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1.
Rev. Inst. Med. Trop. Säo Paulo ; 53(6): 325-327, Nov.-Dec. 2011. tab
Article in English | LILACS | ID: lil-608550

ABSTRACT

We conducted an analytical cross-sectional survey to estimate the prevalence of and factors associated with active head lice infestation. In total 140 children, aged 6 to 16-years, from a public school in rural Yucatan, Mexico, were examined by wet-combing. A structured questionnaire was used to collect information on individuals and the conditions in the surrounding environment. Head lice infestation was found in 19 out of the 140 children tested (13.6 percent) and this was associated with both lower income (OR 9.9, 95 percent CI 2.15-45.79, p = 0.003) and a higher frequency of hair washing (OR 8, 95 percent CI 1.58-50, p = 0.012). Intersectoral control programs that take into account the socioeconomic differences of children should be implemented.


Foi conduzido um estudo numa escola publica de área rural em Yucatan, Mexico com o objetivo de estimar a prevalência de pediculose e fatores de risco associados. Das 140 crianças incluídas 19 (13.6 por cento) apresentaram pediculose. A infestação de piolho foi associada com baixa renda (OR 9.9, 95 por cento CI 2.15-45.79, p = 0.003) e maior frequência de lavagem de cabelos (OR 8, 95 por cento CI 1.58-50, p = 0.012). Programas intersetoriais de controle da pediculose que levam em conta as características socioeconômicas das crianças deveriam ser executados.


Subject(s)
Adolescent , Animals , Child , Female , Humans , Male , Lice Infestations/epidemiology , Pediculus , Scalp Dermatoses/epidemiology , Cross-Sectional Studies , Lice Infestations/diagnosis , Mexico/epidemiology , Prevalence , Rural Population , Socioeconomic Factors , Scalp Dermatoses/diagnosis
2.
Rev. Inst. Med. Trop. Säo Paulo ; 50(2): 121-122, Mar.-Apr. 2008. tab
Article in English | LILACS | ID: lil-482226

ABSTRACT

To compare sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of self-diagnosis for head lice infestation with visual inspection, we conducted a study in an urban slum in Brazil. Individuals were asked about active head lice infestation (self-diagnosis); we performed visual inspection and thereafter wet combing (gold standard). Of the 175 individuals included, 77 (44 percent) had an active head lice infestation. For self-diagnosis, sensitivity (80.5 percent), specificity (91.8 percent), PPV (88.6 percent) and NPV (85.7 percent) were high. Sensitivity of visual inspection was 35.1 percent. Public health professionals can use self-diagnosis as a diagnostic tool, to estimate accurately prevalence of pediculosis in a community, and to monitor ongoing intervention strategies.


Foi conduzido um estudo em uma favela urbana no Brasil com o objetivo de comparar a sensibilidade, especificidade, valor preditivo positivo (VPP) e valor preditivo negativo (VPN) do auto-diagnóstico de pediculose com a inspeção visual. Dos 175 indivíduos incluídos, 77 (44 por cento) apresentavam pediculose. Para o auto-diagnóstico, a sensibilidade (80.5 por cento), a especificidade (91.8 por cento), o VPP (88.6 por cento) e o VPN (85.7 por cento) foram altos. A sensibilidade da inspeção visual foi 35.1 por cento. Profissionais de saúde podem utilizar o auto-diagnóstico como uma ferramenta diagnóstica para estimar de forma acurada a prevalência de pediculose em uma comunidade, como também para monitorar estratégias de controle da doença.


Subject(s)
Adolescent , Adult , Aged , Animals , Child , Child, Preschool , Female , Humans , Infant , Male , Middle Aged , Lice Infestations/diagnosis , Poverty Areas , Self-Examination , Scalp Dermatoses/diagnosis , Antiparasitic Agents/therapeutic use , Ivermectin/therapeutic use , Lice Infestations/drug therapy , Pediculus , Sensitivity and Specificity , Scalp Dermatoses/drug therapy
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