scholarly journals Response of body lice, Pediculus humanus humanus, L., to blackbody radiation; with notes on their antennal morphology /

1971 ◽  
Author(s):  
Alberto Bolivar Broce
Keyword(s):  
Blackbody Radiation ◽  
Pediculus Humanus ◽  
Body Lice

The influence of nutrition on egg-production and longevity in unmated female body-lice (Pediculus humanus corporis: Anoplura)

Parasitology ◽  
1941 ◽  
Vol 33 (1) ◽  
pp. 40-46 ◽  
Author(s):  
A. J. Haddow
Keyword(s):  
Female Body ◽  
Egg Production ◽  
Egg Laying ◽  
The Body ◽  
Unmated Female ◽  
Pediculus Humanus ◽  
The Third ◽  
Significant Difference ◽  
The Mean ◽  
Body Lice

1. Isolated unmated female body-lice were worn in pillboxes between the skin and the clothes. They were kept constantly on the body but, by a simple device, groups of ten were permitted feeding periods of different length. These groups were fed for 4, 8, 12, 16, 20 and 24 hr. per day respectively. Another group of ten were never allowed to feed after the last moult.2. Some of the figures for egg yield were high. Lice in the 24 hr. group were able to maintain a rate of ten eggs per day for 4−5 days at a time.3. No significant difference in longevity or rate of egg-laying was found to exist between the 12, 16, 20 and 24 hr. groups nor between the 4 and 8 hr. groups but a pronounced and significant difference exists between the 8 and 12 hr. groups. Below 12 hr. there is a sharp fall in longevity and rate of egg production. The unfed group all died, without laying, on the third day.4. The rate of laying as shown by the mode increases progressively with increase in time allowed daily for feeding.5. With regard to the mean eggs per louse the position is less clear. It is felt that the 24 hr. group may differ significantly from the 12, 16 and 20 hr. groups but this is uncertain.

scholarly journals Human ectoparasites and the spread of plague in Europe during the Second Pandemic

2018 ◽  
Vol 115 (6) ◽  
pp. 1304-1309 ◽  
Author(s):  
Katharine R. Dean ◽  
Fabienne Krauer ◽  
Lars Walløe ◽  
Ole Christian Lingjærde ◽  
Barbara Bramanti ◽  
...  
Keyword(s):  
Bayesian Inference ◽  
Compartmental Model ◽  
Human Populations ◽  
Black Death ◽  
Pediculus Humanus ◽  
Pulex Irritans ◽  
Transmission Pathways ◽  
Multiple Transmission ◽  
Better Than ◽  
Body Lice

Plague, caused by the bacterium Yersinia pestis, can spread through human populations by multiple transmission pathways. Today, most human plague cases are bubonic, caused by spillover of infected fleas from rodent epizootics, or pneumonic, caused by inhalation of infectious droplets. However, little is known about the historical spread of plague in Europe during the Second Pandemic (14–19th centuries), including the Black Death, which led to high mortality and recurrent epidemics for hundreds of years. Several studies have suggested that human ectoparasite vectors, such as human fleas (Pulex irritans) or body lice (Pediculus humanus humanus), caused the rapidly spreading epidemics. Here, we describe a compartmental model for plague transmission by a human ectoparasite vector. Using Bayesian inference, we found that this model fits mortality curves from nine outbreaks in Europe better than models for pneumonic or rodent transmission. Our results support that human ectoparasites were primary vectors for plague during the Second Pandemic, including the Black Death (1346–1353), ultimately challenging the assumption that plague in Europe was predominantly spread by rats.

Quantitative Analysis of Proliferation and Excretion of Bartonella quintana in Body Lice, Pediculus humanus L.

2007 ◽  
Vol 77 (3) ◽  
pp. 562-566 ◽  
Author(s):  
Naomi Seki ◽  
Mutsuo Kobayashi ◽  
Tsuguo Sasaki ◽  
Noriko Saito ◽  
Minoru Mihara ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Bartonella Quintana ◽  
Pediculus Humanus ◽  
Body Lice

scholarly journals THE EXPERIMENTAL INFECTION OF THE HUMAN BODY LOUSE, PEDICULUS HUMANUS CORPORIS, WITH MURINE AND EPIDEMIC LOUSE-BORNE TYPHUS STRAINS

1945 ◽  
Vol 82 (1) ◽  
pp. 1-20 ◽  
Author(s):  
J. C. Snyder ◽  
C. M. Wheeler
Keyword(s):  
Human Body ◽  
Experimental Infection ◽  
Body Louse ◽  
Pediculus Humanus ◽  
Typhus Fever ◽  
Human Body Louse ◽  
Body Lice

Experiments are described which demonstrate that human body lice (Pediculus humanus corporis), were infected experimentally with murine and epidemic louse-borne strains of typhus fever by feeding on suitably prepared rabbits. Details of the two methods of infection, the "bleb technique" and the "I.V. technique," are presented. It is concluded that the experimental infection of human lice with typhus can be accomplished very easily and rapidly with these methods. The possible applications of the method are discussed.

Molecular Survey of Head and Body Lice,Pediculus humanus, in France

2018 ◽  
Vol 18 (5) ◽  
pp. 243-251 ◽  
Author(s):  
Kerdalidec Candy ◽  
Nadia Amanzougaghene ◽  
Arezki Izri ◽  
Sophie Brun ◽  
Rémy Durand ◽  
...  
Keyword(s):  
Pediculus Humanus ◽  
Molecular Survey ◽  
Body Lice

scholarly journals Lethal effects of synthetic analogues of juvenile hormone on the body lice, Pediculus humanus corporis

1973 ◽  
Vol 23 (3) ◽  
pp. 243-246 ◽  
Author(s):  
Masakazu TAKAHASHI ◽  
Minoru MIHARA ◽  
Tetsuya OHTAKI ◽  
Kenji MORI
Keyword(s):  
Juvenile Hormone ◽  
The Body ◽  
Synthetic Analogues ◽  
Lethal Effects ◽  
Pediculus Humanus ◽  
Body Lice

Relapsing fevers

2020 ◽  
pp. 1188-1197
Author(s):  
David A. Warrell
Keyword(s):  
Blood Transfusion ◽  
High Fever ◽  
Relapsing Fever ◽  
Pediculus Humanus ◽  
Tick Vectors ◽  
Body Lice

Louse-borne relapsing fever and tick-borne relapsing fever are characterized by repeated episodes of high fever separated by afebrile periods. They are caused by Borrelia spirochaetes distinct from those responsible for Lyme borrelioses. Untreated patients may suffer as many as five (louse-borne relapsing fever) or ten (tick-borne relapsing fever) febrile relapses of decreasing severity. B. myamotoi is much less likely to relapse. Humans are the sole reservoir of epidemic louse-borne relapsing fever caused by B. recurrentis and transmitted by body lice (Pediculus humanus corporis). Endemic tick-borne relapsing fevers are caused by at least 17 different Borrelia species and have their own particular species of soft Ornithodoros, or, in the case of B. myamotoi and B. lonestari, hard Ixodes or Ablyomma tick vectors that also act as reservoirs. Transmission transplacentally, or by needlestick, blood transfusion, or laboratory accident is also possible.

Sign in / Sign up

Export Citation Format

Share Document