scholarly journals Molecular survey of head lice (Pediculus humanus capitis) infestation among disadvantaged children in Klang Valley, Malaysia

2021 ◽  
Vol 38 (4) ◽  
pp. 590-593
Author(s):  
Mokhtar A.S.
Keyword(s):  
Head Lice ◽  
Pediculus Humanus Capitis ◽  
Disadvantaged Children ◽  
Pediculus Humanus ◽  
Molecular Survey ◽  
Klang Valley

MOLECULAR STUDY OF HUMAN HEAD LICE, PEDICULUS HUMANUS CAPITIS COMPARISON WITH GOAT SUCKING LICE, LINOGNATHUS STENOPSIS (BURMEISTER) STRAINS

2020 ◽  
pp. 132-139
Keyword(s):  
Genetic Difference ◽  
Human Head ◽  
Molecular Study ◽  
Head Lice ◽  
Pediculus Humanus Capitis ◽  
School Students ◽  
Pediculus Humanus ◽  
Sucking Lice ◽  
Pcr Products ◽  
Amplicon Size

In this study, only (122) out of (915) primary school students were shown to be infected with head lice Pediculus. humanus capitis. The number and percentage of infected males were 46 (11.3%), while the number and percentage of infected females were 76 (14.9%). The results in our study also showed that the number and percentage of goats infected with goat sucking lice, Linognathus stenopsis was 70 (21.7%) of the total 322 animals, with the highest number and percentage among female goats 44 (62.9%) compared to the male goats 26 (37.1%). The study demonstrated that the rate of genetic difference between the studied samples was 89% and the similarity rate was 11%. Detection of OP-K01 gene pieces by PCR products showed that the amplicon size was 520 bp for P. humanus capitis isolated from humans, while the detection of OP-E20 and OP-M05 gene pieces with PCR product showed the lowest amplicon size 230 bp for Linognathus stenosis isolated from goats.

scholarly journals Do drowning and anoxia kill head lice?

Parasite ◽  
2018 ◽  
Vol 25 ◽  
pp. 8 ◽  
Author(s):  
Kerdalidec Candy ◽  
Sophie Brun ◽  
Patrick Nicolas ◽  
Rémy Durand ◽  
Remi N. Charrel ◽  
...  
Keyword(s):  
Survival Rate ◽  
Respiratory System ◽  
Water Immersion ◽  
Control Group ◽  
Head Lice ◽  
Pediculus Humanus Capitis ◽  
Untreated Control Group ◽  
Pediculus Humanus ◽  
Hot Air ◽  
Mechanical Methods

Chemical, physical, and mechanical methods are used to control human lice. Attempts have been made to eradicate head lice Pediculus humanus capitis by hot air, soaking in various fluids or asphyxiation using occlusive treatments. In this study, we assessed the maximum time that head lice can survive anoxia (oxygen deprivation) and their ability to survive prolonged water immersion. We also observed the ingress of fluids across louse tracheae and spiracle characteristics contrasting with those described in the literature. We showed that 100% of lice can withstand 8 h of anoxia and 12.2% survived 14 h of anoxia; survival was 48.9% in the untreated control group at 14 h. However, all lice had died following 16 h of anoxia. In contrast, the survival rate of water-immersed lice was significantly higher when compared with non-immersed lice after 6 h (100% vs. 76.6%, p = 0.0037), and 24 h (50.9% vs. 15.9%, p = 0.0003). Although water-immersed lice did not close their spiracles, water did not penetrate into the respiratory system. In contrast, immersion in colored dimeticone/cyclomethicone or colored ethanol resulted in penetration through the spiracles and spreading to the entire respiratory system within 30 min, leading to death in 100% of the lice.

scholarly journals Pediculosis among the children of different social status in Dhaka

2013 ◽  
Vol 40 (2) ◽  
pp. 175-181
Author(s):  
Mt Tahmina Karim ◽  
Sharmin Musa ◽  
Hamida Khanum
Keyword(s):  
Socioeconomic Status ◽  
Social Status ◽  
Social Classes ◽  
Head Lice ◽  
Pediculus Humanus Capitis ◽  
Pediculus Humanus ◽  
Head Lice Infestation

The prevalence of head lice (Pediculus humanus capitis) infestation was studied among the children (1 to 7 years) in the area of Mirpur Bihari Camp, Mirpur-11, Dhaka. A total of 300 children was examined from February 2011 to January 2012 and 59.67% prevalence of head lice infestation was observed. The prevalence of pediculosis was significantly higher (p<0.05) in seven years aged children and the prevalence was significantly (p<0.05) higher in girls (72.62%) than boys (43.18%). School going children had higher (p<0.05) prevalence compared to preschool group. According to socioeconomic status, head lice infestation occurred almost equally in all social classes. DOI: http://dx.doi.org/10.3329/bjz.v40i2.14310 Bangladesh J. Zool. 40(2): 175-181, 2012

Genetic Diversity of Pediculus humanus capitis (Phthiraptera: Pediculidae) in Peninsular Malaysia and Molecular Detection of Its Potential Associated Pathogens

2019 ◽  
Vol 57 (3) ◽  
pp. 915-926
Author(s):  
Aida Syafinaz Mokhtar ◽  
Yee Ling Lau ◽  
John-James Wilson ◽  
Noraishah Mydin Abdul-Aziz
Keyword(s):  
Genetic Diversity ◽  
Dna Barcoding ◽  
Pathogenic Bacteria ◽  
Peninsular Malaysia ◽  
Molecular Evidence ◽  
Head Lice ◽  
Pediculus Humanus Capitis ◽  
Accurate Identification ◽  
Pediculosis Capitis ◽  
Pediculus Humanus

Abstract Pediculosis capitis caused by Pediculus humanus capitis (De Geer) is endemic all over the world, and children are mostly affected, particularly those living in overcrowded institutions. Several studies have shown that P. h. capitis carried human pathogenic bacteria, suggesting the potential role of head lice in the transmission of pathogens to humans. In this study, we determined the genetic diversity of head lice collected from welfare homes sheltering underprivileged children by using DNA barcoding and demonstrated the presence of Acinetobacter spp., Serratia marcescens, and Staphylococcus aureus in head lice, which have never been investigated before in Malaysia. Cox1 DNA barcoding identified the head lice, P. h. capitis collected from welfare homes across two geographical areas of Peninsular Malaysia as belonging to clades A, B, and D. Acinetobacter bacteria: Acinetobacter guillouiae, Acinetobacter junii, Acinetobacter baumannii, and Acinetobacter nosocomialis were detected in head lice belonging to clades A and also D. In addition, DNA from S. marcescens and S. aureus were also detected in both clades A and D. To our knowledge, this is the first report on the genetic diversity of head lice in Malaysia through DNA barcoding, as well as the first to provide molecular evidence on the type of bacteria occurring in head lice in Malaysia. It is anticipated that the DNA barcoding technique used in this study will be able to provide rapid and accurate identification of arthropods, in particular, medically important ectoparasites.

scholarly journals Molecular Analysis of aparaSodium Channel Gene from Pyrethroid-Resistant Head Lice,Pediculus humanus capitis(Anoplura: Pediculidae)

2003 ◽  
Vol 40 (4) ◽  
pp. 468-474 ◽  
Author(s):  
Takashi Tomita ◽  
Noboru Yaguchi ◽  
Minoru Mihara ◽  
Masakazu Takahashi ◽  
Noriaki Agui ◽  
...  
Keyword(s):  
Molecular Analysis ◽  
Head Lice ◽  
Pediculus Humanus Capitis ◽  
Pediculus Humanus ◽  
Channel Gene

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.

Comparative efficacy of commercial combs in removing head lice (Pediculus humanus capitis) (Phthiraptera: Pediculidae)

2012 ◽  
Vol 112 (3) ◽  
pp. 1363-1366 ◽  
Author(s):  
Anabella Gallardo ◽  
Ariel Toloza ◽  
Claudia Vassena ◽  
María Inés Picollo ◽  
Gastón Mougabure-Cueto
Keyword(s):  
Head Lice ◽  
Pediculus Humanus Capitis ◽  
Comparative Efficacy ◽  
Pediculus Humanus
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