Genotypic and Phenotypic Correlation of Antimicrobial Resistance in Bacterial Isolates from Mastitic Milk

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  • Gurleen Kour Guru Angad Dev Veterinary and Animal Sciences University
  • Mudit Chandra Guru Angad Dev Veterinary and Animal Sciences University
  • Gurpreet Kaur Guru Angad Dev Veterinary and Animal Sciences University
  • Deepti Narang Guru Angad Dev Veterinary and Animal Sciences University
  • Dhiraj Kumar Gupta Guru Angad Dev Veterinary and Animal Sciences University
  • Anil Kumar Arora Guru Angad Dev Veterinary and Animal Sciences University


Mastitis, milk, PCR, antibiotic resistance genes


In the present study, milk samples from mastitic animals were collected and screened for the isolation and identification of bacterial etiological agents. Out of a total of 102 milk samples, 50 samples yielded bacterial growth. The bacteria identified were Staphylococcus (43), Streptococcus (15), E. coli (26) and Klebsiella (19). All the bacterial isolates were subjected to antibiotic sensitivity testing. Further, DNA from these bacterial isolates was isolated and subjected to PCR using genus specific primers which revealed that all the isolates were conforming to their respective genus. Also, DNA was subjected to  PCR to detect the presence of aac (3)-iv, blaSHV, aadA and tetB, tetM, erm A, mec A and blaZ, tetM, ermB, blaZ and mefA antibiotic resistance genes revealed that there was an absolute correlation between the genotypic and phenotypic results of the antibiotic resistance.

Author Biography

  • Mudit Chandra, Guru Angad Dev Veterinary and Animal Sciences University

    Assistant Scientist (Microbiology)



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How to Cite

Genotypic and Phenotypic Correlation of Antimicrobial Resistance in Bacterial Isolates from Mastitic Milk. (2019). ISVIB Journal Veterinary Immunology & Biotechnology, 1(2).