EXPERIMENTAL STUDY OF THE DEVELOPMENT OF RICKETTSIA PROWAZEKI IN THE ORGANS OF HEAD LICE,
Abstract
Larvae and nymphs of body and head lice, under optimum conditions, feed on the skin of man approximately the same number of times (3-8) in 24 hours. Adult lice, especially the females, feed more often (body lice - 5-8 times, head lice - 6-12 times in 24 hours). Body lice survive well following a double feeding in 24 hours, while the head lice die off after 2-4 days. Under optimum conditions, both types of lice survive almost up to 2 months. In head lice, typhus rickettsiosis develops with somewhat different regularities than in body lice: The appearance of Rickettsia prowazeki is recorded with a delay by 3-5 days, the concentration of virus in the insects is considerably lower and hemolytic inhibition is absent, but the rickettsia are preserved longer than in the body lice. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1968
- Accession Number
- AD0675168
Entities
People
- A. V. Grembovskaya
- A. V. Pshenichnov
Organizations
- United States Army Biological Warfare Laboratories