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Detection of hemagglutinins in cultures of squirrel monkey intestinal trichomonads
Abstract:
Intestinal trichomonads are very common inhabitants of captive squirrel monkeys. In evaluating the potential pathogenicity of these organisms, we encountered hitherto unknown hemagglutinins in their culture fluids. The cytopathic effect associated with a number of the isolates resembled that caused by vacuolating viruses. We have ruled out conventional viruses as the cause of the cytopathic effect and as the source of the hemagglutinin. The agglutinin has some of the basic characteristics of lectins. Parallel experiments demonstrated agglutination of erythrocytes from squirrel monkeys, humans, dogs, cats, guinea pigs, and horses, with the first two types being the most sensitive. Relatively less agglutination was seen with rat erythrocytes. Agglutination of sheep, rabbit, chicken, and bovine erythrocytes was virtually absent.
Insights
Researchers discovered novel hemagglutinins from intestinal trichomonads in squirrel monkeys. These compounds, similar to lectins, caused cell damage resembling viral effects, ruling out conventional viruses as the cause.
Area of Science:
- Microbiology
- Parasitology
- Cell Biology
Background:
- Intestinal trichomonads are common in captive squirrel monkeys.
- The potential pathogenicity of these protozoan parasites is under investigation.
Purpose of the Study:
- To investigate the cause of cytopathic effects observed in squirrel monkey intestinal trichomonad cultures.
- To identify and characterize novel hemagglutinins produced by these organisms.
Main Methods:
- Culturing intestinal trichomonads from squirrel monkeys.
- Assessing cytopathic effects in cell cultures.
- Performing hemagglutination assays with erythrocytes from various species.
- Characterizing the biochemical properties of the identified hemagglutinin.
Main Results:
- Hitherto unknown hemagglutinins were identified in trichomonad culture fluids.
- The observed cytopathic effects were not caused by conventional viruses.
- The hemagglutinin exhibited characteristics similar to lectins.
- Erythrocytes from squirrel monkeys and humans were most sensitive to agglutination, while sheep, rabbit, chicken, and bovine erythrocytes showed minimal agglutination.
Conclusions:
- The study identified novel lectin-like hemagglutinins produced by intestinal trichomonads.
- These hemagglutinins may contribute to the pathogenicity of trichomonad infections in squirrel monkeys.
- Further research is warranted to elucidate the precise role of these hemagglutinins in host-parasite interactions.
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