Advances in Animal and Veterinary Sciences

Short Communication
Adv. Anim. Vet. Sci. 1 (4): 120 - 122
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Amit Kumar1, Amit Kumar Verma2*, Anu Rahal3, Arvind Kumar Sharma1, Sumit Varshney1, Manoj Kumar Gupta1
1Department of Veterinary Microbiology and Immunology, 2Department of Veterinary Epidemiology & Preventive Medicine, 3Department of Veterinary Pharmacology and Toxicology, Uttar Pradesh Pandit Deen Dayal Upadhayay Pashu Chikitsa Vigyan Vishwavidyalaya Evum Go-Anusandhan Sansthan (DUVASU), Mathura, India – 281001.
*Corresponding author:


The functioning of mammary glands is affected by clinical as well as subclinical mastitis and has a major economic impact on the sheep and goat dairy industries. In the present study, in sheep flock of 120 sheep, 12 lambs suffered from debilitated conditions leading to the death of 4 lambs without showing any clinical disease condition. The postmortem findings revealed no or minimum intake of feed/milk by lambs prior to death. However, these were suckling prior to death. On clinical examination of ewes, mastitis appeared in 17 out of 45 lactating ewes in the flock. Streptococcus agalactiae was recovered from the mastitic ewes in pure cultures. All the clinical isolates had identical cultural, morphological and biochemical profiles. The antimicrobial susceptibility patterns were assessed against 24 standard discs and it revealed drug resistance against the commonly used antibiotics particularly for the intra mammary preparations in mastitis viz., penicillin, ampicillin and cloxacillin. The organism was found sensitive to most of the quinolones group of antibiotics and the treatment with enrofloxacin recovered all the mastitic ewes without any complication. It appears to be the first report of its kind in India where monoculture of Streptococcus agalactiae was obtained from mastitic cases of sheep which led to agalactia and ultimately the death of neonatal lambs. It can be concluded that mastitis in ewes may cause high morbidity and rapid reduction in milk leading to the death of neonatal lambs. Streptococcus agalactiae should be considered as a noteworthy pathogen that induces mastitis and can easily be transmitted between ewes and has developed significant antibiotic resistance.

Key Words: Mastitis; Lamb Mortality; Antibiotic sensitivity; Sheep; Streptococcus agalactiae