Medically Important Parasites Carried by Cockroaches in Melong Subdivision, Littoral, Cameroon

Cockroaches have been recognized as mechanical vectors of pathogens that can infest humans or animals. A total of 844 adult cockroaches (436 males and 408 females) were caught. In the laboratory, cockroaches were first washed in saturated salt solution to remove ectoparasites and then rinsed with 70% alcohol, dried, and dissected for endoparasites. An overall transport rate of 47.39% was recorded. Six genera of parasites were identified. These were Ascaris (33.76%), Trichuris (11.97%), Capillaria (6.16%), Toxocara (4.86%), Hook Worm (4.86%), and Eimeria (2.73%). The parasites were more recorded on the external surface (54.27%) of cockroaches than in the internal surface (GIT, 38.51%). The same tendency was obtained between sexes with female cockroaches having a higher transport rate (36.69%). Cockroaches caught in toilets carried more parasites (31.99%) as compared to those from kitchens (22.63%) and houses (11.14%). Almost all encountered parasites were recognized as responsible of zoonosis and they can be consequently released in nature by hosts and easily disseminated by cockroaches as mechanical vectors. Sanitary education, reenforcement of worms' eradication programs, and the fight against these insects remain a necessity in the Mélong Subdivision.