Abstract
To observe the effect of various interval mass treatment on Ascaris ova and worm positive rates and worm burden per population, 2-month, 4-month, 6-month and 12-month interval schemes were designed and applied. All of inhabitants in nine villages of Hwasung Gun, Kyunggi Do, Korea were treated from April 1977 to May 1980. Each village consisted of 100-140 people, however, there had been 20-40 drop-outs in every treatment. Pyrantel pamoate was used in dose of 10 mg/kg. Evaluation of schemes was made by examinations both for eggs and for expelled worms. The drop-outs in former treatment was included because they were few in munber. The reults obtained were summerized as follows: The pre-treatment infection status of A. lumbricoides was not significantly different between Groups; 32.5-42.2% and 33.8-46.2% in egg and worm positive rates respectively. The mean worm burdens were in range, 1.6-4.2 per infected and 0.61-1.42 per population. Twelve-month interval treatment was by no means meaningful to be adopted as a strategy of Ascaris control because egg and worm positive rates and worm burden were returned to pretreatment level. The shorter the treatment interval was, the lower the egg/worm positive rates and worm burden were. By repeating biannual, triannual and six-times-in-a-year treatments, the indices of prevalence showed the tendency of further lowering during later 2 years of follow-up. If the mass chemotherapy is adopted as a method of controlling ascariasis in a community, it should be repeated more than two times in a year to expect the gradual lowering of reinfection.
Citations
Citations to this article as recorded by
- What was the main factor in successful control of ascariasis in Korea?
Seung-Yull Cho, Sung-Tae Hong
Parasites, Hosts and Diseases.2023; 61(2): 103. CrossRef - Anthelmintic drugs for treating ascariasis
Lucieni O Conterno, Marilia D Turchi, Ione Corrêa, Ricardo Augusto Monteiro de Barros Almeida
Cochrane Database of Systematic Reviews.2020;[Epub] CrossRef - Fifty Years of the Korean Society for Parasitology
Seung-Yull Cho
The Korean Journal of Parasitology.2009; 47(Suppl): S7. CrossRef - Effect of ivermectin on infection with gastro-intestinal nematodes in Sierra Leone
J.M. Behnke, D.I. Pritchard, D. Wakelin, J.R. Park, A.M. McNicholas, F.S. Gilbert
Journal of Helminthology.1994; 68(3): 187. CrossRef - Ascariasis: indiscriminate or selective mass chemotherapy?
The Lancet.1992; 339(8804): 1264. CrossRef - Community control of Ascaris lumbricoides in rural Oyo State, Nigeria: mass, targeted and selective treatment with levamisole
S. O. Asaolu, C. V. Holland, D. W. T. Crompton
Parasitology.1991; 103(2): 291. CrossRef - Epidemiology and control of ascariasis in Korea
B S Seo
The Korean Journal of Parasitology.1990; 28(Suppl): 49. CrossRef - The regulation of gastrointestinal helminth populations
Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences.1990; 330(1257): 191. CrossRef - The epidemiology of Ascaris lumbricoides and other soil-transmitted helminths in primary school children from Ile-Ife, Nigeria
Celia V. Holland, S. O. Asaolu, D. W. T. Crompton, R. C. Stoddart, R. Macdonald, S. E. A. Torimiro
Parasitology.1989; 99(2): 275. CrossRef - The prevalence of Ascariasis
D.W.T. Crompton
Parasitology Today.1988; 4(6): 162. CrossRef - The importance of host age and sex to patterns of reinfection with Ascaris lumbricoides following mass anthelmintic treatment in a South Indian fishing community
D. B. Elkins, Melissa Haswell-Elkins, R. M. Anderson
Parasitology.1988; 96(1): 171. CrossRef - Do hookworms elicit protective immunity in man?
J.M. Behnke
Parasitology Today.1987; 3(7): 200. CrossRef - The role of mathematical models in helminth population biology
Roy M. Anderson
International Journal for Parasitology.1987; 17(2): 519. CrossRef - The epidemiology and control of intestinal helminths in the Pulicat Lake region of Southern India. I. Study design and pre- and post-treatment observations on Ascaris lumbricoides infection
D.B. Elkins, M. Haswell-Elkins, R.M. Anderson
Transactions of the Royal Society of Tropical Medicine and Hygiene.1986; 80(5): 774. CrossRef - The population dynamics and epidemiology of intestinal nematode infections
Roy M. Anderson
Transactions of the Royal Society of Tropical Medicine and Hygiene.1986; 80(5): 686. CrossRef - Community control of helminth infections of man by mass and selective chemotherapy
R. M. Anderson, G. F. Medley
Parasitology.1985; 90(4): 629. CrossRef - Epidemiological studies on Ascaris lumbricoides reinfection in rural communities in Korea 1. The relationship between prevalence and monthly reinfection rate
Jong Yil Chai
The Korean Journal of Parasitology.1983; 21(2): 135. CrossRef - Effect of two-month interval mass chemotherapy on the reinfection of Ascaris lumbricoides in Korea
Byong seol Seo, Jong Yil Chai
The Korean Journal of Parasitology.1980; 18(2): 153. CrossRef - Chronologic growth pattern of Ascaris lumbrioides
Byong Seol Seo, Jong Yil Chai
The Korean Journal of Parasitology.1980; 18(2): 164. CrossRef
