Related Experiment Video

Updated: Sep 29, 2026

Studying Cryptosporidium Infection in 3D Tissue-derived Human Organoid Culture Systems by Microinjection
05:31

Studying Cryptosporidium Infection in 3D Tissue-derived Human Organoid Culture Systems by Microinjection

Published on: September 14, 2019

Cryptosporidiosis: epidemiology and impact

Rebecca A Dillingham1, Aldo A Lima, Richard L Guerrant

  • 1Division of Geographic and International Medicine, University of Virginia School of Medicine, Health Sciences Center, P.O. Box 801379, Charlottesville, VA 22908-1379, USA.

Microbes and Infection
|August 23, 2002
PubMed

Insights

Cryptosporidium, a parasite causing severe diarrhea, poses a significant public health risk due to its resilient oocysts. This review highlights its transmission routes and impact, especially in vulnerable populations like malnourished children.

Area of Science:

  • * Infectious Diseases
  • * Public Health
  • * Environmental Microbiology

Background:

  • * Cryptosporidium, a protozoan parasite, was identified in humans in 1976 and gained recognition for causing severe diarrhea in AIDS patients during the 1980s and 1990s.
  • * Its characteristics, including hardy, chlorine-resistant oocysts, small size, and low infectious dose, contribute to its widespread transmission.
  • * The parasite's ability to complete its infectious cycle upon shedding and its zoonotic potential further exacerbate its public health significance.

Purpose of the Study:

  • * To review the epidemiology and public health implications of Cryptosporidium infections.
  • * To highlight the challenges in controlling Cryptosporidium transmission in various settings.
  • * To emphasize the long-term health consequences, particularly in immunocompromised and malnourished individuals.

Main Methods:

  • * Comprehensive literature review of Cryptosporidium research.
  • * Analysis of transmission pathways and risk factors.
  • * Examination of clinical impact and public health strategies.

Main Results:

  • * Cryptosporidium poses a threat through contaminated drinking and recreational water, food, and person-to-person contact.
  • * High-risk environments include day care centers, hospitals, and areas with animal exposure or poor sanitation.
  • * Malnourished children are particularly susceptible to severe and prolonged illness.

Conclusions:

  • * Cryptosporidium remains a significant global health concern requiring robust water and food safety measures.
  • * Effective control strategies must address its environmental resilience and diverse transmission routes.
  • * Further research is needed to mitigate the long-term impact on vulnerable populations.

More Related Videos

A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.12:11

A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.

Published on: July 9, 2012

Related Concept Videos

Amebiasis01:28

Amebiasis

Entamoeba histolytica, a protozoan parasite, is responsible for intestinal and extraintestinal amebiasis. Though a significant proportion of infections remain asymptomatic, approximately 50 million individuals annually are estimated to present with clinical disease, resulting in up to 100,000 deaths globally. The disease burden is disproportionately high in regions with lower socioeconomic status, such as parts of India, Africa, Mexico, and Latin America.Etiology and TransmissionThe infective...
Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

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...
Giardiasis01:12

Giardiasis

Giardiasis is a globally prevalent intestinal infection caused by the protozoan parasite Giardia duodenalis (also known as G. lamblia or G. intestinalis). This flagellated protozoan is the most frequently identified intestinal parasite in the United States and worldwide. Transmission primarily occurs via the fecal-oral route, with infection arising from ingestion of water or food contaminated with cysts. Individuals in low-resource settings, international travelers, outdoor enthusiasts, daycare...
Toxoplasmosis01:28

Toxoplasmosis

Toxoplasmosis, a zoonotic disease caused by the protozoan Toxoplasma gondii, poses significant public health challenges globally due to its high seroprevalence and varied clinical manifestations. As an obligate intracellular parasite, T. gondii can infect all warm-blooded vertebrates, but felids are its only definitive hosts, shedding unsporulated oocysts into the environment. Humans typically acquire the infection through ingestion of tissue cysts in undercooked meat or oocysts from...
Malaria01:29

Malaria

Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...
Diversity of Protists II01:27

Diversity of Protists II

Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...