Related Experiment Video
Updated: Jan 1, 2026
09:23
Parasite Induced Genetically Driven Autoimmune Chagas Heart Disease in the Chicken Model
Published on: July 29, 2012
14.4K
[Gamasoidosis caused by Dermanyssusgallinae].
C Prouteau1, M Ameline1, L Roy2
1Service de dermatologie, centre hospitalier universitaire de Rennes, 2, rue Henri le Guilloux, 35000 Rennes, France.
Annales De Dermatologie Et De Venereologie
|December 25, 2019
Summary
Poultry red mites (Dermanyssus gallinae) can transmit from chickens to humans, causing prurigo. This case confirms mite transmission via hens using morphological and molecular analysis.
Area of Science:
- Veterinary Entomology
- Human Dermatology
Background:
- Mite parasites pose a zoonotic risk, potentially causing skin conditions like prurigo in humans.
- Dermanyssus gallinae, the poultry red mite, is a common ectoparasite of birds.
Observation:
- A 75-year-old woman presented with pruritus and a rash, diagnosed as prurigo.
- Mites identified as Dermanyssus gallinae were observed on the patient's skin.
- The infestation source was traced to a henhouse containing the mites.
Findings:
- Morphological and mitochondrial DNA sequencing confirmed the mite species as Dermanyssus gallinae.
- Molecular analysis verified the transmission link between the patient's mites and those in the henhouse.
- Poultry farming was identified as the source of human contamination.
Implications:
- This case highlights the zoonotic potential of Dermanyssus gallinae.
- It underscores the importance of identifying the source of mite infestations in human cases.
- Effective control measures in poultry farming may prevent human transmission and associated dermatological conditions.
Related Concept Videos
01:28Fungal Phylum Microsporidia
349
Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
349
00:58Symbiosis
36.7K
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
36.7K
01:23Skin Diseases and Disorders
5.1K
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...
5.1K
00:49Complementation Tests
6.0K
A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
6.0K
02:41Lethal Alleles
17.6K
Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
17.6K
02:27Background and Environment Affect Phenotype
7.3K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
7.3K