Medical News Today: What causes head lice?

Head lice have existed on humans for thousands of years. These otherwise harmless parasites can cause itchiness and discomfort. In this article, learn about the causes of lice, which groups of people are most at risk, and what treatments are available. We also explore symptoms and when to see a doctor.
Source: Health News from Medical News Today - Category: Consumer Health News Tags: Dermatology Source Type: news

Related Links:

Doctors also prescribe it to treat head lice, scabies, and other infections caused by parasites.
Source: WebMD Health - Category: Consumer Health News Source Type: news
Humans are parasitized by three types of lice: body, head and pubic lice. As their common names imply, each type colonizes a specific region of the body. The body louse is the only recognized disease vector. H...
Source: Parasites and Vectors - Category: Microbiology Authors: Tags: Research Source Type: research
This study aims to investigate if and how habitat fragmentation affects the composition of ectoparasite communities on small mammalian hosts in two networks of dry deciduous forest fragments in northwestern Madagascar. Forest sites differing in size, proportion of edge habitat and host density were studied in the Ankarafantsika National Park and in the Mariarano region. A total of 924 individuals of two mouse lemur species, Microcebus murinus (n=200) and Microcebus ravelobensis (n=426), and two rodent species, endemic Eliurus myoxinus (n=114) and introduced Rattus rattus (n=184), were captured to assess ectoparasite infest...
Source: International Journal for Parasitology - Category: Parasitology Authors: Tags: Int J Parasitol Source Type: research
Diverse groups of ectoparasitic arthropods cause significant morbidity and mortality in most of the approximately 1.49 billion head of cattle worldwide. Hematophagous ectoparasites (ie, blood-feeding flies, myiasis-causing flies, lice, mites, ticks) are the most important in cattle. Intense use of ectoparasiticides to treat infestations can result in ectoparasite populations becoming resistant to this treatment method. Approaches integrating the use of different technologies are required to manage cattle ectoparasites effectively while addressing societal expectations regarding food safety and environmental health. Assessi...
Source: Veterinary Clinics of North America: Food Animal Practice - Category: Veterinary Research Authors: Source Type: research
Abstract Allopreening occurs when 1 bird preens another bird. The behavior is normally directed at the head and neck of the recipient, i.e., regions that the bird cannot self-preen. Studies of penguins, pigeons, and other groups of birds suggest that allopreening plays a role in the control of ectoparasites, such as ticks and feather lice. However, it is not known whether allopreening increases in response to increases in parasite load, or whether it is a programmed response that occurs independently of parasite load. We conducted a laboratory experiment using wild-caught rock pigeons (Columba livia) to test the r...
Source: The Journal of Parasitology - Category: Parasitology Authors: Tags: J Parasitol Source Type: research
(American Chemical Society) For hundreds of years, practitioners of traditional Chinese medicine have used an herb called Stemona sessilifolia as a remedy for parasitic infections, such as those caused by pinworms and lice. Now, researchers reporting in ACS' Journal of Agricultural and Food Chemistry have identified 10 compounds that might be responsible for the herb's effectiveness. But there's a twist: The insecticides are produced by symbiotic microbes that live within the plant's cells -- not by S. sessilifolia itself.
Source: EurekAlert! - Biology - Category: Biology Source Type: news
Pediculus humanus is an obligate bloodsucking ectoparasite of human that includes two ecotypes, head louse and body louse, which differ slightly in morphology and biology, but have distinct ecologies. Phylogenetically, they are classified on six mitochondrial clades (A, B, C, D, E, and F), head louse encompasses the full genetic diversity of clades, while body louse belongs to clades A and D. Recent studies suggested that not only body louse, but also head louse can transmit disease, which warrants greater attention as a serious public health problem. The recent sequencing of body louse genome confirmed that P. humanus has...
Source: Frontiers in cellular and infection microbiology - Category: Microbiology Source Type: research
Scientists say women who are more repulsed by lice are less likely to find beards attractivePrince Harry sports one, Justin Trudeauhas recently grown one, and Brian Blessed ’s is almost its own being. But are beards attractive? As the old adage goes: “Depends on the man, depends on the beard.”Now researchers have found there might be another factor: whether a potential partner fears there might be something living in it.Continue reading...
Source: Guardian Unlimited Science - Category: Science Authors: Tags: Men's facial hair Science UK news Fashion Source Type: news
Publication date: Available online 16 December 2019Source: Research in Veterinary ScienceAuthor(s): N. Moreira, F.L. Vicente, T.M. Sandini, E.C.L. Martinelli, P.E. Navas-Suárez, T.M. Reis-Silva, H.S. SpinosaAbstractPediculosis is a parasitic disease that is considered a serious global public health problem. It is caused by the ectoparasite that is popularly known as lice, mainly affecting children in early childhood. The most commonly used treatment to combat this parasitosis is the macrocyclic lactone ivermectin (IVM). However, the use of IVM is contraindicated in children who are younger than 5 years old or who weigh
Source: Research in Veterinary Science - Category: Veterinary Research Source Type: research
Nilsen The salmon louse Lepeophtheirus salmonis is a parasite of Atlantic salmon and other salmonids. Every year, it causes high costs for the Norwegian aquaculture industry. While the morphology of the female genital tract has been described, knowledge of the molecular basis of reproduction is very limited. We identified nine genes which are expressed exclusively in the female cement gland, the organ responsible for cement production, which is used to hold the eggs together and keep them attached to their mother in egg strings. Six of these genes encode proteins with signal peptides and probably form the main componen...
Source: Genes - Category: Genetics & Stem Cells Authors: Tags: Article Source Type: research
More News: Dermatology | Health | Learning | Lice | Parasitic Diseases | Parasitology | Skin | Universities & Medical Training