Yemen’s health workers race to halt latest outbreak of deadly dengue fever

Public health officials in Mukalla, Yemen's major port city, are engaged in an urgent effort to contain the spread of dengue fever, a mosquito-borne viral infection that causes fever, headaches, body aches, nausea, and potentially fatal complications. Health surveillance teams led by insect control officers systematically patrol residential neighborhoods, particularly in densely populated slums such as Al-Koud, searching for standing water and mosquito breeding sites. The teams employ specialized equipment including dippers and sample containers to collect larvae from suspected breeding grounds, which they then identify and analyze to determine appropriate control measures. Mukalla has emerged as one of Yemen's most severely affected regions for dengue fever transmission. During recent inspections, health workers discovered multiple breeding sites despite previous control campaigns conducted two months earlier that had combined public awareness initiatives, insecticide spraying, and efforts to eliminate mosquito habitats. The persistence of breeding grounds indicates that earlier interventions had limited lasting impact. Health workers identified two primary mosquito species during their surveys: Anopheles mosquitoes, which transmit malaria, and Aedes mosquitoes, which spread dengue fever. Common breeding sites included open drainage chambers with stagnant water from household air conditioning units and uncovered water storage tanks positioned outside residences. When health workers encountered breeding sites, they attempted to educate homeowners about the dangers of leaving water containers exposed and advised covering tanks as a simple preventive measure. However, efforts to engage residents proved challenging, as many households were unoccupied during morning inspection hours or residents were unavailable when workers attempted to provide guidance. The lack of community cooperation has hindered the effectiveness of control efforts, leaving identified breeding sites unaddressed until homeowners can be contacted.