Filariasis surveillance at the post-control stage in China.
Southeast Asian J Trop Med Public Health
;
1992 Sep; 23(3): 369-76
Artigo
em Inglês
| IMSEAR
| ID: sea-35622
ABSTRACT
From 1956, when filariasis control was first listed in our national program, up to 1991, a cumulative total of 677,931,521 person-time blood examinations and 217,472,045 person-time diethylcarbamazine treatments were made in the whole country, and 835 (96.6%) out of the 864 endemic counties achieved the criterion for control of filariasis. Surveillance data collected in various provinces, autonomous regions and municipalities starting from the second year after they reached the criterion for control of filariasis demonstrated that in 1991 the microfilarial rate in human populations and natural infection of filarial larvae in mosquito vector populations in previous endemic areas had already declined to a very low level, even zero, without resurgence in quite a number of villages. In some places where filariasis was brought under control relatively early, the anti-filarial antibody positive rate of the human population has fallen to a level the same as or similar to that in nonendemic areas. Therefore, the data suggest that in most places where filariasis has been controlled, the transmission of bancroftian filariasis and periodic malayan filariasis has been interrupted. However, filariasis is still endemic in 29 counties in China at present, the danger of introduction of sources of infection by the floating population hasn't been extinguished yet, and there are still a few areas with weak links in filariasis control. Therefore, control work still needs to be strengthened and systematic surveillance must be pursued until the elimination of filariasis in the whole country.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
População Rural
/
Brugia
/
Humanos
/
Anticorpos Anti-Helmínticos
/
Estudos Soroepidemiológicos
/
China
/
Vigilância da População
/
Filariose
/
Insetos Vetores
/
Animais
Tipo de estudo:
Estudo de rastreamento
País/Região como assunto:
Ásia
Idioma:
Inglês
Revista:
Southeast Asian J Trop Med Public Health
Ano de publicação:
1992
Tipo de documento:
Artigo
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