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ANTIMICROBIAL RESISTANCE AND BIOFILM FORMATION OF SOME STAPHYLOCOCCUS SPECIES ISOLATED FROM TRADITIONAL CHEESES

Alex-Cristian Moza, Emil Tîrziu, I. Nichita, I. Bucur, Diana Obiștioiu

First published: 2023-10-01https://doi.org/10.5593/sgem2023/6.1/s25.16View metrics

Abstract

This research aimed to determine the occurrence of different Staphylococcus spp., in three types of Romanian traditional cheeses made of raw milk, and to establish their antimicrobial resistance profile. Additionally, we have also screened the biofilm forming capacity of the S. aureus isolates. Thus, 25 samples (cow telemea n = 10, sheep telemea n = 5, and cow ca? n = 10) were collected from local small producers that sell in urban fresh markets in Timi? county. A total of 64% (16/25) of the examined samples were positive. The bacterial strains were isolated on Mannitol Salt Agar (MSA) medium, then Baird-Parker medium was used to emphasize the coagulase activity. Furthermore, using the Vitek 2 Compact equipment, 17 strains were identified and included in 4 species of Staphylococcus genus, respectively one coagulase-positive (CPS) represented by Staphylococcus aureus 52.97% (9/17), and 3 coagulase-negative (CNS) comprised of S. epidermidis 23.52% (4/17), S. chromogenes 11.76% (2/17) and S. saprophyticus 11.76% (2/17). Disc diffusion method showed that the S. aureus isolates presented more resistance towards penicillin (100%), erythromycin, oxacillin, gentamicin, tetracycline (66.66%), and ciprofloxacin, clindamycin (55.55%). CNS isolates were more resistant towards penicillin (83.33%), erythromycin (66.66%), oxacillin (50), and tetracyclin (41.66%). From the total of 9 S. aureus, all were able to produce biofilms with absorbance at 570 nm.

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Publication details

Title
ANTIMICROBIAL RESISTANCE AND BIOFILM FORMATION OF SOME STAPHYLOCOCCUS SPECIES ISOLATED FROM TRADITIONAL CHEESES
Authors
Alex-Cristian Moza, Emil Tîrziu, I. Nichita, I. Bucur, Diana Obiștioiu
Proceedings
SGEM International Multidisciplinary Scientific GeoConference- EXPO Proceedings; 23rd SGEM International Multidisciplinary Scientific GeoConference Proceedings 2023, Nano, Bio, Green and Space: Technologies for a Sustainable Future, Vol. 23, Issue 6.1
Publisher
STEF92 Technology
Year
2023
Pages
137-144
SWS Citekey
Moza202325137144
ISSN
1314-2704
ISBN
978-619-7603-61-3
Language
en
Publication type
Conference Paper
Proceedings contents
Open official contents
Keywords
References10
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