Study of @entity6565 to determine important factors involved in its ecology was carried out on Che Ju Island for three consecutive years from 1968 to 1970 in seven villages, three coastal villages and four islets remote from the main island. One village which was located in mountainous area far from the coast was surveyed to serve as control area. About 90% of population inhabiting the study area had at least one blood smear during the three-year period; about one third had three blood smears, and a little over one third had two, and the rest only one examination. Animal and mosquito surveys were carried out at the same period. Followings are the results obtained: 1. All @entity1 cases but several had microfilariae identical to the description of @entity2757 . The several cases who had morphologically different microfilariae from that of @entity2757 need further study for definite conclusion. 2. Five @entity1 randomly sampled from Mf positives and bled every two hours demonstrated nocturnal periodicity between 9 p.m. and 3 a.m. 3. @entity1 is considered to be only reservoir host for @entity1 @entity6565 in the area since animal survey and experimental exposure to the infective larvae of @entity1 filaria species showed failure to infect animals. 4. Microfilaria rate, microfilaria density, prevalence of @entity28802 varied by area and age with correlation, which indicated cumulative process of the parasite by repeated exposure and development of host immunity to certain extent. 5. Clinical manifestation of @entity6565 (symptom complex and @entity28802 ) taken from history and inspection was low in its prevalence with range of 0.9% 11.8% of total population. Only 5.2% of 517 Mf positives had the clinical manifestation. 24.8% of 109 @entity1 with clinical manifestation had microfilaria; 42.9% with symptom complex only, 23.1% with both symptoms and @entity28802 , and none with @entity28802 only were microfilaria positive. 6. Ae. togoi was the only species infected with the filaria. Mosquito infection rate by area showed positive correlation to the Mf rate and density of @entity1 population; where the Mf rate and density were high, the mosquito infection rate also high.

Ecology of XXXX on Che Ju Island.

@entity1 :: ('9606', 'Species') :: ['human', 'Human', 'persons'] @entity6565 :: ('MESH:D005368', 'Disease') :: ['filariasis'] @entity28802 :: ('MESH:D004604', 'Disease') :: ['elephantiasis'] @entity2757 :: ('6279', 'Species') :: ['B. malayi']
@entity6565 :: (MESH:D005368,Disease) :: ['filariasis']
