Saravanan Murugesan1, Nagaraj Perumal1, Surya Prakash Mahalingam2, Selva Kumar Dilliappan2, Padma Krishnan3. 1. Research Scholar, Department of Microbiology, Dr. ALM PG Institute of Basic Medical Sciences, University of Madras , Taramani, Chennai, India . 2. Project Trainee, Department of Microbiology, Dr. ALM PG Institute of Basic Medical Sciences, University of Madras , Taramani, Chennai, India . 3. Assistant Professor, Department of Microbiology, Dr. ALM PG Institute of Basic Medical Sciences, University of Madras , Taramani, Chennai, India .
Abstract
OBJECTIVE: The study was designed to find the distribution of SCCmec types and the various antibiotic resistance genes amongst MR-CoNS isolates from asymptomatic individuals. MATERIALS AND METHODS: A total of 145 nasal swabs were collected from asymptomatic healthy individuals from community settings. Identification and speciation of CoNS were done by standard biochemical methods. Screening of methicillin resistance (mecA gene) and detection of various antibiotic resistant genes were done using multiplex PCR method. SCCmec types (I - V) were determined using multiplex PCR. RESULTS: 50 (44.6%) isolates were found to be methicillin resistant both by cefoxitin method and multiplex PCR. S. epidermidis (40%) was the predominant species followed by S. haemolyticus (28%), S. hominis (20%) and S. warneri (12%). Highest resistance was shown for cotrimoxazole (26%), followed by ciprofloxacin (24%), tetracycline (20%), erythromycin (18%), fusidic acid (10%) and mupirocin (6%). Among SCCmec types, 44 isolates showed single type, including type I (30%), type IV (24%), type II (18%), type V (14%) and type III (2%). 6 isolates showed two types, III+IV (n= 2), II+V (n=2), IV+V (n=1) and type I+V (n=1). CONCLUSION: In conclusion, to the best of our knowledge, this is the first study in India to study the distribution of antibiotic resistant genes and SCCmec types among MR-CoNS from community settings. This study highlights high prevalence of MR-CoNS in community and its role in harbouring genetically diverse SCCmec elements as antibiotic resistance determinant.
OBJECTIVE: The study was designed to find the distribution of SCCmec types and the various antibiotic resistance genes amongst MR-CoNS isolates from asymptomatic individuals. MATERIALS AND METHODS: A total of 145 nasal swabs were collected from asymptomatic healthy individuals from community settings. Identification and speciation of CoNS were done by standard biochemical methods. Screening of methicillin resistance (mecA gene) and detection of various antibiotic resistant genes were done using multiplex PCR method. SCCmec types (I - V) were determined using multiplex PCR. RESULTS: 50 (44.6%) isolates were found to be methicillin resistant both by cefoxitin method and multiplex PCR. S. epidermidis (40%) was the predominant species followed by S. haemolyticus (28%), S. hominis (20%) and S. warneri (12%). Highest resistance was shown for cotrimoxazole (26%), followed by ciprofloxacin (24%), tetracycline (20%), erythromycin (18%), fusidic acid (10%) and mupirocin (6%). Among SCCmec types, 44 isolates showed single type, including type I (30%), type IV (24%), type II (18%), type V (14%) and type III (2%). 6 isolates showed two types, III+IV (n= 2), II+V (n=2), IV+V (n=1) and type I+V (n=1). CONCLUSION: In conclusion, to the best of our knowledge, this is the first study in India to study the distribution of antibiotic resistant genes and SCCmec types among MR-CoNS from community settings. This study highlights high prevalence of MR-CoNS in community and its role in harbouring genetically diverse SCCmec elements as antibiotic resistance determinant.
Authors: Elvira Garza-González; Daniel López; Cesar Pezina; Walter Muruet; Virgilio Bocanegra-García; Ivan Muñoz; Camilo Ramírez; Jorge M LLaca-Díaz Journal: J Med Microbiol Date: 2009-12-10 Impact factor: 2.472
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Authors: Gabriella Marincola; Olivia Liong; Christoph Schoen; Alaa Abouelfetouh; Aisha Hamdy; Freya D R Wencker; Tessa Marciniak; Karsten Becker; Robin Köck; Wilma Ziebuhr Journal: Front Public Health Date: 2021-06-17