title: Frequency of extended spectrum β-lactamase producing urinary isolates of Gram-negative bacilli among patients seen in a multispecialty hospital in Vellore district, India.
abstract: Extended-spectrum beta-lactamase (ESBL) producing strains of Coliform bacilli are on the rise and present a major threat especially in India. We assessed the frequency of ESBL producers among urinary isolates from patients presenting urinary tract infections. ESBL screening was done using Double Disk Synergy Test (DDST) and confirmed using E-test and Polymerase Chain Reaction (PCR). With E-test, 92.2% were positive for ESBL. In PCR, 100% strains were positive for any of the three gene targets tested. CTX-M was positive in majority of the strains followed by TEM and SHV. Two (3.22%) strains were positive for all the three genes; 21% strains were positive for both TEM and CTX-M genes. There was no statistically significant difference in the findings of E-test and PCR testing in the determination of ESBL producers (Fisher exact test P = 0.15). The strength of agreement between them was 'fair' (k = 0.252). Continuous monitoring of ESBL producers among Indian strains is important to rationalize the antibiotic policy to be followed.
authors: B
authors: B
authors: Nandagopal
authors: Sri Sakthi Amma Institute of Biomedical Research, Sri Narayani Hospital and Research Centre, Sripuram, Vellore, Tamil Nadu, India.
authors: S
authors: S
authors: Sankar
authors: K
authors: K
authors: Sagadevan
authors: H
authors: H
authors: Arumugam
authors: M V
authors: MV
authors: Jesudason
authors: K
authors: K
authors: Aswathaman
authors: A
authors: A
authors: Nair
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D005260:Female; D006090:Gram-Negative Bacteria / Q000187:drug effects / Q000201:enzymology* / Q000235:genetics / Q000302:isolation & purification; D016905:Gram-Negative Bacterial Infections / Q000453:epidemiology* / Q000382:microbiology*; D006761:Hospitals; D006801:Humans; D007194:India / Q000453:epidemiology; D007223:Infant; D008297:Male; D008826:Microbial Sensitivity Tests; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D015995:Prevalence; D014552:Urinary Tract Infections / Q000453:epidemiology* / Q000382:microbiology*; D055815:Young Adult; D001618:beta-Lactamases / Q000235:genetics / Q000378:metabolism*
chemical_list: D001618:beta-Lactamases