PREHISTORICAL Pediculus humanus capitis INFESTATION: QUANTITATIVE DATA AND LOW VACUUM SCANNING MICROSCOPY
نویسندگان
چکیده
A pre-Columbian Peruvian scalp was examined decades ago by a researcher from the Oswaldo Cruz Foundation. Professor Olympio da Fonseca Filho described nits and adult lice attached to hair shafts and commented about the origin of head lice infestations on mankind. This same scalp was sent to our laboratory and is the subject of the present paper. Analysis showed a massive infestation with nine eggs/cm2 and an impressive number of very well preserved adult lice. The infestation age was roughly estimated as nine months before death based on the distance of nits from the hair root and the medium rate of hair growth. A small traditional textile was associated with the scalp, possibly part of the funerary belongings. Other morphological aspects visualized by low-vacuum scanning electron microscopy are also presented here for adults and nits.
منابع مشابه
Dimeticone-Based Pediculicides: A Physical Approach to Eradicate Head Lice
Resistance of head lice to insecticides with a neurotoxic mode of action, such as permethrin and malathion, is increasing in incidence and geographic extent. As a consequence, physically acting pediculicidal products have emerged. Dimeticones are synthetic silicone oils of low surface tension and can therefore coat most surfaces, thus also killing head lice (Pediculus humanus capitis) by physic...
متن کاملNuclear Genetic Diversity in Human Lice (Pediculus humanus) Reveals Continental Differences and High Inbreeding among Worldwide Populations
Understanding the evolution of parasites is important to both basic and applied evolutionary biology. Knowledge of the genetic structure of parasite populations is critical for our ability to predict how an infection can spread through a host population and for the design of effective control methods. However, very little is known about the genetic structure of most human parasites, including t...
متن کاملPrevalence of head lice infestation and pediculicidal effect of permethrine shampoo in primary school girls in a low-income area in southeast of Iran
BACKGROUND Head lice infestation is a common public health problem that is most prevalent in primary school children throughout the world, especially in developing countries including different parts of Iran. This study aimed to determine the prevalence and risk factors associated with head lice infestation and pediculicidal effect of 1% permethrin shampoo in primary schools girls of Bashagard ...
متن کاملWorldwide Prevalence of Head Lice
5. Miller RW, Rabkin CS. Merkel cell car-cinoma and melanoma: etiological similarities and differences. Luthra UK. Analysis by polymerase chain reaction of the physical state of human papillomavirus type 16 DNA in cervi-cal preneoplastic and neoplastic lesions. To the Editor: Pediculosis capitis has been well-known since antiquity (1). Human infestation can result in psychological frustration f...
متن کاملHead Lice among Governmental Primary School Students in Southern Jordan: Prevalence and Risk Factors
Background Head lice, a common social and health problem among all age groups, is especially widespread among school-aged children. Aims This study aimed to assess the prevalence of pediculosis capitis among governmental primary school students in Southern Jordan and its related risk factors. Settings and Design A sample of 500 primary schools students aged 6-12 from two male and two female...
متن کامل