Abstract

Research Article

Identification, Molecular Confirmation, and Antibiotic Sensitivity of Bacteria Isolated from Repeat Breeder Cows in Rangpur Division

Mst. Mousumi Afroj, Md Faruk Islam, Muhammad Mamunur Roshid, Md Shanto Hossain, Md Samiul Tousif, Omiaya Azam Oishi, Subroto Sarma and Begum Fatema Zohara*

Published: 10 October, 2025 | Volume 9 - Issue 1 | Pages: 008-17

Aims: The study was conducted from January to June 2023 to observe the prevalence of repeat breeding syndrome in cows, to isolate and identify the bacteria with their molecular confirmation, and antibiotic sensitivity in Bangladesh. 
Study design & Place and duration of study: The study was conducted under the supervision of the Department of Medicine, Surgery, and Obstetrics, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200. Some laboratory work was performed at the Microbiology Department of Pathology and Parasitology laboratory, HSTU, from January to June 2023.
Methodology: A questionnaire was used to identify repeat breeding syndrome. Bacteria were isolated and identified from the cervical mucus of affected cows. For confirmation of the detected bacteria, PCR was used. The agar disc diffusion method was utilized to investigate the antibiotic sensitivity of the detected isolates against widely used antibiotics in vitro. 
Results: The prevalence of Repeat Breeding (RB) was 41.33%. The prevalence of E. coli was 40%, Staphylococcus aureus 40% and Klebsiella spp. 10%. Molecular detection of E. coli and Staphylococcus aureus was confirmed by using Eco 223 (F), Eco 455 (R), Sau 234(F), and Sau 1501(R) primers. The target genes were 16S and 23S rRNA, and the size of the product amplified at 232 bp and 1267 bp, respectively. According to the antibiogram profile, E. coli was resistant to ciprofloxacin, penicillin, tetracycline, amoxicillin, and erythromycin, but sensitive to ceftriaxone and gentamicin. While Staphylococcus aureus was resistant to ampicillin and erythromycin, it was sensitive to ciprofloxacin, ceftriaxone, and levofloxacin. It was also intermediately resistant to vancomycin and amoxicillin. Klebsiella spp. Showed resistance to ceftriaxone, penicillin, and amoxicillin, while remaining sensitive to ciprofloxacin, tetracycline, and intermediate resistance to erythromycin and gentamicin. 
Conclusion: This study concluded that E. coli, Staphylococcus aureus, and Klebsiella spp. are the most common bacteria causing repeat breeding syndrome in cows.

Read Full Article HTML DOI: 10.29328/journal.ivs.1001047 Cite this Article Read Full Article PDF

Keywords:

Antibiotic sensitivity; Bacteria; Molecular confirmation; PCR; Repeat breeding

References

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