Genetic diversity of human head lice and molecular detection of associated bacterial pathogens in Democratic Republic of Congo

Head louse, Pediculus humanus capitis, is an obligatory blood-sucking ectoparasite, distributed worldwide. Phylogenetically, it occurs in five divergent mitochondrial clades (A –E); each exhibiting a particular ge...
Source: Parasites and Vectors - Category: Microbiology Authors: Tags: Research Source Type: research

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Abstract Gene editing offers opportunities to solve fish farming sustainability issues that presently hampers expansion of the aquaculture industry. In for example Atlantic salmon farming, there are now two major bottlenecks limiting the expansion of the industry. One is the genetic impact of escaped farmed salmon on wild populations, which is considered the most long-term negative effect on the environment. Secondly and the utmost acute problem is the fish parasite salmon lice, which is currently causing high lethality in wild salmonids due to high concentrations of the parasite in the sea owing to sea cage salmo...
Source: Transgenic Research - Category: Genetics & Stem Cells Authors: Tags: Transgenic Res Source Type: research
via Polák et al, 2019 By Christian Jarrett You may be best advised not to read this article late at night or before you eat. Psychologists at the National Institute of Mental Health and Charles University in the Czech Republic have surveyed a large sample of non-clinical volunteers to gauge their reaction to 24 creatures that are commonly the source of specific animals phobias. The results, published in the British Journal of Psychology, not only contribute to our understanding of animal phobias, but could prove incredibly useful to horror writers. Among the key findings is that spiders were unique in being both int...
Source: BPS RESEARCH DIGEST - Category: Psychiatry & Psychology Authors: Tags: Emotion evolutionary psych Mental health Source Type: blogs
Publication date: Available online 11 June 2019Source: Fish &Shellfish ImmunologyAuthor(s): Yeny Leal, Janet Velazquez, Liz Hernandez, Jaya Kumari Swain, Alianet Rodríguez Rodríguez, Rebeca Martínez, Claudia García, Yassel Ramos, Mario Pablo Estrada, Yamila CarpioAbstractThe development of vaccines employing conserved protein antigens, for instance ribosomal protein P0, has as disadvantage the high degree of identity between pathogen and host proteins due to possible induction of tolerance or auto antibodies in the host organism. To overcome this drawback, peptide-based vaccines have been de...
Source: Fish and Shellfish Immunology - Category: Biology Source Type: research
r A Abstract Human encroachment of natural habitats bears the threat of disease transmission between native and introduced species that had not come into contact before, thus promoting the spread of new diseases in both directions. This is a matter of concern especially in areas where human-wildlife contact has not been intense in the recent past. In southwest Madagascar, we collected ectoparasites from various mammalian hosts and chicken, and examined their host preferences and their prevalence in relation to season and habitat degradation. Field-work took place in the northern portion of Tsimanampetsotsa Nationa...
Source: Acta Tropica - Category: Infectious Diseases Authors: Tags: Acta Trop Source Type: research
Publication date: Available online 30 April 2019Source: Fish &Shellfish ImmunologyAuthor(s): Cristian Gallardo-Escárate, Valentina Valenzuela-Muñoz, Gustavo Núñez-Acuña, Crisleri Carrera, Ana Teresa Gonçalves, Diego Valenzuela-Miranda, Bárbara P. Benavente, Steven RobertsAbstractThe study of host-parasite relationships is an integral part of the immunology of aquatic species, where the complexity of both organisms has to be overlayed with the lifecycle-stages of the parasite and immunological status of the host. A deep understanding of how the parasite survives in its ho...
Source: Fish and Shellfish Immunology - Category: Biology Source Type: research
This study showed that although head lice are arrested around human scalp samples, they did not show differences between the human samples of different volunteers nor with the aging of the scalp sample (i.e., 60 h-old samples are as much attractive as 0 h-old samples) (Ortega Insaurralde et al., 2016). Thus, a piece of filter paper (1 cm × 1 cm) was rubbed during 30 s against the scalp of one 30-year-old female volunteer who had not bathed or used perfumed products in the 24 h previous to the extraction. Immediately after rubbing, the filter paper was located at one side of the circ...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Abstract Porcine haemoplasmosis caused by Mycoplasma suis affects the global pig industry with significant economic losses. The main transmission route of M. suis is through the blood and some haematophagous arthropods, like flies and mosquitoes, could be the vectors to this pathogen. However, the presence of M. suis in pig haematophagous ectoparasites in natural conditions has not yet been studied. The most frequent ectoparasite in pigs is the blood-sucking louse Haematopinus suis, an obligate and permanent parasite. Therefore, this work aims to study the occurrence of M. suis in H. suis samples from both domesti...
Source: Acta Tropica - Category: Infectious Diseases Authors: Tags: Acta Trop Source Type: research
A skin infection occurs when parasites, fungi, or germs such as bacteria break into the skin. Some examples of these invaders include scabies, the herpes virus, and lice. Here, learn more about skin infections and what they look like.
Source: Health News from Medical News Today - Category: Consumer Health News Tags: Dermatology Source Type: news
(University of Utah) Using host-specific parasites isolated on individual pigeon 'islands,' the scientists showed that descendants of a single population of feather lice adapted rapidly in response to preening. They found that preening drives rapid and divergent camouflage in feather lice transferred to different colored rock pigeons. Over four years and 60 generations, the lice evolved heritable color differences that spanned the full color range of the lice genus found on 300 bird species worldwide.
Source: EurekAlert! - Biology - Category: Biology Source Type: news
, Fields DM, Browman HI Abstract Chemoreception is critical for marine ectoparasites - such as salmon lice (Lepeophtheirus salmonis) - to identify and locate salmonid hosts. The molecular receptors that parasites employ to detect host-specific chemical stimuli from hosts (kairomones) have not been well characterised. In the present study, transcription of the sea louse Ionotropic receptor 25a (IR25a) was blocked to evaluate whether it functions as a chemical-perception related gene for a specific chemical cue from the Atlantic salmon host. Double-strand RNA interference (dsRNA) oligonucleotides were applied to sal...
Source: Gene - Category: Genetics & Stem Cells Authors: Tags: Gene Source Type: research
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