Related Experiment Video
Updated: Aug 15, 2026
06:00
Rearing Ixodes scapularis, the Black-legged Tick: Feeding Immature Stages on Mice
Published on: May 8, 2017
The scourge of scabies
David J Kemp1, Shelley F Walton, Pearly Harumal
1The Queensland Institute of Medical Research, Darwin, Australia. daveK@qimr.edu.au
Biologist (London, England)
|February 20, 2002
Summary
Scabies, a neglected disease affecting millions, is being studied with new molecular methods. Genetic research suggests dogs may not be a significant reservoir for human scabies infections, challenging previous beliefs.
Area of Science:
- Parasitology
- Molecular Biology
- Public Health
Background:
- Scabies, caused by the itch mite, is a significant global health issue.
- The potential role of animal reservoirs, particularly dogs, in human scabies transmission has been debated.
- Understanding transmission dynamics is crucial for effective control strategies.
Purpose of the Study:
- To investigate the role of dogs as a potential reservoir for human scabies infections.
- To utilize molecular approaches to better understand scabies parasite biology and transmission.
- To inform future strategies for scabies control and prevention.
Main Methods:
- Application of molecular techniques to study the scabies mite.
- Genetic analysis of scabies parasite populations from human and canine sources.
- Comparative genomics to assess potential cross-species transmission.
Main Results:
- Genetic data cast doubt on the hypothesis that dogs serve as a reservoir for human scabies.
- Molecular insights are beginning to illuminate the biology of the Sarcoptes scabiei mite.
- Current understanding suggests a limited role for canine-human transmission.
Conclusions:
- The long-held assumption of dogs as a major reservoir for human scabies is likely inaccurate.
- Further molecular research is essential for advancing scabies control and prevention efforts.
- Focus may need to shift towards human-to-human transmission dynamics.
Related Concept Videos
01:23Skin Diseases and Disorders
Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
01:29Staphylococcal Skin Infections
Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
01:26Rocky Mountain Spotted Fever
Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.
01:24Smallpox
Smallpox is a severe contagious disease caused by the Variola major virus, a double-stranded DNA member of the Poxviridae family.Variola major transmission occurs primarily via inhalation of virus-laden droplets or direct contact with infectious scabs. The incubation period averages approximately seven days, although it may range from 7 to 17 days depending on the inoculum and host factors.Clinically, the prodromal phase is marked by an abrupt onset of high fever, malaise, headache, and myalgia.
01:30Leishmaniasis
Leishmaniasis is a protozoal disease caused by species of the genus Leishmania and transmitted through the bite of infected female sandflies. The parasite exists in two principal morphological forms during its life cycle. A sandfly acquires intracellular amastigotes from an infected reservoir host, such as a dog. Within the sandfly, these forms differentiate into motile, flagellated promastigotes. During a subsequent blood meal, promastigotes are injected into the human host, where they...
01:22American Trypanosomiasis
Chagas disease, or American trypanosomiasis, is a vector-borne parasitic infection caused by Trypanosoma cruzi, a flagellated protozoan (kinetoplastid) of the family Trypanosomatidae. The disease is endemic in Latin America, although cases are increasingly reported worldwide due to human migration. Transmission most commonly occurs when feces of infected triatomine bugs contaminate bite wounds or mucosal surfaces; additional routes include congenital, transfusional, transplant-related, and oral...