Determination of ecovars, antibiotic susceptibility and tst gene frequency in Staphylococcus aureus isolated from dairy food products

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HAKIMI ALNI R.; MOHAMMADZADEH A.; Mahmoodi Koohi p.; PAJOHI ALAMOTI M.R.

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Journal: SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL Year:2018 | Volume:14 | Issue:3 Page(s): 41-49

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Title

Determination of ecovars, antibiotic susceptibility and tst gene frequency in Staphylococcus aureus isolated from dairy food products

Author(s)

HAKIMI ALNI R. | MOHAMMADZADEH A. | Mahmoodi Koohi p. | PAJOHI ALAMOTI M.R. | Issue Writer Certificate

Keywords

Staphylococcus aureusQ1

BiotypingQ2

tst geneQ1

Antibiotic susceptibility testQ1

Abstract

S. aureus is a major cause of food borne diseases throughout the world. The aim of the present study was the identification of source contamination and tst gene in Staphylococcus aureus isolated from food of animal origin in Hamedan city. In this study, the contamination sources of 65 S. aureus isolates which had previously been isolated from cream pastry (45 isolates) and traditional Iranian white cheese (20 isolates) were evaluated using Biotyping method. Meanwhile, the identification of tst gene by PCR method and susceptibility of the isolates against several antibiotics was examined using standard disk diffusion test. Of the 65 biotyped isolates, 52. 3% (34 isolates) and 44. 6% (29 isolates) belonged to the host specific (HS) and non-host specific (NHS) biotypes, respectively, and 3. 1% of the isolates (2 isolates) were not placed in certain types. Besides, human ecovars in cream pastry and bovine ecovars in cheese samples were predominant. The prevalence rate of tst gene in the isolates was 4. 6% (3 isolates), and according to the results of antimicrobial susceptibility test, HS biotypes showed higher resistance rather than NHS biotypes. Due to the abundance of human and bovine Staphylococcal ecovars in cream pastry and cheese samples, respectively, it can be concluded that the contamination of cream pastry and cheese samples may be originated from humans and cattle. Also, because of high antibiotic resistance and presence of tst gene among HS biotypes and the possibility of their circulation in the community can have a potentially alarming effect on general health of community.

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APA: Copy

HAKIMI ALNI, R., MOHAMMADZADEH, A., Mahmoodi Koohi, p., & PAJOHI ALAMOTI, M.R.. (2018). Determination of ecovars, antibiotic susceptibility and tst gene frequency in Staphylococcus aureus isolated from dairy food products. SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL, 14(3 ), 41-49. SID. https://sid.ir/paper/357491/en

Vancouver: Copy

HAKIMI ALNI R., MOHAMMADZADEH A., Mahmoodi Koohi p., PAJOHI ALAMOTI M.R.. Determination of ecovars, antibiotic susceptibility and tst gene frequency in Staphylococcus aureus isolated from dairy food products. SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL[Internet]. 2018;14(3 ):41-49. Available from: https://sid.ir/paper/357491/en

IEEE: Copy

R. HAKIMI ALNI, A. MOHAMMADZADEH, p. Mahmoodi Koohi, and M.R. PAJOHI ALAMOTI, “Determination of ecovars, antibiotic susceptibility and tst gene frequency in Staphylococcus aureus isolated from dairy food products,” SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL, vol. 14, no. 3 , pp. 41–49, 2018, [Online]. Available: https://sid.ir/paper/357491/en

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