Mastitis in dairy cattle caused by corynebacterium pseudotuberculosis and the feasibility of transmission by houseflies I

I. Yeruham*, Y. Braverman, N. Y. Shpigel, A. Chizov-Ginzburg, A. Saran, M. Winkler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Morbidity due to Corynebacterium pseudotuberculosis infection occurred in 29 dairy herds. The disease appeared basically in three clinical forms: cutaneous, mastitic, and visceral. The appearance of the disease showed a marked seasonality: in 23 herds it occurred during the spring and summer months (dry season) (March-October). The mastitic form occurred in only 10 herds and the causative bacterium was isolated from 33 cows (5.8%). All the strains of C. pseudotuberculosis isolated from the milk samples were found not to be nitrate reducers. The bacterium was excreted in the milk of six cows from herd B during a period of 11 months. In the mastitic cows, a decrease in milk production and considerable increases in the somatic cell count were noted.C. pseudotuberculosis was isolated from houseflies collected over a cow lesion. Laboratory-reared houseflies were successfully infected with C. pseudotuberculosis-contaminated milk, broth and sugar cubes. Flies infected with the bacterium from contaminated milk excreted the bacterium in their droppings for up to 4 h and from their saliva for up to 3 h post infection. The bacterium survived on the external organs of houseflies for no longer than 10 min post infection, after the flies had been dipped in contaminated broth.

Original languageAmerican English
Pages (from-to)87-89
Number of pages3
JournalVeterinary Quarterly
Volume18
Issue number3
DOIs
StatePublished - Sep 1996

Fingerprint

Dive into the research topics of 'Mastitis in dairy cattle caused by corynebacterium pseudotuberculosis and the feasibility of transmission by houseflies I'. Together they form a unique fingerprint.

Cite this