Mastitis outbreak due to Mycoplasma californicum and Mycoplasma canadense in a commercial dairy herd in the state of Jalisco, México.
A commercial dairy herd with 282 cows in lactation suddenly began to have a problem with atypical clinical mastitis. The first 28 cases showed severe purulent mastitis with hard swollen mammary glands, but without systemic signs of illness Some of the cows were lame. The cases were not responsive to antibiotics. The evidence suggested that milking machine malfunction and other management practices may have contributed to spread infection and to increase the number of clinical cases. Culture of milk of the affected cows and bulk tank milk yielded mycoplasma colonies that were identified as Mycoplasma californicum and Mycoplasma canadense. This is the first isolation and report of these mycoplasmas in México and Latin America. The 28 positive cows were segregated and culled; however, the owner did not follow the recommendations to sample all the milking and dry cows and to implement other preventive measures. Consequently, losses were much greater and 177 cows were culled.
Infante-Martínez
F
F
División de Graduados, UAM Agronomía y Ciencias, Universidad Autónoma de Tamaulipas, México.
Aguado
J
J
Eduard-Jasper
D
D
D000822:Animal Husbandry / Q000295:instrumentation / Q000379:methods; D000818:Animals; D002417:Cattle; D004196:Disease Outbreaks / Q000662:veterinary*; D004866:Equipment Contamination; D005260:Female; D008414:Mastitis, Bovine / Q000453:epidemiology* / Q000517:prevention & control; D008800:Mexico / Q000453:epidemiology; D008892:Milk / Q000382:microbiology; D009174:Mycoplasma / Q000145:classification / Q000302:isolation & purification*; D009175:Mycoplasma Infections / Q000453:epidemiology / Q000517:prevention & control / Q000662:veterinary*