Head lice ( " Pediculus humanus capitis " ) infestation is most frequent on children aged 3 10 and their families.
12.
But that has changed in the last few years, with the pest that is scientifically known as Pediculus humanus capitis showing resistance to standard remedies.
13.
Trench fever, produced by " Bartonella quintana " infection, is transmitted by the human body louse " Pediculus humanus corporis ".
14.
Using phylogenetic and cophylogenetic analysis, Reed et al . hypothesized that " Pediculus " and " Phthirus " are sister taxa and monophyletic.
15.
A perplexity that louse specialists have not yet resolved is that the pubic louse belongs to a different genus from Pediculus, being known to taxonomists as Phthirus pubis.
16.
The human body louse " Pediculus humanus humanus " had its genome sequenced in 2010, and at that time it had the smallest insect genome known.
17.
The disease is caused by the parasite " Rickettsia quintana ", and transmitted to humans by the body louse " Pediculus humanus corporis ".
18.
Unlike the genus " Pediculus ", the divergence in " Phthirus " does not match the age of host divergence that likely occurred 7 million years ago.
19.
The age of divergence between " Pediculus " and its common ancestor is estimated to be 6-7 million years ago, which matches the age predicted by chimpanzee-hominid divergence.
20.
When humans lost most of their body hair, perhaps 1.8 million years ago, the Pediculus louse would presumably have been restricted to the head, leaving the rest of the body vacant.
