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PubMedDate not supplied

[Importance of cellular immunity factors in the pathogenesis of experimental balantidiasis].

Adult white rats were immunized by numerous subcutaneous injections of antigenes obtained from the cultures of B. coli and B. suis. After the rats were sensibilized they were infected with cultural forms of Balantidium. 75% of infected rats were found to have ciliates in the lumen of the large intestine. In the tissues of the intestinal wall up to the muscular layer there were observed certain pathomorphological changes such as hyperemy, oedema, haemorrhagia and ulcers. By means of the macrophaga migration test it was established that in rats during their immunization and following infection appear lymphocytes which are sensibilized in relation to the balantidial antigene that points to the formation of slow allergy in their organisms.

Animals↗
PubMed1982

Epizootic of balantidiasis in lowland gorillas.

Acute enteritis characterized by watery diarrhea and lethargy occurred in 4 lowland gorillas (Gorilla gorilla gorilla) during a 5-week period at the Los Angeles Zoo. Numerous trophozoites of Balantidium coli were seen in fresh feces from each gorilla. Potentially pathogenic bacteria were isolated from 1 fecal sample. Results of fecal flotation examinations were negative for eggs of metazoan parasites. The gorillas were treated with antibiotics and metronidazole or paromomycin, or both. The most severely affected gorilla had blood and mucus in its feces, became dehydrated, and required hospitalization for supportive fluid therapy. This gorilla as well as the other gorillas recovered rapidly with treatment. Balantidium coli was not seen in fecal samples after the gorillas' recovery.

Animals↗
PubMed1997

A comparison of nucleic acid content in Balantidium coli trophozoites from different isolates.

Cytophotometric assays were performed on Balantidium coli trophozoites isolated from 30 pigs affected by acute balantidiasis (Group I) and from 30 pigs with symptom-free balantidiasis (Group II). Trophozoites from cultures obtained from Group I and II pig isolates were assayed for comparison. Comparative cytophotometric studies on nucleic acids of B. coli trophozoites isolated from acute and symptomless balantidiasis-affected pigs as well as from in vitro cultured trophozoites showed differences which could have resulted from differences between populations in the trophozoans under investigation.

Animals↗
PubMed2004

Amebae and ciliated protozoa as causal agents of waterborne zoonotic disease.

The roles free-living amebae and the parasitic protozoa Entamoeba histolytica and Balantidium coli play as agents of waterborne zoonotic diseases are examined. The free-living soil and water amebae Naegleria fowleri, Acanthamoeba spp., and Balamuthia mandrillaris are recognized etiologic agents of mostly fatal amebic encephalitides in humans and other animals, with immunocompromised and immunocompetent hosts among the victims. Acanthamoeba spp. are also agents of amebic keratitis. Infection is through the respiratory tract, breaks in the skin, or by uptake of water into the nostrils, with spread to the central nervous system. E. histolytica and B. coli are parasitic protozoa that cause amebic dysentery and balantidiasis, respectively. Both intestinal infections are spread via a fecal-oral route, with cysts as the infective stage. Although the amebic encephalitides can be acquired by contact with water, they are not, strictly speaking, waterborne diseases and are not transmitted to humans from animals. Non-human primates and swine are reservoirs for E. histolytica and B. coli, and the diseases they cause are acquired from cysts, usually in sewage-contaminated water. Amebic dysentery and balantidiasis are examples of zoonotic waterborne infections, though human-to-human transmission can occur. The epidemiology of the diseases is examined, as are diagnostic procedures, anti-microbial interventions, and the influence of globalization, climate change, and technological advances on their spread.

Acanthamoeba↗
PubMed1997

Ultrastructural and cytochemical identification of peroxisomes in Balantidium coli, Ciliophora.

Peroxisomes of the trophozoites of Balantidium coli isolated from pig intestine content were investigated, using ultrastructural and cytochemical techniques. The peroxisomes of B. coli trophozoites from pigs with subclinical balantidiasis are less then 0.8 mm in diameter whereas those from pigs with acute balantidiasis are greater than 0.8 micron in diameter. In all the trophozoites peroxisomes are round, oval or dumb-bell shaped. Catalase as an indicative enzyme was detected by cytochemical techniques in B. coli peroxisomes.

Animals↗