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Studying Cryptosporidium Infection in 3D Tissue-derived Human Organoid Culture Systems by Microinjection
Published on: September 14, 2019
Cryptosporidiosis-an overview
1Department of Physiology, Morehouse School of Medicine, Atlanta, GA 30310-1495, USA.
Abstract:
Apicomplexan protozoan parasites of the genus Cryptosporidium infect the gastrointestinal tract and lungs of a wide variety of animals, including humans. The majority of human infections are due to either Cryptosporidium hominis (C. hominis) and/or Cryptosporidium parvum (C. parvum). The parasite has a complex life cycle that includes both asexual and sexual stages. While there are invasive free living stages, proliferation and differentiation take place within a unique parasitrophorous vacuole under the host cell brush border but outside the host cell cytoplasm. Infection is spread by environmentally resistant spores that primarily contaminate drinking water and occasionally food sources, which may cause significant outbreaks of diarrhea that generally lasts less than 2 w in immunocompetent individuals. In immunodeficient or immunosuppressed individuals, diarrhea may be copious and can result in significant morbidity and mortality, particularly in AIDS patients. Although diagnosis is relatively simple, effective drug treatment, particulary for infections in immunodeficient patients, has not been uniformly successful. This overview summarizes the species known to infect humans, aspects of the parasite life cycle, sources of infection, the pathophysiology of cryptosporidiosis, the immune response to infection, diagnosis, treatment and some aspects of cryptosporidiosis in China.
Insights
Cryptosporidium parasites cause gastrointestinal illness, particularly in immunocompromised individuals. Effective treatments for cryptosporidiosis remain a challenge, especially in vulnerable populations.
Area of Science:
- Parasitology
- Infectious Diseases
- Public Health
Background:
- Apicomplexan protozoan parasites, genus Cryptosporidium, infect diverse hosts including humans.
- Human infections commonly result from Cryptosporidium hominis and Cryptosporidium parvum.
- The parasite's complex life cycle involves asexual and sexual stages within a unique parasitophorous vacuole.
Purpose of the Study:
- To provide a comprehensive overview of Cryptosporidium infections.
- To detail the parasite's life cycle, transmission routes, and pathogenesis.
- To discuss diagnosis, treatment challenges, and immune responses to cryptosporidiosis.
Main Methods:
- Literature review and synthesis of existing research on Cryptosporidium.
- Analysis of epidemiological data on human infections.
- Examination of biological and pathological aspects of the parasite.
Main Results:
- Cryptosporidium spreads via resistant spores in contaminated water and food, causing outbreaks of diarrhea.
- Immunocompetent individuals typically experience self-limiting illness, while immunodeficient patients face severe morbidity and mortality.
- Diagnosis is straightforward, but effective treatments, especially for the immunocompromised, are limited.
Conclusions:
- Cryptosporidiosis poses a significant public health concern, particularly for immunocompromised individuals.
- Further research is needed to develop uniformly successful treatment strategies.
- Understanding the parasite's biology and host-pathogen interactions is crucial for control.
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