Abstract
Milk samples from 1487 heifers with symptoms of clinical mastitis and secretions from 351 clinically healthy heifers were bacteriologically investigated. Streptococcus dysgalactiae, Streptococcus uberis, Staphylococcus aureus, Escherichia coli and Actinomyces (Coryne-bacterium) pyogenes were the most frequently isolated bacterial species of clinical heifer mastitis. These bacteria, Peptostreptococcus indolicus, Stuart-Schwan cocci and strict anaerobic bacteria were often isolated as mixed infections. The frequency of clinical cases of heifer mastitis is largest in July-September but the distribution between different bacterial species is almost the same at different times of the year. Most of the cases were seen during the first week post-partum. Coagulase-negative staphylococci were the dominating bacteria in clinically healthy heifers.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call