Background Soil-Transmitted Helminthiasis (STHs) remains a major public health burden in developing countries, with contaminated soil acting as reservoirs of transmission. Here, we assessed the prevalence and intensity of STHs in soil samples collected from selected dumpsites across four areas in Ibadan, Oyo State, Nigeria.

Method: A total of 312 soil samples were collected across 12 dumpsites (26 per site) across four local government areas. Parasite eggs or larva recovered using sedimentation and modified Baermann techniques. Identification was done using standard microscopy. Data was analyzed using SPSS version 22. Prevalence and intensity of STHs was computed across study sites, with chi-square test, ANOVA used logistic regression used to assess association respectively. Statistical significance was set at p<0.05.

Result: Overall STH prevalence was 43.9%, with Strongyloides spp. been the most common (28.2%), followed by hookworms (13.8%) and Ascaris spp. (1.9%). Mean infection intensity was highest for Strongyloides (0.59 ± 0.95), followed by hookworms (0.22 ± 0.56) and Ascaris (0.03 ± 0.19). Prevalence was slightly higher in peri-urban (43.9%) than urban areas (40.4%) without statistical significance (p = 0.10). However, urbanity (AOR: 6.11, 95% CI: 2.24–18.00, p < 0.001) and in Ido LGA (AOR: 8.72, 95% CI: 4.29–18.60, p < 0.001) were significantly associated with contamination.

Conclusion: Our findings show that dumpsites in urban and peri-urban areas could serve as important reservoirs for STH parasites. This calls for urgent need for environmental and health educational interventions targeted at improving waste management, dissuading open defecation and scavenging practices on dumpsites.