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Results from using the DairyTech line of products speak for themselves, but as more research on the subject becomes available we post it here.

UV Light Inactivation of Mycobacterium avium subsp. paratuberculosis in Milk as Assessed by FASTPlaqueTB Phage Assay and Culture


UV light has been used for the disinfection of drinking water and wastewater systems to inactivate potential waterborne pathogens for many years (2). UV light at wavelengths shorter than 280 nm (termed UV-C) has a germicidal effect on most types of microorganisms by formation of thymine dimers in DNA and RNA that inhibit transcription and replication of nucleic acids, thereby rendering the microorganism unable to reproduce (12, 17).


APPLIED AND ENVIRONMENTAL MICROBIOLOGY, June 2007, p. 3728–3733 Vol. 73, No. 11

Inactivation of Mycobacterium avium ssp. paratuberculosis in milk by UV treatment


Mycobacterium avium ssp. paratuberculosis (Map) is the known cause of Johne’s disease which affects both wild and domestic ruminants (Beard et al. 2001), particularly dairy cattle (Clarke 1997). The organism has also been implicated as a cause of Crohn’s disease in humans that manifests as a chronic enteritis which is incurable, although sufferers can experience periods of remission (Behr and Kapur 2008). Myco. avium ssp. paratuberculosis is excreted directly into the milk and faeces of infected animals in low and very high numbers respectively (Cocito et al. 1994).


Journal compilation ª 2009 The Society for Applied Microbiology, Letters in Applied Microbiology 49 (2009) 217–221 217

Research shows first-lactation benefit to feeding whole milk to calves


In a recently published study, heifers fed whole milk before weaning produced more milk during their first lactation than those fed milk replacer as calves. Israeli researchers published these results in the June issue of the Journal of Dairy Science.


Effects of Feeding Heat-Treated Colostrum on Passive Transfer of Immune and Nutritional Parameters in Neonatal Dairy Calves


“The most exciting result from this study was that feeding heat-treated colostrum resulted in greater serum IgG concentrations in calves, despite the fact that calves in both treatment groups were fed the same total mass of IgG at the same time after birth and using the same feeding method. The authors hypothesize that greater serum IgG concentrations could have resulted because calves receiving heat-treated colostrum were able to absorb a greater proportion of the total mass of IgG presented to the small intestine.”


J. L. Johnson, S. M. Godden,1 T. Molitor, T. Ames, and D. Hagman
Department of Veterinary Population Medicine, University of Minnesota, St Paul 55108

Heat-Treatment of Bovine Colostrum. II: Effects of Heating Duration on Pathogen Viability and Immunoglobulin G


“Large (30-L) batches of moderate- to high-quality bovine colostrum can be heat-treated in a commercial on farm batch pasteurizer at 60°C for at least 120 min without affecting the IgG concentration or sctivity. Mycoplasma bovis, L. monocytogenes, E. coli O157:H7, and S. enteritidis added tocolostrum could not be recovered after colostrum was heat-treated at 60°C for 30 min. Heat-treatment at 60°C for 60 min should be sufficient to eliminate Mycobacterium avium subsp. paratuberculosis (Map) from colostrum in most situations.”


S. Godden,*1 S. McMartin,* J. Feirtag,† J. Stabel,‡ R. Bey,§ S. Goyal, § L. Metzger,† J. Fetrow,* S. Wells,* and H. Chester-Jones¦

*Department of Veterinary Population Medicine, and
†Department of Food Science and Nutrition, University of Minnesota
‡USDA, ARS, National Animal Disease Center, Ames, IA 50010
§Department of Veterinary and Biomedical Sciences, and
¦Department of Animal Science, University of Minnesota, St. Paul 55108

J. Dairy Sci. 89:3476–3483 ©American Dairy Science Association, 2006.

Calf Diseases and Prevention


“The productivity of the herd can be negatively impacted by impaired growth of calves, decreased milk production of animals that experienced chronic illness as baby calves, spread of infectious diseases from calves to adult cows, increased veterinary costs and the limited opportunity for genetic selection due to high mortality of replacement animals."


Sheila M. McGuirk, DVM, PhD and Pamela Ruegg, DVM, MPVM
University of Wisconsin-Madison

On-Farm Batch Pasteurization Destroys Mycobacterium paratuberculosis in Waste Milk


“These results suggest that batch pasteurization of waste milk contaminated with M. paratuberculosis was effective at generating a clean product to feed to young calves.”


J. R. Stabel
National Animal Disease Center,
2300 Dayton Rd.,
Ames, IA 5001

J. Dairy Sci. 84:524–527 ©American Dairy Science Association, 2001.

Pasteurized Milk and Colostrum for Calves: An Option or Necessity?



“Studies have shown that pasteurization, both batch and HTST, is effective in destroying viable bacteria for most of the pathogenic species threatening calves. Two studies to-date have used commercial on-farm pasteurization units; one a batch unit, the other HTST–both demonstrated that the pasteurization unit effectively destroyed the Johne’s organism.”


Sandra Godden* and Hugh Chester-Jones¦
*Department of Veterinary Population Medicine, and
¦Department of Animal Science, University of Minnesota, St. Paul 55108



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