A Study of Microbial Contamination of Toilets In the Girls Doormatory in Al-Qadisiya University

Abstract

300 samples (Environmental swabs) were collected from different sites of the toilets in the girls doormatory in Al -Qadisiya University for the period: April (2008) – Desember (2008). In this study , 560 isolates of various aerobic microorganisms were collected ,the total bacterial isolates were (459), (%82) while the total Molds and Yeasts isolates were (150) , (%33). The bacterial isolates included: 309 isolates (%67) were gram negative bacteria while 150 isolates (%33) were gram positive bacteria. Enterobacteriaceae was the most common gram negative bacteria (%79) and the Enterococci was the most common gram positive bacteria (%67). There was a clear difference in the percentage of microbial contamination among the sites. The floor and air samples showed the highest growth percentage (%100) with highest count of isolates (162) and (129), while the kitchen sink samples have the lowest growth percentage (%82) with lowest count of isolates (75). On the other hand, certain tests were performed on Dettol and Sodium Hypochlorites solutions ( with the concentrations 10 , 25 & 50) mg/ml Sodium Hypochlorites had the highest prohibition effect on all the microorganisms. Pseudomonas aeruginosa was the most sensitive kind to it , While Staphylococcus aureus was the least sensitive.