Sokoine University of Agriculture

Prevalence and antimicrobial profiles of staphylococcus Aureus isolated from raw bovine milk in dairy and pastoral Farms of Morogoro, Tanzania

Show simple item record Evans, N. K 2021-07-08T17:25:04Z 2021-07-08T17:25:04Z 2020
dc.description Masters Thesis en_US
dc.description.abstract Staphylococcus aureus is an economic significant bacterium in dairy industry that can be spread to humans through consumption of raw milk causing foodborne infections. Severity of S. aureus infections either in animals or humans is enhanced by acquisition of resistance to methicillin. A cross-sectional study was carried out to establish prevalence, antibiotic susceptibility patterns and molecular characteristics of S. aureus in raw bovine milk from dairy and pastoral farms in Mvomero and Morogoro Urban Districts, Tanzania. A total of 397 milk samples were randomly collected from various wards in the study area. The pure isolates were identified by their cultural, morphological and biochemical features. Kirby Bauer Disk Diffusion method was used for the susceptibility testing. Multiplex PCR was used for detection of Methicillin resistance and virulence genes. Analysis of results revealed a prevalence of 124/397 (31.2%) for coagulase positive S. aureus (COPS) and 29/397 (7.3%) for coagulase negative Staphylococci (CONS) isolates based on conventional identification. All Coagulase positive S. aureus isolates were susceptible to cefoxitin(30μg) and chloramphenicol (50μg) but had resistance to penicillin G (10 UI), tetracycline (30μg), amoxicillin-clavulanic (30μg), oxacillin (1μg), gentamicin (10μg), and trimethoprim-sulfamethoxazole (30μg) at 93.5%, 28.2%, 25%, 22.6%, 8.1% and 1.6% respectively. The results also revealed that CONS had resistance of 86.2%, 17.2%, 17.2%, 10.3%, and 3.4% to penicillin G (10 UI), tetracycline (30μg), oxacillin (1μg), amoxicillin-clavulanic (30μg) and trimethoprim-sulfamethoxazole (30μg) but were susceptible to chloramphenicol (50μg), cefoxitin (30μg) and gentamicin (10μg). Of the 124 S. aureus isolates, 80 (64.5%) had spa gene and 1/124 (0.8% mecA gene. S. aureus (31.2%) isolated from raw bovine milk at farm level constitutes a health hazard to consumers hence, highlighting the importance of observing hygienic milking practices as well as educating livestock farmers on proper usage of antimicrobials. en_US
dc.description.sponsorship Inter-University Council of East Africa-World Bank en_US
dc.language.iso en en_US
dc.publisher Sokoine University of Agriculture en_US
dc.subject Staphylococcus Aureus en_US
dc.subject Antimicrobial profiles en_US
dc.subject Pastoral Farms en_US
dc.subject Raw bovine milk en_US
dc.subject Morogoro en_US
dc.subject Tanzania en_US
dc.title Prevalence and antimicrobial profiles of staphylococcus Aureus isolated from raw bovine milk in dairy and pastoral Farms of Morogoro, Tanzania en_US
dc.type Thesis en_US

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