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A wide range of commensal protozoa are carried and are not pathogenic except for Coccidia and Cryptosporidium species. Protozoan infections are generally the result of poor husbandry. Contact with rabbits can allow other rare protozoan infections in guinea pigs. <br />

A wide range of commensal protozoa are carried and are not pathogenic except for Coccidia and Cryptosporidium species. Protozoan infections are generally the result of poor husbandry. Contact with rabbits can allow other rare protozoan infections in guinea pigs. <br />

Eimeria caviae is the coccidial species contracted by guinea pigs eating contaminated food, however coccidiosis in guinea pigs is rare. Droppings will be slimy and contain blood. Oocysts will be present in the faeces and can be seen on microscopic examination.<br />

Eimeria caviae is the coccidial species contracted by guinea pigs eating contaminated food, however coccidiosis in guinea pigs is rare. Droppings will be slimy and contain blood. Oocysts will be present in the faeces and can be seen on microscopic examination.<br />

Cryptosporidium species that colonise the intestine will cause weight loss and diarrhoea. Microscopic pathologic findings will include flattened and irregular villi in the ileum together with a granulomatous infiltrate into the lamina propria and absorptive areas of the intestinal epithelium. In some cases the parasite itself may be visualised via parasitophorous vacuoles within the apical portion of the infected enterocyte.

Cryptosporidium species that colonise the intestine will cause weight loss and diarrhoea.

Microscopic pathologic findings will include flattened and irregular villi in the ileum together with a granulomatous infiltrate into the lamina propria and absorptive areas of the intestinal epithelium. In some cases the parasite itself may be visualised via parasitophorous vacuoles within the apical portion of the infected enterocyte.

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'''Ascaridae'''

'''Ascaridae'''