ABSTRACT
The prevalence and human risk factors associated with head lice infestation was studied. A total of 860 children, 474 [55.1%] boys and 386 [44.9%] girls, with ages ranged from 6-13 years were critically examined. They were randomly selected from two schoolchildren [one for boys and one for girls] in Jazan Province. The children or their parents were subjected to questionnaire and physical examination by visual inspections of scalp and hair for the presence of adult lice, nymphs, and/or eggs [nits]. A total of 114 children [13.3%] were infested with head lice, 73 [18.9%] girls and 41 [8.6%] boys. The highest infestation rate was recorded in rural area [20.5%]. Pediculosis had a negative association with father's education level and frequency of hair washing [p>0.01]. The results indicated that rural residence, sex, long hair, age-group 6-<8 years old, positive history of previous infestation, sharing of beds and combs, uneducated mother and family overcrowding might be the risk factors for the head lice infestation
Subject(s)
Humans , Male , Female , Pediculus/parasitology , Child , Schools , Surveys and Questionnaires , Lice Infestations/prevention & controlABSTRACT
Un paciente, adulto, masculino, presentaba al momento de la consulta una severa infestación por Pediculus humanus capitis y una lesión en la cabeza de donde emergían larvas. El material extraído de la herida del paciente correspondió a Cochliomyia hominivorax. En este caso clínico, las lesiones producidas por el rascado del propio paciente permitieron atraer moscas C. hominivorax las que depositaron sus huevos en ellas de donde eclosionaron sus larvas que ocasionaron la miasis cutánea.
Subject(s)
Humans , Male , Adult , Lice Infestations/complications , Myiasis , Pediculus/parasitology , Screw Worm Infection , Argentina , Diptera/parasitology , Risk FactorsABSTRACT
El problema de la pediculosis capitis fue estudiado en 7.312 niños procedentes de 28 escuelas del Area Metropolitana de San José, Costa Rica., mediante observación al ojo desnudo (NEO). De los casos presuntivos se tomó un muestra de cabello o de los supuestos parásitos. Este material fue aclarado y montado en medio Hoyer para su posterior observación microscópica. Se encontraron, 730 (10,0 por ciento) niños positivos al menos por una de las siguientes formas parasitarias: huevos eclosionados o no eclosionados, ninfas y adultos de P. humanus capitis. 590 (80,8 por ciento) de los positivos fueron niñas y 140 (19,2 por ciento) fueron niños. Las tasas de prevalencia observadas en las escuelas estudiadas mostraron valores entre el 3,2 y el 27,2 por ciento.
Subject(s)
Child , Ectoparasitic Infestations/epidemiology , Lice Infestations , Pediculus/parasitology , Costa Rica , School Health Services , Social ConditionsABSTRACT
During 1985, 50,356 children and adolecents from 105 public schools of Belo Horizonte, Minas Gerais State were questioned about or examined for head lice (Pediculus capitis). The mean prevalence of pediculosis, obtainde from the questionnaires and sometimes confirmed by head inspections, was 7.7% or else 10.2% when adjusted to 38,311 respondents. Current and past infestations combined - within a period of three months before survey - revealed a total prevalence of 57.4%. Significant differences were observed among socioeconomic levels, and grades of school age. The more prevalent categories among the factors studied were: sex - femal: 9.2% (P<0.001); ethnic group - white: 10.0% (P<0.001); hair length - long: 9.5% (P<0.05); year age-group - 1-5 years: 19.2% (P<0.001), with a peak in the 5th year (21.3%).