Microbial Burden of Door Handles and Lift Buttons in Government Buildings in Owerri, Imo State

High-touch surfaces in public government buildings constitute potential fomites for the transmission of pathogens, yet this risk is rarely quantified in Nigerian institutional environments where cleaning standards are inconsistent. This study assesses the microbial burden of door handles and lift buttons in selected government buildings in Owerri, Imo State, South East Nigeria. Swab samples were collected from 120 surface points across five government ministries and the Imo Government House complex before and after daily cleaning. Samples were cultured on nutrient agar, blood agar, and MacConkey agar, with colony counts and organism identification by standard biochemical methods. Total bacterial counts on door handles before cleaning ranged from 1.2 x 103 to 6.4 x 105 cfu/cm2, exceeding standard hospital environmental benchmarks in 55 percent of samples. Staphylococcus aureus was the most prevalent pathogenic isolate (46 percent), followed by Klebsiella species (19 percent) and Bacillus species (28 percent). Post-cleaning counts showed only a 40 percent average reduction, suggesting that cleaning procedures used were insufficiently disinfectant. Lift buttons yielded consistently higher counts than door handles, attributed to smaller surface area and higher contact frequency. The study recommends scheduled surface disinfection with alcohol-based agents, installation of hand sanitiser dispensers at entrances, and surface hygiene guidelines for government facility management in Imo State. Keywords: fomite contamination, door handles, Staphylococcus aureus, public buildings, Owerri