Antimicrobial resistance patterns and plasmid profiles of Staphylococcus aureus isolated from milk and meat

Citation:
NYARONGI PROFOMBUIJ. "Antimicrobial resistance patterns and plasmid profiles of Staphylococcus aureus isolated from milk and meat.". In: journal. University of Nairobi Press; 2000.

Abstract:

Objectives: To determine the frequency of resistance of Staphylococcus aureus (S. aureus) to various antimicrobial agents, and the relationship between antimicrobial resistance of the isolates and carriage of plasmids.
Design: A random sampling of milk and meat samples was carried out.
Setting: Milk was collected from various dairy cooperative societies in Nairobi and Kiambu Districts. Minced meat samples were purchased from various outlets in the city of Nairobi.
Subjects: Ninety six S. aureus isolates from milk (seventy five isolates) and minced meat (twenty one isolates) samples.
Main outcome measures: Plasmid profiles and antimicrobial susceptibility tests to lincomysin, pencillin, erthromycin, methicillin, minocycline, cotrimoxazole and  chloramphenicol, cotrimoxazole and chloamphenicol.
Results: Seventy one percent of the isolates carried between one and six plasmids of molecular sizes ranging from 0.1 to 14.5 kilobases. High frequency of resistance was observed with lincomycin (67.7%), penicillin (66.7%) and cotrimoxazole (51%). A high percentage (76%) of isolates were susceptible to minocycline followed by erythromycin (57.3%). Most (80.2%) of the isolates were multiply resistant to between two and six antibiotics.
Conclusions: Most S. aureus isolates were multiply resistant to various antimicrobial agents, but there was no apparent relationship between carriage of plasmids and antimicrobial resistance. Milk and meat may contain resistant S. aureus posing a potential risk to consumers.

Notes:

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