Microbiological surveillance of operation theatres of a tertiary care hospital in Mizoram, north eastern part of India: 4 years retrospective analysis

Healthcare associated infections are important cause of patient morbidity and mortality. Microbiological contamination air environment in the operation theatres (OTs) major risk factor for surgical site other hospital-associated infections. To identify bacterial colonization surfaces, equipments to determine microbial OTs a tertiary care hospital Lunglei, Mizoram which is north eastern part India. Four years (January 2016 – December 2020) retrospective analysis data obtained from routine microbiological surveillance OTs. Surface samples were taken with wet swabs different sites equipments, Settle plate method Bacterial species isolated identified by conventional method. The colony forming unit (CFU) count/plate was expressed as CFU/m3 Omeliansky formula. culture positivity rate surface swab 6.4% (60/937). Bacillus spp. 45 (67.16%) isolates most common baterial isolates. counts two range 90 166 before fumigation. Staphylococcus aureus 43(42.16%) predominant least Enterococcus faecalis with13 (12.74%). one both after swabbing technique surfaces proved be valuable techniques detecting level our set up limited resources.