Background: Head lice infestation caused by Pediculus humanus var capitis (Pediculus capitis) is a worldwide public health concern that affects mostly school aged children. This descriptive, analytical study was carried out in 2008 to determine the prevalence of pediculosis capitis and some risk factors among primary-school pupils in Bahar, Hamadan Province, Iran.
Methods: We selected 900 pupils (50% girls and 50% boys) from 18 primary schools by multistage, systematic random sampling. Their hair was examined for head louse infestation. The results and demographic information recorded in the questionnaire and then were analyzed by SPSS software.
Results: Twelve students (1.3%) were infected with lice, 10 (2.2%) girls and 2 (0.44%) boys. The rate of infection was 0.66% in urban and 1.66% in rural areas. The results showed significant variations in head lice infestation, and factors such as sex, level of parent education and habitat (P 0.05).
Conclusions: The prevalence of pediculosis was less than average percentages observed in other students inside and outside Iran. We recommend that the parents and teachers should receive training about the danger of infection and its distribution in family and school in order to prevent it.
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Vet Med Sci
January 2025
Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.
Background: Parasites are a major concern for profitable poultry production worldwide as they impede the health, welfare and production performance of poultry.
Objectives: The present study was designed to detect the diversity of parasitic fauna and associated factors of gastrointestinal (GI) helminths and lice in indigenous chickens.
Methods: A total of 310 indigenous chickens were collected from different villages at Gauripur and Mymensingh Sadar, Mymensingh, and Bangladesh, and various parasites were identified.
Pathogens
December 2024
Department of Medical Microbiology, Acibadem University School of Medicine, Istanbul 34752, Türkiye.
Head lice infestation (HLI), caused by De Geer, 1767, has long been a common global problem of school children. Permethrin is an old pyrethroid derivative that has been used commonly for its treatment, and it exerts its activity over the voltage-sensitive calcium channels (VSCC) of the lice. There has been a growing list of persistent HLI cases lately in the world among patients using permethrin, and knockdown resistance (kdr)-related point mutations on VSCC have been identified and reported from those resistant lice samples.
View Article and Find Full Text PDFPathogens
December 2024
Public Health Agency of Canada, Winnipeg, MB R3E 3R2, Canada.
is a body-louse-borne bacterium. Canadian disease has been reported primarily in populations experiencing homelessness and in Indigenous communities with limited access to water. We sought to understand the epidemiology of in Canada.
View Article and Find Full Text PDFJ Aquat Anim Health
December 2024
Department of Health Management and Centre for Veterinary Epidemiological Research, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada.
Objective: The primary objective was to construct a time series model for the abundance of the adult female (AF) sea lice Lepeophtheirus salmonis in Atlantic Salmon Salmo salar farms in the Bay of Fundy, New Brunswick, Canada, for the period 2016-2021 and to illustrate its short-term predictive capabilities.
Methods: Sea lice are routinely counted for monitoring purposes, and these data are recorded in the Fish-iTrends database. A multivariable autoregressive linear mixed-effects model (second-order autoregressive structure) was generated with the outcome of the abundance of AF sea lice and included treatments, infestation pressures (a measure that represents the dose of exposure of sea louse parasitic stages to potential fish hosts) within sites (internal) and among sites (external), and other predictors.
J Parasitol
November 2024
Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Library of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, 105 Xingang West Road, Haizhu District, Guangzhou 510260, Guangdong Province, China.
Cospeciation has been observed multiple times between parasites and their hosts. Here we compare the phylogeny of 2 different groups of chewing lice (Phthiraptera), one known for being host specific (Amblycera: Myrsidea) and one known for including many generalist species (Ischnocera: Brueelia-complex, specifically Guimaraesiella and Priceiella) with that of their songbird hosts (Passeriformes), which are participants in mixed-species feeding flocks in South China. Using event- (Jane) and distance-based (ParaFit) analyses we found that both groups of lice have phylogenies that are more similar than by chance to those of their hosts.
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