Correlation Between Gram Negative Bacterial Colonization, Environmental Contamination and the Development of Infections at Intensive Care Unit: Colonization and Environmental Contamination in Intensive Care Unit. Pakistan Journal of Scientific & Industrial Research. 2024;67(3):232-239. Accessed March 7, 2026. https://biostaging.pjsir.org/index.php/biological-sciences/article/view/3085