A survey of breeding sites and variation of Simulium damnosum in Ini L.G.A. of Akwa Ibom, Nigeria

In the year 2001, a total of 9207 aquatic stages of Simulium damosum were collected from five group of breeding sites; (53.4%), submerged leaves 3263 (35.4%), submerged rocks 723 (7.9%), other object 210 (2.3%) and free water 95 (1.0%) in two streams. The 4556 adults captured were distinguished into 3 complexes based on morphometric methods. The Aquatic stages prevalence shows highest abundant of 1277 in October, the peak adult abundant (485) followed the aquatic stages peak by one month in November. The distinction of S. damnosum by morphometric methods provides a valuable tool in the study and control of onchocerciasis. The Nigerian Journal of Parasitology Vol. 24 2003: 149-15

Paragonimiasis

[Extract] Paragonimiasis is a zoonotic disease caused by lung flukes of the genus Paragonimus. Humans usually become infected by eating freshwater crabs or crayfish containing encysted metacercariae of these worms. However, an alternative route of infection exists: ingestion of raw meat from a mammalian paratenic host. Adult worms normally occur in pairs in cysts in the lungs from which they void their eggs via air passages. The pulmonary form is typical in cases of human infection due to P. westermani, P. heterotremus and a few other species (Table 5.1). Worms may occupy other sites in the body, notably the brain, but lung flukes have made their presence felt in almost every organ. Ectopic paragonimiasis is particularly common when infection is due to members of the P. skrjabini complex (Table 5.1). Human paragonimiasis occurs primarily in the tropics and subtropics of Asia, Africa, and the Americas, with different species being responsible in different areas (Table 5.1)

Paragonimiasis

[Extract] Paragonimiasis is a zoonotic disease caused by lung flukes of the genus Paragonimus. Humans usually become infected by eating freshwater crabs or crayfish containing encysted metacercariae of these worms. However, an alternative route of infection exists: ingestion of raw meat from a mammalian paratenic host. Adult worms normally occur in pairs in cysts in the lungs from which they void their eggs via air passages. The pulmonary form is typical in cases of human infection due to P. westermani, P. heterotremus, and a few other species (Table 5.1). Worms may occupy other sites in the body, notably the brain, but lung flukes have made their presence felt in almost every organ. Ectopic paragonimiasis is particularly common when infection is due to members of the P. skrjabini complex (Table 5.1). Human paragonimiasis occurs primarily in the tropics and subtropics of Asia, Africa, and the Americas, with different species being responsible in different areas (Table 5.1)