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Condition: Lice
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Total 27 results found since Jan 2013.
Effect of Environmental Conditions and Toxic Compounds on the Locomotor Activity of Pediculus humanus capitis (Phthiraptera: Pediculidae)
In this work, we evaluated the effect of environmental variables such as temperature, humidity, and light on the locomotor activity of Pediculus humanus capitis. In addition, we used selected conditions of temperature, humidity, and light to study the effects of cypermethrin and N,N-diethyl-3-methylbenzamide (DEET) on the locomotor activity of head lice. Head lice increased their locomotor activity in an arena at 30°C compared with activity at 20°C. When we tested the influence of the humidity level, the locomotor activity of head lice showed no significant differences related to humidity level, both at 30°C an...
Source: Journal of Medical Entomology - September 11, 2015 Category: Biology Authors: Ortega-Insaurralde, I., Toloza, A. C., Gonzalez-Audino, P., Mougabure-Cueto, G. A., Alvarez-Costa, A., Roca-Acevedo, G., Picollo, M. I. Tags: Vector Control, Pest Management, Resistance, Repellents Source Type: research
Analysis of ectoparasites (chigger mites, gamasid mites, fleas and sucking lice) of the Yunnan red‐backed vole (Eothenomys miletus) sampled throughout its range in southwest China
Abstract
The Yunnan red‐backed vole Eothenomys miletus (Rodentia: Cricetidae) is an endemic rodent species and reservoir host of zoonoses in southwest China. Based on a large host sample (2463 voles collected from 39 localities between 2001 and 2013), a general analysis of four categories of ectoparasite (fleas, sucking lice, chigger mites and gamasid mites) on E. miletus across its entire range of distribution was made. This analysis identified a total of 71 895 ectoparasites belonging to 320 species (30 species of flea, 9 of sucking louse, 106 of gamasid mite and 175 of chigger mite) with a high prevalence (87%), m...
Source: Medical and Veterinary Entomology - September 1, 2015 Category: Veterinary Research Authors: P.‐Y. PENG, X.‐G. GUO, W.‐Y. SONG, P. HOU, Y.‐J. ZOU, R. FAN, X.‐S. HE Tags: Original Article Source Type: research
My Q and A With Roger Ekirch on the Way We Sleep, and How It's Changed Over the Centuries
Roger Ekirch is a professor of history at Virginia Tech and the author of At Day's Close: Night in Times Past. He is also a leading scholar on segmented sleep -- the idea that for much of history people slept into two separate chunks separated by a waking period, as opposed to a single span of sleep. In answer to my questions, he shared his insights on "normal" insomnia, how technological advances have changed the way we sleep, and why in many ways we're living in a golden age of sleep. 1) How was the waking time between the two sleeps spent? In myriad ways, from the spiritual to the profane, in addition to more mundane ta...
Source: Science - The Huffington Post - June 24, 2015 Category: Science Source Type: news
SNPs in Entire Mitochondrial Genome Sequences (≈15.4 kb) and cox1 Sequences (≈486 bp) Resolve Body and Head Lice From Doubly Infected People From Ethiopia, China, Nepal, and Iran But Not France
Source: Journal of Medical Entomology - November 16, 2014 Category: Biology Authors: Xiong, H.Campelo, D.Boutellis, A.Raoult, D.Alem, M.Ali, J.Bilcha, K.Shao, R.Pollack, R. J.Barker, S. C. Tags: Molecular Biology/Genomics Source Type: research
Evidence that clade A and clade B head lice live in sympatry and recombine in Algeria
Abstract
Pediculus humanus L. (Psocodea: Pediculidae) can be characterized into three deeply divergent lineages (clades) based on mitochondrial DNA. Clade A consists of both head lice and clothing lice and is distributed worldwide. Clade B consists of head lice only and is mainly found in North and Central America, and in western Europe and Australia. Clade C, which consists only of head lice, is found in Ethiopia, Nepal and Senegal. Twenty‐six head lice collected from pupils at different elementary schools in two localities in Algiers (Algeria) were analysed using molecular methods for genotyping lice (cytochrome b and ...
Source: Medical and Veterinary Entomology - September 1, 2014 Category: Veterinary Research Authors: A. BOUTELLIS, I. BITAM, K. FEKIR, N. MANA, D. RAOULT Tags: Short Communication Source Type: research
Life history parameters of the cattle long‐nosed sucking louse, Linognathus vituli
Abstract
Cattle sucking lice, Linognathus vituli (L.) (Phthiraptera: Linognathidae), were obtained from naturally infected cattle and maintained within ‘arenas’ affixed to the backs of cattle confined in controlled environment chambers maintained at a constant temperature of 15 °C. Temperatures measured within the arenas at an ambient temperature of 15 °C were constant at about 34 °C and only slightly above the temperature on nearby skin. The effect of temperature on egg development was determined using a gradient of temperatures between 25 °C and 41 °C. Eggs did not develop at temperatures of < 26...
Source: Medical and Veterinary Entomology - May 29, 2014 Category: Veterinary Research Authors: D. D. COLWELL Tags: Original Article Source Type: research
The best cure for head lice is ordinary hair conditioner removes nits
Research published in the Journal of Medical Entomology revealed conditioner is effective as it act as a lubricant, making it easier for the eggs to be removed.
Source: the Mail online | Health - February 26, 2014 Category: Consumer Health News Source Type: news
Ordinary conditioner removes head lice eggs as effectively as special products
(Entomological Society of America) Some shampoos and conditioners that contain chemicals or special oils are marketed as nit-removal products for head lice eggs. However, new research just published in the Journal of Medical Entomology shows that ordinary hair conditioner is just as effective.
Source: EurekAlert! - Biology - February 25, 2014 Category: Biology Source Type: news
Review of "encyclopedia of medical & veterinary entomology" by Richard Russell, Domenico Otranto & Richard Wall
This major reference examines the biology, classification and control of arthropods that cause disease in animals and humans. The morphology, taxonomy and phylogeny of fleas, flies, lice, mites, midges, mosquitoes and ticks are described, with descriptions of their medical and veterinary significance, diseases they cause, insect distribution and global disease spread. Image: Book cover.
Source: Parasites and Vectors - December 4, 2013 Category: Microbiology Authors: Basil Brooke Source Type: research
How long do louse eggs take to hatch? A possible answer to an age‐old riddle
This study aimed to resolve the question of whether some louse eggs hatch after the completion of treatment, thereby giving rise to a new infestation. Data were extracted from the records of lice collected after treatments in 20 clinical intervention trials. All datasets were eliminated except those in which only newly hatched louse nymphs were found prior to the final assessment. This excluded the possibility that new eggs were laid after the first treatment and thus any young lice found must have originated from eggs laid before the start of treatment. This identified 23 of 1895 (1.2%) records with evidence of louse nymp...
Source: Medical and Veterinary Entomology - November 7, 2013 Category: Veterinary Research Authors: I. F. BURGESS Tags: Original Article Source Type: research
The use of essential oils in veterinary ectoparasite control: a review
Abstract
There is a growing body of evidence indicating the potential value of essential oils as control agents against a range of arthropod ectoparasites, particularly lice, mites and ticks. Toxicity has been demonstrated following immersion and physical contact with treated surfaces, as well as after exposure to the vapour of these oils; the last of these factors implies that there is a neurotoxic, rather than simply a mechanical, pathway in their mode of action. However, the volatile nature of essential oils suggests that their residual activity is likely to be short‐lived. A possible advantage of essential oils over ...
Source: Medical and Veterinary Entomology - October 22, 2013 Category: Veterinary Research Authors: L. ELLSE, R. WALL Tags: Review Article Source Type: research
Control of the chewing louse Bovicola (Werneckiella) ocellatus in donkeys, using essential oils
Abstract
Infestations by lice can be a significant clinical and welfare issue in the management of large animals. The limited range of commercial pediculicides available and the development of resistance have led to the need to explore alternative louse management approaches. The results of in vitro and in vivo trials undertaken to control populations of the donkey chewing louse, Bovicola ocellatus (Piaget) (Phthiraptera: Trichodectidae) using the essential oils of tea tree (Melaleuca alternifolia) and lavender (Lavandula angustifolia) are reported here. Results of contact and vapour bioassays showed that 5% (v/v) tea tree...
Source: Medical and Veterinary Entomology - February 20, 2013 Category: Veterinary Research Authors: L. ELLSE, F. A. BURDEN, R. WALL Tags: Original Article Source Type: research
