Characteristics of Aedes aegypti adult mosquitoes in rural and urban areas of western and coastal Kenya

• Published in: PloS one 2017-12, Vol.12 (12), p.e0189971
• Main Authors: Ndenga, Bryson Alberto, Mutuku, Francis Maluki, Ngugi, Harun Njenga, Mbakaya, Joel Omari, Aswani, Peter, Musunzaji, Peter Siema, Vulule, John, Mukoko, Dunstan, Kitron, Uriel, LaBeaud, Angelle Desiree
• Format: Article
• Language: English
• Subjects: Abundance; Aedes; Aedes - physiology; Aedes aegypti; Aging; Animals; Aquatic insects; Automation; Biology and Life Sciences; Bites; Chikungunya virus; Cities; Coastal zone; Complications and side effects; Confidence Intervals; Control programs; Culicidae; Dengue; Dengue fever; Disease control; Disease transmission; Earth Sciences; Ecosystem; Fever; Geography; Human performance; Humans; Insect bites; Kenya - epidemiology; Landing; Medical research; Medicine and Health Sciences; Mosquito Control; Mosquitoes; Outbreaks; People and Places; Public health; Rain; Rural areas; Rural Population; Towns; Traps; Tropical diseases; Urban areas; Urban Population; Vector-borne diseases; Vectors (Biology); Viral diseases; Viruses; Yellow fever; Yellow fever mosquito; Zika virus
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0189971

Aedes aegypti is the main vector for yellow fever, dengue, chikungunya and Zika viruses. Recent outbreaks of dengue and chikungunya have been reported in Kenya. Presence and abundance of this vector is associated with the risk for the occurrence and transmission of these diseases. This study aimed to characterize the presence and abundance of Ae. aegypti adult mosquitoes from rural and urban sites in western and coastal regions of Kenya. Presence and abundance of Ae. aegypti adult mosquitoes were determined indoors and outdoors in two western (urban Kisumu and rural Chulaimbo) and two coastal (urban Ukunda and rural Msambweni) sites in Kenya. Sampling was performed using quarterly human landing catches, monthly Prokopack automated aspirators and monthly Biogents-sentinel traps. A total of 2,229 adult Ae. aegypti mosquitoes were collected: 785 (35.2%) by human landing catches, 459 (20.6%) by Prokopack aspiration and 985 (44.2%) by Biogents-sentinel traps. About three times as many Ae. aegypti mosquitoes were collected in urban than rural sites (1,650 versus 579). Comparable numbers were collected in western (1,196) and coastal (1,033) sites. Over 80% were collected outdoors through human landing catches and Prokopack aspiration. The probability of collecting Ae. aegypti mosquitoes by human landing catches was significantly higher in the afternoon than morning hours (P