Screening of sub-clinical mastitis in dairy cows of organised farms using three diagnostic test

Priya, M G Amritha; Vijayakumar, K.; Vinodkumar, K.; Davis, K. Justin; Radhika, G.

doi:10.51966/jvas.2021.52.1.73-76

J Vet Anim Sci

2021

DOI: 10.51966/jvas.2021.52.1.73-76

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Screening of sub-clinical mastitis in dairy cows of organised farms using three diagnostic test

M G Amritha Priya¹,

K. Vijayakumar²,

K. Vinodkumar³

et al.

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2023

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“…Subclinical mastitis (SCM) is a major concern as it leads to considerable economic loss in organised dairy farms, compared to clinical mastitis.A high prevalence of SCM (54 per cent) was reported from organised farms in Kerala (Amrithapriya et al, 2021). Coagulase negative staphylococcal outbreaks have to be closely monitored because they were known to be more resistant to antibiotics than S. aureus (Taponen and Pyorala, 2009).…”

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confidence: 99%

Molecular characterisation of antimicrobial resistance in coagulase negative staphylococci isolated from bovine subclinical mastitis

Anaina¹,

Vijayakumar²,

Davis³

et al. 2023

Journal of Veterinary and Animal Sciences

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Coagulase negative staphylococci (CNS) are emerging as the most prevalent causative agent of bovine mastitis. They are resistant to many commonly used antibiotics due to the presence of antimicrobial resistance (AMR) genes. A study was conducted to evaluate the AMR profiling of CNS isolated from bovine subclinical mastitis.Coagulase negative staphylococci were isolated from 49 (44.95 per cent) of the subclinical mastitis samples. Disc diffusion assay revealed that highest resistance was shown against gentamicin (42.85 per cent) followed by methicillin (32.6 per cent), ceftriaxone – tazobactam (24.48 per cent), enrofloxacin (20.4 per cent), tetracycline (16.32 per cent) and least resistance to cotrimoxazole (4 per cent). Genotypic characterisation of AMR genes such as mecA, aacA-aphD and norA by PCR was done for determining resistance to methicillin, gentamicin and fluroquinolone resistance. The CNS carried aacA-aphD, norA and mecA in 44.89 per cent, 32.65 per cent and 14.28 per cent, respectively. Comparison of phenotypic and genotypic characterisation of AMR in CNS was carried out by McNemar test and it was found that there was significant difference between the presence of mecA gene and methicillin resistance. There was no significant difference noticed forcharacterisation of phenotypic and genotypic AMR of CNS for gentamicin and fluroquinolone resistance.

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mentioning

confidence: 99%

Molecular characterisation of antimicrobial resistance in coagulase negative staphylococci isolated from bovine subclinical mastitis

Anaina¹,

Vijayakumar²,

Davis³

et al. 2023

Journal of Veterinary and Animal Sciences

View full text Add to dashboard Cite

show abstract

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Screening of sub-clinical mastitis in dairy cows of organised farms using three diagnostic test

Cited by 1 publication

References 7 publications

Molecular characterisation of antimicrobial resistance in coagulase negative staphylococci isolated from bovine subclinical mastitis

Molecular characterisation of antimicrobial resistance in coagulase negative staphylococci isolated from bovine subclinical mastitis

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