Prevalence and risk of occurrence of visible birth defects in mining areas in South Kivu: A hospital-based cross-sectional study.

BACKGROUND: Possible contamination related to mining activities might contribute with other risk factors in increasing the burden of birth defects (BDs) in many developing countries including the Democratic Republic of Congo. The subsequent prevalence is frequently underestimated. Implementation of focused public health interventions is hindered by the paucity of comprehensive data. We assessed the potential impact of mining on the prevalence and occurrence of visible BDs in neonates in South Kivu (SK). METHODS: A hospital-based cross-sectional study was conducted among 65,474 newborns registered in 7 hospitals in SK from 2016-2021. Hospitals were categorized based on mining activities in their respective catchment areas. Living in a mining zone was the exposure, whereas the outcome was visible BDs. Prevalence was estimated per 100,000 live births, and risk of occurrence with odds ratio (OR) and their 95% confidence interval. RESULTS: 261 neonates with visible BDs were recorded accounting for a prevalence of 399 cases per 100,000 live births. The prevalence ranges between 217 and 1365 cases per 100,000 live births. An increased risk was found in mining zones(OR=2.07; 95%CI=1.59-2.68), Mubumbano(OR=1.72, 95%CI=1.22-2.43), and Mwenga(OR=3.89, 95%CI=2.73-5.54), whereas a reduced risk was reported in non-mining zones(OR=0.48, 95%CI=0.37-0.62) in Katana (OR=0.49, 95%CI=0.33-0.73). Musculoskeletal(28.74%) and central nervous systems(19.92%) were the most common BDs. A significant difference in prevalence for BDs involving the face, GI system and abdominal wall, musculoskeletal, central nervous and genitourinary systems between mining and non-mining zones was found(p<0.001). CONCLUSION: There is an excessive risk for visible BDs in areas with hazardous mining activities in SK region.​​ More complex studies are needed to define the possible causal relationship. Moreover, findings generated herein should be corroborated by other research design, periodically monitored by public health authorities, and used to inform initiatives promoting enhanced environmental health, access to pediatric surgical care, and public health campaigns aimed at decreasing risk of BDs.

Multiple Bladder Diverticula Presenting in an 82-Year-Old Congolese Male.

Bladder diverticulum is a congenital malformation characterized by the outpouching of the bladder following an obstruction of urine flux. We present a case of 82-year-old Congolese male patient presented at our facility with a poor urinary stream and lower abdominal pain. A distended abdomen was found on physical examination while the external genitalia were normal. All blood laboratory values were found to be within normal ranges. The patient's urine analysis revealed an uncountable number of white blood cells. Ultrasonography revealed multiple diverticula in the right posterolateral and posterior wall. An ultrasound of the abdomen revealed numerous bladder diverticula in the bladder's left posterolateral and posterior aspects, mild right-sided hydronephrosis, and severe left hydronephrosis with a thinned-out cortex. Both ureters were normal. A computed tomographic (CT) scan of the abdomen confirmed the diagnosis. The patient underwent an open laparotomy which allowed complete ablation of the diverticula followed by bladder wall repair. A one-week course of antibiotics was prescribed, and the patient was discharged fully recovered with no immediate complications. Although bladder diverticula are a congenital malformation, the presence of multiple diverticula suggests that the condition is acquired. In elderly patients, open laparotomy combined with intravenous antibiotics yields positive results.