Distribution of CTX-M, TEM, SHV Beta-lactamase Gene among the Klebsiella pneumoniae Clinical Isolates from Tertiary Care Centre in Palakkad, Kerala

Resistance against the routinely used antibiotics has reached a worrying level globally. Extended spectrum beta- lactamases (ESBLs) production is the major mechanism of antimicrobial resistance. These ESBLs bacteria are resistance to penicillin, cephalosporins, monobactams. TEM1&2, CTX-M, SHV are the main ESBLs genes present in Klebsiella pneumoniae, which is produced by the alteration of amino acid in the active site. The aim of this study is to determine the prevalence of ESBL genes such as bla(TEM) 1&2, bla(CTX-M) and bla(SHV). The present study was carried out from April 2019 to September 2019, a total of 121 K. pneumoniae isolates were collected and subjected to phenotypic study. Among these 19 isolated was ESBL positive, genes (bla(SHV), bla(TEM), bla(CTX-M)) were detected by conventional PCR method. bla(TEM) (100%) was the predominant gene detected flowed by CTX-M (68.42%) and SHV (57.89%). The highest level of antimicrobial resistance towards ampicillin (93.4%) followed by ceftriaxone (28.9%), cefotaxime (24.8%) and ciprofloxacin (22.3%). However, ESBL-producing isolates were showed resistance to ampicillin (100%) followed by ceftazidime (94.74%), cefotaxime (89.47%), amikacin and amoxicillin-clavulanic acid (68%). Antimicrobial resistance of bacteria is due to the genes, especially extended spectrum beta lactamase, which is widely found in members of Enterobacteriaceae. Nevertheless, there is a paucity of studies regarding the distribution of ESBL in K. pneumoniae in Palakkad Dist., Kerala. Hence the aim of the current study determines the distribution of ESBL genes in ESBL producing K. pneumoniae isolated from various clinical samples.