| 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 m ... | 1999 | 10932757 |