scholarly journals Pediculosis palpebrarum initially diagnosed as blepharitis

2009 ◽  
Vol 68 (2) ◽  
Author(s):  
J. A. Ebeigbe ◽  
A. B. Osaiyuwu
Keyword(s):  
Effective Treatment ◽  
Head Louse ◽  
Signs And Symptoms ◽  
Hot Water ◽  
Pediculus Humanus Capitis ◽  
Body Louse ◽  
Pediculus Humanus ◽  
Live Specimen

Pediculosis is an infestation of lice. Eyelid involvement is uncommon, but can be caused by pediculus humanus capitis (head louse), rarely by  pediculus humanus corporis (body louse) and commonly by phthirus pubis (pubic louse). Signs and symptoms are similar to those of blepharitis. A diagnosis of any type of pediculosis requires the finding of live specimen of lice and/or a viable nit.The immediate and effective treatment of pediculosis palpebrarum is removal of the lice and nits manually with forceps and treating the patient withvaseline, twice daily for seven to ten days. Also, fomites such as pillow cases, bedsheets, towels and hats  need to be washed in hot water and dried. This is to avoid further spread of lice or reinfestation.

scholarly journals Human Lice: Body Louse, Pediculus humanus humanus Linnaeus and Head Louse, Pediculus humanus capitis De Geer (Insecta: Phthiraptera (Anoplura): Pediculidae)

EDIS ◽  
1969 ◽  
Vol 2002 (6) ◽  
Author(s):  
H. V. Weems, Jr. ◽  
Thomas R. Fasulo
Keyword(s):  
Cooperative Extension ◽  
Head Louse ◽  
Cooperative Extension Service ◽  
Extension Service ◽  
Publication Date ◽  
Original Publication ◽  
Pediculus Humanus Capitis ◽  
University Of Florida ◽  
Body Louse ◽  
Pediculus Humanus

This document is EENY-104, one of a series of the Entomology and Nematology Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date July 1999. Reviewed May 2003. https://edis.ifas.ufl.edu/in261

Identification and characterization of an esterase involved in malathion resistance in the head louse Pediculus humanus capitis

2014 ◽  
Vol 112 ◽  
pp. 13-18 ◽  
Author(s):  
Deok Ho Kwon ◽  
Ju Hyeon Kim ◽  
Young Ho Kim ◽  
Kyong Sup Yoon ◽  
J. Marshall Clark ◽  
...  
Keyword(s):  
Head Louse ◽  
Pediculus Humanus Capitis ◽  
Pediculus Humanus ◽  
Identification And Characterization

Pyrethroid Pediculicide Resistance of Head Lice in Canada Evaluated by Serial Invasive Signal Amplification Reaction

2010 ◽  
Vol 14 (3) ◽  
pp. 115-118 ◽  
Author(s):  
Danielle Marcoux ◽  
Kathleen G. Palma ◽  
Nalini Kaul ◽  
Hilliary Hodgdon ◽  
Andrea Van Geest ◽  
...  
Keyword(s):  
Allele Frequency ◽  
Signal Amplification ◽  
Head Louse ◽  
Human Head ◽  
The United States ◽  
Head Lice ◽  
Pediculus Humanus Capitis ◽  
Pediculus Humanus ◽  
S Allele ◽  
Amplification Reaction

Background: Most people in the United States and Canada with pediculosis will be treated with neurotoxic pediculicides containing pyrethrins or pyrethroids. Their widespread use led to significant resistance reported from various countries. Although treatment failures are frequently observed in Canada, the resistance frequency to pyrethroid pediculicide of human head lice (Pediculus humanus capitis) has not been determined. Objective: To determine the knockdown resistance ( kdr) allele frequency in human head louse populations in Canada. Methods: Patients infested with Pediculus humanus capitis, aged 4 to 65 years, residents of Ontario, Quebec, and British Columbia, were participants. Head lice were collected by combing and picking the enrolled subjects' hair. Lice were analyzed by serial invasive signal amplification reaction (SISAR) for genotyping the T917I mutation of lice indicating permethrin resistance. The permethrin-resistant kdr allele (R allele) frequency could then be evaluated in the head lice collected in Canada. Results: Of the head louse populations analyzed, 133 of 137 (97.1%) had a resistant (R) allele frequency, whereas only 4 of 137 (2.9%) had a susceptible (S) allele frequency. Conclusions: The 97.1% resistant (R) allele frequency in head lice from Canada could explain the treatment failures encountered with pyrethrin and pyrethroid pediculicide treatments in Canadian populations infested with Pediculus humanus capitis as the latter will not be eliminated by those pediculicides.

Natural population of the head-louse (Pediculus humanus capitis: Anoplura) on infected children in England

Parasitology ◽  
1942 ◽  
Vol 34 (2) ◽  
pp. 180-184 ◽  
Author(s):  
Kenneth Mellanby
Keyword(s):  
Natural Population ◽  
Head Louse ◽  
Pediculus Humanus Capitis ◽  
Industrial City ◽  
Pediculus Humanus

The louse populations of the heads of 93 infested children, 45 boys and 48 girls under 14 years of age from a northern English industrial city have been examined.The average number of lice per head was 14·8 for all children, 12·7 for boys and 16·8 for girls. The maximum population observed was 142.The majority of infestations (65%) were light with under 10 lice. Girls were more frequently heavily infested than boys.Most of the infestations, though light, must have been established at least for some weeks.

scholarly journals AVOIDING EXTINCTION BY MIGRATION: THE CASE OF THE HEAD LOUSE

2015 ◽  
Vol 18 (01n02) ◽  
pp. 1550010
Author(s):  
OCTAVIO CABRERA ◽  
DAMIÁN H. ZANETTE
Keyword(s):  
Empirical Data ◽  
Head Louse ◽  
Human Head ◽  
Population Fluctuations ◽  
Pediculus Humanus Capitis ◽  
Host Group ◽  
Pediculus Humanus ◽  
Biological Population ◽  
Risk Of Extinction ◽  
Spatial Domains

The possibility of spreading by migration, colonizing new spatial domains suitable for development and reproduction, can substantially relieve a biological population from the risk of extinction. By means of a realistic computational model based on empirical data, we study this phenomenon for the human head louse, Pediculus humanus capitis. In particular, we show that a lice colony infesting a single isolated host is prone to extinction by stochastic population fluctuations within an interval of several months, while migration over a relatively small group of hosts in contact with each other is enough to insure the prevalence of the infestation for indefinitely long periods. We characterize the interplay of the size of the host group with the host-to-host contagion probability, which controls a transition between extinction of the lice population and a situation where the infestation is endemic.

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