Scientists cite parasite factor in beard attractiveness debate

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

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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
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
Answer toParasite Case of the Week 560: " Back to school " pinwormThis fun image had a question in 3 parts:What is the parasite shown? Eggs ofEnterobius vermicularisWhy is this a suitable parasite for September? September is the time that kids go back to school in America, and thus are more likely to obtain easily-transmitted parasites such as pinworm and head lice. As Nema noted, pinworm is " a parasite that is transmitted efficiently at the start of the school year because the embryonated eggs easily pass from the hands (unwashed) from one child to another and can also pass through the fomites "What i...
Source: Creepy Dreadful Wonderful Parasites - Category: Parasitology Source Type: blogs
Abstract Methods to prevent parasite infestations in farmed fish are becoming widespread, yet tests of their effectiveness often lack commercial relevance and statistical power, which may lead to technology misuse. Here, we examined salmon louse infestation on Atlantic salmon in triplicate commercial snorkel louse barrier and standard cages over a 12 month production cycle. Barrier cages reduced newly settling lice on Atlantic salmon by 75%, with variability in parasite reduction over time depending upon environmental variables. The commercial, triplicate, long-term study design serves as a template to validate pe...
Source: International Journal for Parasitology - Category: Parasitology Authors: Tags: Int J Parasitol Source Type: research
Abstract: Head lice is a parasitic infestation common in children. Proper management is essential to treat lice in a safe, convenient, cost-effective, and efficacious manner. School lice policies are often antiquated and can stigmatize the child and family. Evidence-based care guidelines may significantly help families minimize the stress of lice.
Source: The Nurse Practitioner - Category: Nursing Tags: Feature: HEAD LICE Source Type: research
In this study, ectoparasitic insect fauna of rodents found across the Iran were studied, to generate an annotated checklist of fleas and lice species. Methods: Several field expeditions focused on different habitats of northeastern Iran were conducted between January 2017 and May 2018. Rodent trapping was carried out using custom-made mesh live traps and "Faragir" live traps baited mainly with scorched sunflower and gourd seeds. The trapped rodents were examined for ectoparasites on their body, and then released at their trapping point. The rodents and ectoparasite species were identified based on available k...
Source: Journal of Vector Borne Diseases - Category: Infectious Diseases Tags: J Vector Borne Dis Source Type: research
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