Protozoan Species
Entamoeba histolytica (Protozoa: Rhizopoda)
Entamoeba histolytica is an anaerobic parasitic protozoan that infects the digestive tract of predominantly humans and other primates. It is a parasite that infects an estimated 50 million people around the world and is a significant cause of morbidity and mortality in developing countries. Analysis of the genome allows new insight into the workings and genome evolution of a human pathogen.
Entamoeba histolytica is an anaerobic parasitic protozoan that infects the digestive tract of predominantly humans and other primates. It is a parasite that infects an estimated 50 million people around the world and is a significant cause of morbidity and mortality in developing countries. Analysis of the genome allows new insight into the workings and genome evolution of a human pathogen.
Giardia duodenalis (Protozoa: Diplomonadida)
Encystation occurs as the parasites transit toward the colon. Encystation occurs as the parasites transit toward the colon. The cyst is the stage found most commonly in nondiarrheal feces.
Encystation occurs as the parasites transit toward the colon. Encystation occurs as the parasites transit toward the colon. The cyst is the stage found most commonly in nondiarrheal feces.
Trypanosoma cruzi (Protozoa: Kinetoplastida)
Chagas disease or American trypanosomiasis, is a tropical parasitic disease caused by the protozoan Trypanosoma cruzi and spread mostly by insects known as Triatominae or kissing bugs.
Chagas disease or American trypanosomiasis, is a tropical parasitic disease caused by the protozoan Trypanosoma cruzi and spread mostly by insects known as Triatominae or kissing bugs.
Isospora spp. (Protozoa: Apicomplexa)
The genus Isospora is the most common coccidian parasitein passerine birds as more than 90% of all coccidia species infecting wild passerine birds belong to this genus.
The genus Isospora is the most common coccidian parasitein passerine birds as more than 90% of all coccidia species infecting wild passerine birds belong to this genus.
Leishmania spp. (Protozoa: Kinetoplastida)
Leishmania is a genus of trypanosomatid protozoa and is the parasite responsible for the disease leishmaniasis.
Leishmania is a genus of trypanosomatid protozoa and is the parasite responsible for the disease leishmaniasis.
Balantidium coli (Protozoa: Ciliophora)
Balantidium coli is a large ciliated protozoan parasite. Balantidium coli has been known about for over a century, but the process of infection has yet to be discovered. It is the only known ciliated parasite to infect humans.
Balantidium coli is a large ciliated protozoan parasite. Balantidium coli has been known about for over a century, but the process of infection has yet to be discovered. It is the only known ciliated parasite to infect humans.
Babesia spp. (Protozoa: Piroplasmida)
Babesiosis is a malaria-like parasitic disease caused by infection with Babesia, a genus of protozoal piroplasms.
Babesiosis is a malaria-like parasitic disease caused by infection with Babesia, a genus of protozoal piroplasms.
Trypanosoma brucei (Protozoa: Kinetoplastida)
The disease is known as Old World (African) trypanosomiasis. Although there are many regional common names given depending on the parasite subspecies and hosts involved, the disease is often called sleeping sickness in humans, and nagana in animals. Parasites injected into the host by the insect vector first cause an inflammatory reaction characterized by a localized tender reddish swelling (known as a chancre). Trypanosomes then multiply in the plasma and interstitial fluid causing acute to subacute febrile illness.
The disease is known as Old World (African) trypanosomiasis. Although there are many regional common names given depending on the parasite subspecies and hosts involved, the disease is often called sleeping sickness in humans, and nagana in animals. Parasites injected into the host by the insect vector first cause an inflammatory reaction characterized by a localized tender reddish swelling (known as a chancre). Trypanosomes then multiply in the plasma and interstitial fluid causing acute to subacute febrile illness.
Eimeria spp. (Protozoa: Apicomplexa)
Most species are not significant pathogens and cause little or no disease. Certain species, however, are highly pathogenic and cause catarrhalic or haemorrhagic enteritis by severe erosion of the mucosal membranes through cell lysis resulting in profuse watery-to-bloody diarrhoea. Clinical disease is not usually manifest until cumulative tissue damage associated with second or third generation schizogony. Moderately-affected animals may show progressive signs such as poor weight gain or weight loss, weakness and emaciation, while severely-affected individuals may die soon after the appearance of disease.
Most species are not significant pathogens and cause little or no disease. Certain species, however, are highly pathogenic and cause catarrhalic or haemorrhagic enteritis by severe erosion of the mucosal membranes through cell lysis resulting in profuse watery-to-bloody diarrhoea. Clinical disease is not usually manifest until cumulative tissue damage associated with second or third generation schizogony. Moderately-affected animals may show progressive signs such as poor weight gain or weight loss, weakness and emaciation, while severely-affected individuals may die soon after the appearance of disease.
Cryptosporidium spp. (Protozoa: Apicomplexa)
Most parasite species infect the small intestines of their hosts (mammals) whereas others infect the respiratory tract (birds) or stomach (reptiles).
Most parasite species infect the small intestines of their hosts (mammals) whereas others infect the respiratory tract (birds) or stomach (reptiles).
Toxoplasma gondii (Protozoa: Apicomplexa)
In cats, parasites undergo asexual and sexual multiplication in intestinal epithelial cells culminating in the formation of oocysts 3-5 days after infection. In all other vertebrate hosts, parasites undergo asexual multiplication in a wide range of extra-intestinal locations (cells of the lymphatic and circulatory systems, nervous tissue, skeletal musculature, etc.).
In cats, parasites undergo asexual and sexual multiplication in intestinal epithelial cells culminating in the formation of oocysts 3-5 days after infection. In all other vertebrate hosts, parasites undergo asexual multiplication in a wide range of extra-intestinal locations (cells of the lymphatic and circulatory systems, nervous tissue, skeletal musculature, etc.).
Plasmodium spp. (Protozoa: Haemosporidia)
The disease malaria is characterized by its long persistence in infected individuals in endemic areas, with characteristic recrudescence or relapses, sometimes after years of subclinical infection. However, infections in highly susceptible individuals, such as children, pregnant women and travellers, can produce acute severe and even fatal disease.
The disease malaria is characterized by its long persistence in infected individuals in endemic areas, with characteristic recrudescence or relapses, sometimes after years of subclinical infection. However, infections in highly susceptible individuals, such as children, pregnant women and travellers, can produce acute severe and even fatal disease.
Thelohania spp. (Protozoa:Microspora)
Parasites are usually found at all stages of development within the muscles, although other tissues and organs can be infected.
Parasites are usually found at all stages of development within the muscles, although other tissues and organs can be infected.
Ichthyophthirius multifilis (Protozoa: Ciliophora)
Trophonts infect the epidermis, cornea and gill filaments.
Trophonts infect the epidermis, cornea and gill filaments.