[Effect of mass chemotherapy in late stage of soil-borne nematodiasis control].
OBJECTIVE
To evaluate the effects and influencing factors of mass chemotherapy in the late stage of soil-borne nematodiasis control so as to provide the evidence for the development of control programs.


METHODS
Six villages were divided into three groups: the target chemotherapy, the selective chemotherapy and the control. By observation in three consecutive years, the indexes, mass infection rates, infection degrees and re-infections of soil-borne nematodes, were compared among the 3 groups. The influencing factors were also analyzed.


RESULTS
The population infection rates of soil- borne nematodes decreased by 85.94%, 43.10% and 20.87%, respectively, in the three groups after chemotherapy compared with those before the intervention. A higher hookworm infection rate appeared and the chemotherapy effect was impacted in the target chemotherapy group, as some key population applied fresh human waste in vegetable plots. The re-infection rate was 16.65 times of the new infection rate.


CONCLUSIONS
Chemotherapy is still useful in the late stage of soil-borne nematode control. It is more important to enhance management of using manure and health education on focus population.
Jiangsu Institute of Parasite Diseases, Wuxi 214064, China
Han-Jun
HJ
Chao
Xiao-Lin
XL
Jin
Xiang-Zheng
XZ
Xu
Wen-Cai
WC
Jiang
Ming-Xue
MX
Shen
Huo-Gen
HG
Mei
Jin-Bing
JB
Gao
Hong-Kui
HK
Tai
Ye-Fang
YF
Li
Song-Ru
SR
Du
Yong-Chun
YC
Li
D000293:Adolescent; D000328:Adult; D000818:Animals; D000969:Antinematodal Agents / Q000627:therapeutic use*; D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009348:Nematoda / Q000187:drug effects / Q000502:physiology; D009349:Nematode Infections / Q000188:drug therapy* / Q000453:epidemiology / Q000469:parasitology; D012987:Soil / Q000469:parasitology*; D055815:Young Adult
D000969:Antinematodal Agents; D012987:Soil