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Lice - Europe PMC

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Last Updated: 26 July 2022

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Impact of a health educational interventional program on reducing the head lice infestation among pupils in an elementary school of a sub-tropical region: a quasi-experimental study.

Pediculosis is a significant social issue that can be exacerbated by human head louse, Pediculus humanus capitis, and Pediculus humanus capitis. This infestation is prevalent in schools and families, and students and their parents are required to eliminate it in schools and families. This report sought to investigate the effects of a health education intervention program on reducing head lice among children of an elementary school's children. Methods In a quasi-experimental review, a total of 880 elementary school girls were tested for pediculosis in a quasi-experimental study. Conclusions The pre-intervention prevalence of pediculosis among students was 8. 4% at the beginning of the study. To 3%, a reduced incidence of pediculosis in students due to the intervention process led to a reduced incidence of pediculosis in students. A significant rise in parental knowledge was observed on the prevention program of pediculosis based on statistical analysis of questions prior and after the training in the questionnaire.

Source link: https://europepmc.org/article/MED/35850860


Independent evolution of highly variable, fragmented mitogenomes of parasitic lice.

The mitochondrial genomes of bilaterian animals are extremely conserved organs that typically consist of a single circular chromosome. However, some species of parasitic lice also have fragmented mitogenomes, in which mitochondrial genes are present on separate, circular chromosomes. Here, we combined new and existing data to help understand mitogenome fragmentation in key groups of parasitic lice. We found clear evidence that fragmented mitogenomes appeared many times within parasitic lice, and that the degree of fragmentation is extremely variable, including examples of heteroplasmic configurations. We also discovered a significant correlation between mitochondrial fragmentation and signatures of relaxed selection.

Source link: https://europepmc.org/article/MED/35804150


Examination of vertical transmission of Bartonella quintana in body lice following multiple infectious blood meals.

To recapitulate the natural pathogen acquisition process, we conducted a series of controlled laboratory experiments to investigate the presence of B. quintana on the surface of and inside eggs that were included in multiple infectious blood meals. B. quintana DNA can be detected from the surface of eggs by qPCR for vertical transfer of infectious feces to the egg sheath during or after oviposition, according to our findings.

Source link: https://europepmc.org/article/MED/35803580


Phylogenomics reveals the origin of mammal lice out of Afrotheria.

Three of the key lineages of placental mammal lice had a common ancestor, according to the evolutionary tree of lice. In addition, reconstructions of the ancestral host group for all parasitic lice for an avian ancestral host, showing that the ancestor of Afrotheria acquired these parasites from an ancient avian host. These findings shed fresh light on the long-standing mystery of why the main groups of parasitic lice are not evenly distributed in mammals and reveal the origins of mammalian lice.

Source link: https://europepmc.org/article/MED/35788706

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions