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Prevalence and Bacterial Etiology of Subclinical Mastitis in Goats Reared in Organized Farms


Affiliations
1 Division of Animal Health, ICAR-Central Institute for Research on Goats, Makhdoom, Farah, Mathura-281122, Uttar Pradesh, India
2 Department of Veterinary Pathology, College of Veterinary Sciences, N.D.U.A.&T., Faizabad-224229, Uttar Pradesh, India
3 Division of Bacteriology, ICAR-Indian Veterinary Research Institute, Izatnagar-243122, Uttar Pradesh, India
 

Aim: Assessment of the status of subclinical mastitis (SCM) in Jamunapari and Barbari goats in Indian organized farms, the involvement of bacterial pathogens and their sensitivity to antibiotics.
Materials and Methods: A total of 181 composite milk samples were aseptically collected from the apparently healthy Barbari (n=95) and Jamunapari (n=86) goats. The California mastitis test (CMT) and somatic cell count (SCC) were used to diagnose SCM. The milk samples with CMT scores of 0 and +1 were considered as negative, while the samples with the score of +2 or +3 were taken as positive, and further, the positive samples were used for the bacteriological examination. An antibiotic sensitivity test was performed by disk diffusion method using seven commercially available antibiotic discs.
Results: All the samples having CMT score of +2 or +3 demonstrated SCC more than 1 million. Overall, the prevalence of SCM in the goats was assessed as 19.89% (36/181). The prevalence of SCM in Barbari and Jamunapari goats was found as 24.21% (23/95) and 15.12% (13/86), respectively. Out of 11 isolates of Staphylococci, 9 isolates were identified as coagulase-negative Staphylococci (CNS), whereas 2 isolates were found as Staphylococcus aureus. The identified bacterial isolates (n=30) did not show antibiotic resistance.
Conclusion: The current investigation showed the considerable prevalence of SCM among Jamunapari and Barbari goats which may have a negative impact on quantity and quality of the milk. CNS was found as the most prevalent cause of SCM in the goats. Negligible antibiotic resistance was found among the identified udder pathogens.

Keywords

California Mastitis Test, Coagulase-Negative Staphylococci, Goat, Somatic Cell Count, Subclinical Mastitis.
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  • Prevalence and Bacterial Etiology of Subclinical Mastitis in Goats Reared in Organized Farms

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Authors

A. K. Mishra
Division of Animal Health, ICAR-Central Institute for Research on Goats, Makhdoom, Farah, Mathura-281122, Uttar Pradesh, India
Nitika Sharma
Division of Animal Health, ICAR-Central Institute for Research on Goats, Makhdoom, Farah, Mathura-281122, Uttar Pradesh, India
D. D. Singh
Department of Veterinary Pathology, College of Veterinary Sciences, N.D.U.A.&T., Faizabad-224229, Uttar Pradesh, India
K. Gururaj
Division of Animal Health, ICAR-Central Institute for Research on Goats, Makhdoom, Farah, Mathura-281122, Uttar Pradesh, India
Abhishek
Division of Bacteriology, ICAR-Indian Veterinary Research Institute, Izatnagar-243122, Uttar Pradesh, India
Vijay Kumar
Division of Animal Health, ICAR-Central Institute for Research on Goats, Makhdoom, Farah, Mathura-281122, Uttar Pradesh, India
D. K. Sharma
Division of Animal Health, ICAR-Central Institute for Research on Goats, Makhdoom, Farah, Mathura-281122, Uttar Pradesh, India

Abstract


Aim: Assessment of the status of subclinical mastitis (SCM) in Jamunapari and Barbari goats in Indian organized farms, the involvement of bacterial pathogens and their sensitivity to antibiotics.
Materials and Methods: A total of 181 composite milk samples were aseptically collected from the apparently healthy Barbari (n=95) and Jamunapari (n=86) goats. The California mastitis test (CMT) and somatic cell count (SCC) were used to diagnose SCM. The milk samples with CMT scores of 0 and +1 were considered as negative, while the samples with the score of +2 or +3 were taken as positive, and further, the positive samples were used for the bacteriological examination. An antibiotic sensitivity test was performed by disk diffusion method using seven commercially available antibiotic discs.
Results: All the samples having CMT score of +2 or +3 demonstrated SCC more than 1 million. Overall, the prevalence of SCM in the goats was assessed as 19.89% (36/181). The prevalence of SCM in Barbari and Jamunapari goats was found as 24.21% (23/95) and 15.12% (13/86), respectively. Out of 11 isolates of Staphylococci, 9 isolates were identified as coagulase-negative Staphylococci (CNS), whereas 2 isolates were found as Staphylococcus aureus. The identified bacterial isolates (n=30) did not show antibiotic resistance.
Conclusion: The current investigation showed the considerable prevalence of SCM among Jamunapari and Barbari goats which may have a negative impact on quantity and quality of the milk. CNS was found as the most prevalent cause of SCM in the goats. Negligible antibiotic resistance was found among the identified udder pathogens.

Keywords


California Mastitis Test, Coagulase-Negative Staphylococci, Goat, Somatic Cell Count, Subclinical Mastitis.