureus CC398 obtained from humans and animals on dairy farms. Veterinary Microbiology, 2012, 160, 77-84.
57. M Holzhauer, B Brummelman, K Frankena and TJGM Lam. A longitudinal study into the effect of grazing on claw disorders in female calves and young dairy cows. Veterinary  Journal, 2012, 193, 633-638.
58. M Holzhauer, CJ Bartels, C Bergsten, MMJ van Roiet, K Frankena and TJGM Lam. The effect of an acidified, ionized copper sulphate solution on digital dermatitis in dairy cows. Veterinary  Journal 2012, 193, 659-663.
59. J Jansen and TJGM Lam. The role of Communication in improving udder health. Veterinary Clinics of North America. Food Animal practice. 2012, 28, 363-379
60. M Tavakol, RGM Olde Riekerink, OC Sampimon, WJB van Wamel, A van Belkum and TJGM Lam. Bovine mastitis associated MRSA ST398 in the Netherlands. Acta Veterinaria Scandinavica 2012, 54, 28.
61. IMGA Santman-Berends, RGM Olde -Riekerink, OC Sampimon_, G van Schaik and TJGM Lam. Incidence of subclinical mastitis in Dutch dairy heifers in the first 100 days in lactation and associated risk factors Journal of Dairy Science, 2012, 95, 2476–2484.
62. HW Ploeger, PC Verbeek CWH Dekkers, E van Engelen, M Uiterwijk, TJGM Lam and M Holzhauer. The value of a bulk-tank milk ELISA and individual serological and faecal examination for diagnosing (sub)clinical Dictyocaulus viviparus infection in dairy cows. Veterinary Parasitology, 2012, 184, 168-179.
63. OC Sampimon, TJGM Lam, DJ Mevius, YH Schukken and RN Zadoks. Antimicrobial susceptibility of coagulase-negative staphylococci isolated from bovine milk samples. Veterinary Microbiology, 2011, 150, 173-179.
64. TCW Ploegaert, E Tijhaar, TJGM Lam, A Taverne-Thiele, JJ van der Poel, JAM van Arendonk, HFJ Savelkoul and HK Parmentier. Natural antibodies in bovine milk and blood plasma: variability among cows, repeatability within cows, and relation between milk and plasma titers. Veterinary Immunology and Immunopathology, 2011, 144, 88-94.
65. MB Melchior, MHJ van Osch, TJGM Lam, JCM Vernooij, W Gaastra and J Fink Gremmels. Extended biofilm susceptibility assay for Staphylococcus aureus bovine mastitis isolates; evidence for association between genetic make up and biofilm susceptibility. Journal of Dairy Science, 2011, 94, 5926-5937.
66. BHP van den Borne, H Vernooij, A. Msalale Lupindu, G van Schaik, K Frankena, TJGM Lam and M Nielen. Quantification of the relationship between high somatic cell counts and subsequent clinical mastitis in dairy cows with two analytical methods. Preventive Veterinary Medicine, 2011, 102, 265– 273.
67. M Holzhauer, CJM Bartels, C Vulders and TJGM Lam. The Curative Effect of topical treatment of Bovine Digital Dermatitis with Intra Hoof-Fit gel®. Veterinary Record, 2011, 168, 79, 10.1136/vr.d5513.
68. TJGM Lam, JCL van Veersen, OC Sampimon, RGM Olde Riekerink. On-farm udder health monitoring. Tierärztliche Praxis Großtiere, 2011, 2, 95-100.
69. J Muskens, E van Engelen, C van Maanen, C Bartels and TJGM Lam. The prevalence of Coxiella burnetii infection in Dutch dairy herds based on testing bulk tank milk and individual samples with PCR and ELISA. Veterinary Record, 2011, 168, 79, doi:10.1136/vr.c6106.
70. IMGA Santman-Berends, JJ Hage, TJGM Lam, OC Sampimon and G van Schaik. The effect of bluetongue virus serotype 8 on milk production and somatic cell count in Dutch dairy cattle in 2008. Journal of Dairy Science, 2011, 94, 1347-1354.
71. TJGM Lam, J Jansen, BHP van den Borne, RJ Renes and H Hogeveen. What veterinarians need to know to optimize their role as udder health advisors in dairy herds. New Zealand Veterinary Journal, 2011, 59, 8–15.
72. H Hogeveen, K Huijps and TJGM Lam. Motivating producers to improve udder health: Impact of economics. New Zealand Veterinary Journal, 2011, 59, 16-23.
73. MT Koskinen, GJ Wellenberg, OC Sampimon, J Holopainen, A Rothkamp, L Salmikivi, WA van Haeringen, TJGM Lam and S Pyörälä. Field comparison of real-time PCR and bacterial culturing for identification of bovine mastitis bacteria. Journal of dairy Science, 2010, 93, 5707-5747.
74. J Jansen, G van Schaik, RJ Renes and TJGM Lam. The effect of a national mastitis control. program on farmers’ attitudes, knowledge, and behavior in the Netherlands. Journal of Dairy Science, 2010, 93,5737-5747.
75. TCW Ploegaert, S. Wijga, E. Tijhaar, JJ van der Poel, TJGM Lam, HFJ Savelkoul, HK Parmentier and JAM van Arendonk. Genetic variation of natural antibodies in milk of Dutch Holstein-Friesian cows. Journal of Dairy Science, 2010, 93, 5467-5473.
76. K Huijps, H Hogeveen, G Antonides, N Valeeva, TJGM Lam and AGJM Oude Lansink. Suboptimal behaviour with respect to mastitis management. European Review of Agricultural Economics, 2010, 37, 553-568.
77. BHP van den Borne, G van Schaik, TJGM Lam and M Nielen. Variation in herd level mastitis indicators between primi- and multiparae in Dutch dairy herds. Preventive Veterinary Medicine, 2010, 96, 49-55.
78. OC Sampimon, BHP van den Borne, IMGA Santman-Berends, HW Barkema and  TJGM Lam. The effect of coagulase-negative staphylococci on somatic cell count in Dutch dairy herds. Journal of Dairy Research, 2010, 77, 318-324.
79. K Huijps, H Hogeveen, TJGM Lam and AGJM Oude Lansink. Costs and efficacy of management measures to improve udder health at Dutch dairy farms. Journal of Dairy Science, 2010, 93, 115-124.
80. BHP van den Borne, G van Schaik, TJGM Lam and M Nielen. Therapeutic effects of antimicrobial treatment during lactation of recently acquired bovine subclinical mastitis: two linked randomized field trials. Journal of Dairy Science, 2010, 93, 218-233.
81. J Jansen, RJ Renes and TJGM Lam. Evaluation of two communication strategies to improve udder health management. Journal of Dairy Science, 2010, 93, 604-612.
82. J Jansen, CDM Steuten, RJ Renes, MNC Aarts and TJGM Lam. Debunking the myth of the hard-to-reach farmer: effective communication on udder health. Journal of Dairy Science, 2010, 93, 1296-1306.
83. BHP van den Borne, M Nielen, G van Schaik, MB Melchior, TJGM Lam and RN Zadoks. Host-adaptation of bovine Staphylococcus aureus seems associated with bacteriological cure after lactational antimicrobial treatment. Journal of Dairy Science, 2010, 93, 2550-2558.
84. CJM Bartels, M Holzhauer, R Jorritsma, WAJM Swart and TJGM Lam. Prevalence, prediction and risk factors of enteropathogens in normal and non-normal faeces of  young Dutch dairy calves. Preventive Veterinary Medicine, 2010, 93, 162-169.
85. MAPM van Asseldonk, RJ Renes, TJGM Lam and H Hogeveen. Awareness and perceived value of economic information in controlling somatic cell count. Veterinary Record, 2010, 166, 263-267.
86. T Halasa, M Nielen, APW de Roos, R van Hoorne, G de Jong, TJGM Lam, T van Werven and H Hogeveen. Production loss due to new subclinical mastitis in Dutch dairy cows estimated with a test-day model. Journal of Dairy Science, 2009, 92, 599-606.
87. J ten Napel, Y de Haas, G de Jong, TJGM Lam, W Ouweltjes and JJ Windig. Characterisation of distributions of somatic cell counts. Journal of Dairy Science, 2009, 92, 1253-1264.
88. OC Sampimon, S De Vliegher, HW Barkema, J Sol and TJGM Lam. Effect of prepartum dry cow antibiotic treatment in dairy heifers on udder health and milk production. Journal of Dairy Science, 2009, 92, 4395-4403.
89. KA Hettinga, HJF van Valenberg, TJGM Lam and ACM van Hooydonk. The influence of incubation on the formation of volatile bacterial metabolites in mastitis milk. Journal of Dairy Science, 2009, 92, 4901-4905.
90. OC Sampimon, HW Barkema, IMGA Berends, J Sol and TJGM Lam. Prevalence and herd-level risk factors for intramammary infection with coagulase-negative staphylococci in Dutch dairy herds. Veterinary Microbiology, 2009, 134, 37-44.
91. K Huijps, S DeVliegher, TJGM Lam and H Hogeveen. Cost estimation of heifer mastitis in early lactation by stochastic modelling. Veterinary Microbiology, 2009, 134, 121-127.
92. OC Sampimon, RN Zadoks, S De Vliegher, K Supré, F Haesbrouck, HW Barkema, J Sol and TJGM Lam. Performance of API Staph ID 32 and Staph-Zym for identification of coagulase-negative staphylococci isolated from bovine samples. Veterinary Micobiology, 2009, 136, 300-305.
93. K Huijps, H Hogeveen, TJGM Lam and RBM Huirne. Preferences of cost factors for mastitis management among Dutch dairy farmers using adaptive conjoint analysis. Preventive Veterinary Medicine, 2009, 92, 351-359.
94. J Jansen, BHP van den Borne, RJ Renes, G van Schaik, TJGM Lam and C. Leeuwis. Explaining mastitis incidence in Dutch dairy farming: the influence of farmers’ attitudes and behavior. Preventive Veterinary Medicine, 2009, 92, 210-223.
95. OC Sampimon, HW Barkema, IMGA Berends, J Sol and TJGM Lam. Prevalence of intramammary infection in Dutch dairy herds. Journal of Dairy Research, 2009, 76, 129-136.
96. TJGM Lam, RGM Olde Riekerink, OC Sampimon and H Smith. Mastitis diagnostics and performance monitoring: a practical approach. Irish Veterinary Journal, 2009, 62 supplement, 34-39.
97. KA Hettinga, HJF van Valenberg, TJGM Lam and ACM van Hooijdonk. Detection of mastitis pathogens by analysis of volatile bacterial metabolites. Journal of Dairy Science, 2008, 91, 3834-3839.
98. W Ouweltjes, JJ Windig, G de Jong, TJGM Lam, J ten Napel and Y de Haas. The use of data from sampling for bacteriology for genetic selection against clinical mastitis. Journal of Dairy Science, 2008, 91, 4860-4870.
99. IMGA Berends, WAJM Swart, K Frankena, J Muskens, TJGM Lam and G van Schaik. The effect of becoming BVDV-free on fertility and udder health in Dutch dairy herds. Preventive Veterinary Medicine, 2008, 84, 48-60.
100. IMGA Berends, EAM Graat, WAJM Swart, MF Weber, AW van der Giessen, TJGM Lam, AE Heuvelink, HJ van Weering. Prevalence of VTEC O157 in dairy and veal herds and risk factors for veal herds. Preventive Veterinary Medicine, 2008, 87, 301-310.
101. Th Dijkstra, TJGM Lam, CJM Bartels, M Eysker and W Wouda. Natural postnatal Neospora caninum infection in cattle can persist and lead to endogenous transplacental infection. Veterinary Parasitology, 2008, 152, 220-225.
102. K Huijps, TJGM Lam and H Hogeveen. Costs of mastitis: facts and perception. Journal of Dairy Research, 2008, 75, 113-120.
103. RK Tolboom, JJ Snoep, OC Sampimon, J Sol and TJGM Lam. Mycoplama mastitis bij het rund. Dutch Veterinary Journal, 2008, 133, 96-101.
104. Y de Haas, G de Jong and TJGM Lam. Udderhealth: breeding. Dutch Veterinary Journal, 2008, 133, 464-468.
105. J Muskens, WAJM Swart, IMGA Berends, G van Schaik and T.J.G.M. Lam. Udderhealth: the effect of BVD. Dutch Veterinary Journal, 2008, 133, 562-565.
106. NI Valeeva, TJGM Lam and H Hogeveen. Motivation of Dairy farmers to improve mastitis management. Journal of Dairy Science, 2007, 90, 4466-4477.
107. RJ Bouwstra, T van Werven, P Dobbelaar and TJGM Lam. Udderhealth: vitamin E. Dutch Veterinary Journal, 2007, 132, 254-256.
108. H Smith, OC Sampimon and TJGM Lam. Udderhealth: Bacteriological diagnostics. Dutch Veterinary Journal, 2007, 132, 740-743.
109. LJ White, TJGM Lam, YH Schukken, LE Green, GF Medley and MJ Chappell. The transmission and control of mastitis in dairy cows: a theoretical approach. Preventive Veterinary Medicine, 2006, 85, 67-83.
110. F Neijenhuis, H. Wemmenhove and TJGM Lam. Udderhealth: milking and teat condition. Dutch Veterinary Journal, 2006, 131, 486-488.
111. LJ White, ND Evans, TJGM Lam, YH Schukken, GF Medley, KR Godfrey and MJ Chappell. The structural idenifiability and parameter estimation of a multispecies model for the transmission of mastitis in dairy cows with postmilking teat disinfection. Mathematical Biosciences, 2002, 174, 275-291.
112. LJ White, ND Evans, TJGM Lam, YH Schukken, GF Medley, KR Godfrey and MJ Chappell. The structural idenifiability and parameter estimation of a multispecies model for the transmission of mastitis in dairy cows. Mathematical Biosciences, 2001, 174, 77-90.
113. LJ White, YH Schukken, TJGM Lam, GF Medley and MJ Chappell. A multispecies model for the transmission and control of mastitis in dairy cows. Epidemiology and Infection, 2001,127, 567-576.
114. D Döpfer, R Almeida, TJGM Lam, H Nederbragt, SP Oliver and W Gaastra. Adhesion and invasion of Escherichia coli from single and recurrent clinical cases of bovine mastitis in vitro. Veterinary Microbiology, 2000, 74, 331-343.
115. D Döpfer, HW Barkema, TJGM Lam, YH Schukken and W Gaastra. Recurrent clinical mastitis caused by Escherichia coli in dairy cows. Journal of Dairy Science 1999, 82, 80-85.
116. HW Barkema, YH Schukken, TJGM Lam, ML Beiboer, G Benedictus and A Brand. Management practices associated with the incidence rate of clinical mastitis. Journal of Dairy Science, 1999, 82, 1643-1654.
117. HW Barkema, JD van der Ploeg, YH Schukken, TJGM Lam, G Benedictus and A Brand. Management style and its association with bulk milk somatic cell count and incidence rate of clinical mastitis. Journal of Dairy Science, 1999, 82, 1655-1663.
118. HW Barkema, HA DeLuyker, YH Schukken and TJGM Lam. Quarter milk somatic cell count at calving and at the first six milkings after calving. Preventive Veterinary Medicine,1999, 38, 1-9.
119. HW Barkema, YH Schukken, TJGM Lam, ML Beiboer, H Wilmink, G Benedictus and A Brand. Incidence of clinical mastitis in dairy herds grouped in three categories by bulk milk somatic cell count cohorts. Journal of Dairy Science, 1998, 81, 411-419.
120. HW Barkema, YH Schukken, TJGM Lam, ML Beiboer, H Wilmink, G Benedictus and A Brand. Management practices associated with low, mid, and high bulk milk somatic cell count. Journal of Dairy Science, 1998, 81, 1917-1929.
121. HW Barkema, J van der Schans, YH Schukken, ALW de Gee, TJGM Lam and G Benedictus. Effect of freezing of quarter milk samples on somatic cell count as determined by the fossomatic. Journal of Dairy Science, 1997, 80, 422-426.
122. HW Barkema, YH Schukken, TJGM Lam, DT Galligan, ML Beiboer and A Brand. Estimation of interdependence among quarters of the bovine udder with subclinical mastitis and implications for analysis. Journal of Dairy Science, 1997, 80, 1592-1599.
123. AJ Schepers, TJGM Lam, YH Schukken, JBM Wilmink and WJA Hanekamp. Estimation of variance components for somatic cell counts to determine thresholds for uninfected quarters. Journal of Dairy Science, 1997, 80, 1833-1840.
124. TJGM Lam, YH Schukken, JH van Vliet, FJ Grommers, MJM Tielen and A Brand. Effect of natural infection with minor pathogens on susceptibility to natural infection with major pathogens in the bovine mammary gland. American Journal of Veterinary Research, 1997, 58, 17-22.
125. J Poot, M Eysker and TJGM Lam. Variation in infection levels with gatrointestinal nematodes in first-year grazing calves in the Netherlands. Veterinary Parasitology, 1997, 68, 103-111.
126. M Eysker, FNJ Kooyman, JJ van Amerongen, WDJ Kremer and TJGM Lam. An attempt to control lungworm disease and parasitic gastroenteritis on commercial dairy farms by the use of an adaptation of Michel’s dose and move system. Veterinary Quarterly, 1997,19, 61-64.
127. TJGM Lam, JH van Vliet, YH Schukken, FJ Grommers, A van Velden-Russcher, HW Barkema and A Brand. The effect of discontinuation of postmilking teat disinfection in low somatic cell count herds. I. The incidence of clinical mastitis. Veterinary Quarterly, 1997, 19, 41-47.
128. TJGM Lam, JH van Vliet, YH Schukken, FJ Grommers, A van Velden-Russcher, HW Barkema and A Brand. The effect of discontinuation of postmilking teat disinfection in low somatic cell count herds. II. Dynamics of intramammary infections. Veterinary Quarterly, 1997,19, 47-53.
129. CJAM de Koning, JDHM Miltenburg, JH van Vliet and TJGM Lam. A closer look at the milking machine. Dutch Veterinary Journal, 1997,122, 532-540.
130. JDHM Miltenburg, CJAM de Koning, JH van Vliet and TJGM Lam. Milking and udder health: a literature review. Dutch Veterinary Journal, 1997, 122, 568-576.
131. TJGM Lam, MCM de Jong, YH Schukken and A Brand. Mathematical modeling to estimate efficacy of postmilking teat disinfection in dairy cows. Journal of Dairy Science, 1996, 79, 62-70.
132. LJA Lipman, A de Nijs, TJGM Lam, JA Rost, L van Dijk, YH Schukken and W Gaastra. Genotyping by PCR, of Staphylococcus aureus strains, isolated from mammary glands of cows. Veterinary Microbiology, 1996, 48, 51-55.
133. M Eysker, JH Boersema, FNJ Kooyman, TJGM Lam, J Poot, T Schieder and T van Werven. Comparison between fenbendazole and moxidectin applied in a dose and move system for the control of Dictyocaulus viviparus infections in calves.Veterinary Parasitology, 1996, 64, 187-196
134. A Kloosterman, HW Ploeger, E Pieke, TJGM Lam and J Verhoeff. The value of bulk milk ELISA Ostertagia antibody titres as indicators of milk production response to anthelmintic treatment in the dry period. Veterinary Parasitology, 1996, 64, 197-205.
135. TJGM Lam, LJA Lipman, YH Schukken, W Gaastra and A Brand. Epidemiological characteristics of bovine clinical mastitis caused by Staphylococcus aureus and Escherichia coli studied by DNA fingerprinting. American Journal of Veterinary Research, 1996, 57, 39-42.
136. TJGM Lam, LA van Wuijckhuise, P Franken, ML Morselt, EG Hartman and YH Schukken. Evaluation of the use of composite milk samples for diagnosis of Staphylococcus aureus infections in dairy cattle. Journal of the American Veterinary Medical Assocation, 1996, 208, 1705-1708.
137. LJA Lipman, A de Nijs, TJGM Lam and W Gaastra. Identification of Escherichia coli strains from cows with clinical mastitis by serotyping and DNA polymorphism patterns with REP and ERIC primers. Veterinary Microbiology, 1995, 43, 13-19.
138. AWCA Cornelissen, R Verstegen, H van den Brand, NM Perié, M Eysker, TJGM Lam and A Pijpers. An observational study of Eimeria species in housed cattle on Dutch dairy farms. Veterinary Parasitology, 1995, 56, 7-16.
139. M Eysker, JH Boersema, FNJ Koopman and TJGM Lam.The combined effect of fenbendazole treatment and a move to aftermath 7 or 9 weeks after turnout on nematode infections in calves. Veterinary Parasitology, 1995, 60, 339-348.
140. TJGM Lam, A Pengov, YH Schukken, JAH Smit and A Brand. The differentiation of Staphylococcus aureus from other Micrococcaceae isolated from bovine mammary glands. Journal of Applied Bacteriology, 1995, 79, 69-72.
141. YH Schukken, TJGM Lam, M Nielen, H Hogeveen, HW Barkema and FJ Grommers. Subclinical and clinical mastitis on dairy herds in the Netherlands: epidemiological findings. Dutch Veterinary Journal, 1995, 120, 208-213.
142. TJGM Lam, JH van Vliet and YH Schukken. Teat disinfection and Mastitis in dairy cattle: a literature review. Dutch Veterinary Journal, 1995, 120, 392-399.
143. ML Morselt, TJGM Lam, LA van Wuijckhuise, P Franken, EG Hartman and YH Schukken. Reliability of bacteriological culturing of composite samples for the diagnosis of subclinical mastitis in dairy cows. Dutch Veterinary Journal, 1995, 120, 426-430.
144. SH Loeffler, TJGM Lam, HW Barkema, D Scholten, ALD Hessels and AM van Gestel. The herd health approach of a high BMSCC caused by Streptococcus agalactiae. Dutch Veterinary Journal, 1995, 120, 458-463.
145. LMTE Lansbergen, M Nielen, TJGM Lam, A Pengov, YH Schukken and K Maatje. Evaluation of a prototype on-line electrical conductivity system for detection of subclinical mastitis. Journal of Dairy Science, 1994, 77, 1132-1140.
146. M Eysker, EW Claessens, TJGM Lam, MJ Moons and A Pijpers. The prevalence of patent lungworm infections in herds of dairy cows in the Netherlands. Veterinary Parasitology, 1994, 53, 263-267.
147. A Kloosterman, J Verhoeff, HW Ploeger and TJGM Lam.Antibodies against nematodes in serum, milk and bulk milk samples as possible estimators of infection in dairy cows. Veterinary Parasitology, 1993, 47, 267-278.
148. TJGM Lam, YH Schukken, FJ Grommers, JAH Smit and A Brand.Within-herd and between-herd variation in diagnosis of clinical mastitis in cattle. Journal of the American Veterinary Medical Association, 1993, 202, 938-942.
149. HR Suichies, HW Merkens, EN Noordhuizen-Stassen and TJGM Lam. Digital Dermatitis? Thoughts on the evaluation of an intensive therapy. Dutch Veterinary Journal, 1993; 118, 116-119.
150. RC Nap, DJ Breen, TJGM Lam, IOM Peters, A Willemsen and JJ de Bruyne. Painkillers; use of aspirin in the dog; influences of tablet type and feeding regime non  plasma-salicylaatconcentrations. Dutch Veterinary Journal, 1993, 118, 439-442.
151. RC Nap, DJ Breen, TJGM Lam and JJ de Bruyne. Gastric retention of enteric-coated tablets in beagle dogs. Journal of Veterinary Pharmacology and Therapeutics, 1990,13, 148-153.
152. Contributions to books
153. TJGM Lam and S De Vliegher. Udder Health Manual. In Dutch: ISBN 978-90-82232127, 33300. 2017.
154. R Wessels, TJGM Lam and J Jansen. Veterinary Communication Handbook. In Dutch: ISBN 978-90-9027491-1, 228 pp. 2013 In English: ISBN 978-90-822321-0-3, 230pp. 2013. In Spanish ISBN 978-90-822321-1-0 244 pp. 2014.
155. J Hulsen, TJGM Lam and YH Schukken. Udder Health, a practical guide to first-rate udder health. Large herd edition. Roodbont Publishers, Zutphen. 68 pp. 2013.
156. H Hogeveen and TJGM Lam. Udder Health and Communication. Editor. Wageningen Academic Publishers ISBN 978-90-8686-185-9, 427 pp. 2011.
157. TJGM Lam. Mastitis control. From science to practice. Editor. Wageningen Academic Publishers. ISBN 978-90-8686-085-2, 453 pp. 2008.
158. J Hulsen and TJGM Lam. Udder Health. A practical guide to first-rate udder health. Roodbont Publishers, Zutphen, the Netherlands. ISBN 978-90-810974-1-3. 52 pp. 2006.
159. A Bradley, HW Barkema A Biggs, M Green and TJGM Lam. Control of mastitis and Enhancement of milk quality. In: Dairy Herd Health Ed. M Green 2013 Cabi International, ISBNN-13: 978 1 84593 997 7, pp 117-167.
160. TJGM Lam, J Jansen, JCL van Veersen and CDM Steuten. Improving cattle health: knowledge transfer and motivation. In: Ruminant formula for the future: nutrition or pathology? Eds. Sylvie Andrieu and Helen Warren p. 11-24. 2009.
161. YH Schukken and TJGM Lam. Monitoring udder health: execution; Monitoring udder health: decision making, analysis, intervention and follow-up; Monitoring udder health: case studies. In: Herd health and production management in dairy practice. Eds. A Brand, YH Schukken and JPTM Noordhuizen ISBN 90-74134-34-3, pp 361-370; 371 – 384; 409 - 426. 1996.

Invited international lectures
Theo has given scientific key-note presentations on bovine mastitis, antibiotic use communication and several other subjects all over the world. i.e. Slovenia, Australia, USA, Switzerland, Sicily, Scotland, Canada, Belgium, Greece, Ireland, Spain, New Zealand, South Africa, Bulgaria, Hungary, England, Denmark, Sweden.