PMCCPMCCPMCC

Search tips
Search criteria 

Advanced

 
Logo of canvetjReference to the Publisher site.Journal Web siteJournal Web siteHow to Submit
 
Can Vet J. 2010 January; 51(1): 9.
PMCID: PMC2797358

MAP in the environment of dairy herds — A comment

Viroj Wiwanitkit, Professor

Dear Sir,

I read the recent publication on Mycobacterium avium subsp. paratuberculosis (MAP) in the environment of dairy herds by Pillars et al (1) with great interest. Pillars et al (1) reached the conclusion that “Environmental contamination with MAP is consistent over time on infected dairy farms, and management practices to reduce environmental contamination are warranted.” Indeed, the problem of contamination is confirmed. A similar study from California was recently reported (2). However, an interesting point is the seasonal variation and other variations due to environmental fluctuation (such as humidity and temperature) that are hardly reported. In Norway, the peak of MAP detection in milk from dairy goats was reported to be in February to March (3). An additional study on the correlation between geographical parameters and the rate of contamination for the case in Michigan might be useful. The data can be helpful in surveillance plans for foodborne disease control.

References

1. Pillars RB, Grooms DL, Kaneene JB. Longitudinal study of the distribution of Mycobacterium avium subsp. paratuberculosis in the environment of dairy herds in the Michigan Johne’s disease control demonstration herd project. Can Vet J. 2009;50:1039–1046. [PMC free article] [PubMed]
2. Ruzante JM, Gardner IA, Cullor JS, Smith WL, Kirk JH, Adaska JM. Isolation of Mycobacterium avium subsp. paratuberculosis from waste milk delivered to California calf ranches. Foodborne Pathog Dis. 2008;5:681–686. [PubMed]
3. Djønne B, Jensen MR, Grant IR, Holstad G. Detection by immuno-magnetic PCR of Mycobacterium avium subsp. paratuberculosis in milk from dairy goats in Norway. Vet Microbiol. 2003;20(92):135–143. [PubMed]

Articles from The Canadian Veterinary Journal are provided here courtesy of Canadian Veterinary Medical Association