[On cleanliness of hands in diminution of Ascaris lumbricoides infection in children].
OBJECTIVE
To study the relationship between cleanliness of children's hands and diminution of Ascaris lumbricoides infection.


METHODS
Before the study all persons positive for ascaris eggs in the preliminary survey were treated with albendazole. Hand-washing habit before meal and after defecation was kept in children of experimental group, but not in the control group. Kato thick smear stool examination was done once every two months for one year to compare the new infection rates in children without ascaris infection in the two groups, and the reinfection rates in the cured negative cases were also compared between them in half a month after chemotherapy.


RESULTS
All the new infection rates as well as reinfection rates of each reexamination in the experimental group were significantly lower than that of the control group (P < 0.001). Reexamination one year later showed that the ascaris infection rate of the experimental group was 35.2%, reducing by 48.5% as compared with 68.3% before the operation of the project; while ascaris infection rate of the control group was 73.7%, increasing by 78.0% as compared with 41.4% before the operation of the project.


CONCLUSIONS
Washing hands with toilet soap to keep hands clean can significantly reduce ascaris infection rate.
Xu
L Q
LQ
Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, WHO Collaborating Center for Malaria, Schistosomiasis and Filariasis, Shanghai 20025.
Xiao
D H
DH
Zhou
C H
CH
Zhang
X Q
XQ
Lan
S G
SG
Zhen
X X
XX
Zhang
W L
WL
Fu
J P
JP
Ye
B
B
Dang
H
H
Zhu
X Z
XZ
Huang
S L
SL
D001196:Ascariasis / Q000453:epidemiology / Q000517:prevention & control*; D002648:Child; D005243:Feces / Q000469:parasitology; D006235:Hand Disinfection; D006801:Humans; D015994:Incidence; D010270:Parasite Egg Count; D012008:Recurrence