Innovative Journal Innovative Journal of Medical and Health Science 2589-9023 4 1 2021 1 30 Estimation of risk factors affecting patients associated with bronchial asthma in Basrah, southern Iraq: Case-control observational study. 1 Falih Hmood Mezban University of Basrah, College of medicine ,Department of Microbiology, Basrah, Iraq Ihsan Edan Alsaimary University of Basrah, College of medicine ,Department of Microbiology, Basrah, Iraq Journal Article https://doi.org/10.15520/jmrhs.v4i1.304 Abstract This study aimed to describe some of the risk factors of asthma in Basra south in Iraq; The study showed that (3,5) age group population were more affected with asthma (27.9%) and the Females were more affected than males in group 2,3and 5 (6.4%,15.7% and 14.7%)respectively compared to( 4.9%, 12.3% and 13.2) .In same group of male. While There were (68.6%) of patients came from urban areas in comparison to (31.4%) of cases who came from rural areas. The Smoking patients with positive (43.1%). and well patients with animal contact positive their proportion was while (49%). Seasonal asthma attack in male (23.5%) more than female (20.6%) the perennial asthma attach was recorded in male (29%) more than female (26.9%) in this study show Asthmatic patients with other allergy about (15.7%) and with chronic diseases (31.9%). The percentage of patients with positive family history were 39.2% of the cases.