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Intestinal pathologic findings at early stage infection by Centrocestus armatus in albino rats
1Department of Parasitology, Chung-Ang University College of Medicine, Dongjak-gu, Seoul, Korea.
Abstract:
This study was performed to observe intestinal pathology in early infection by Centrocestus armatus. The flukes were in the lowermost part of the intervillous space of the duodenum and jejunum from 1 day to 7 days postinfection (PI). The stroma of villi around the young fluke was edematous and infiltrated by inflammatory cells such as lymphocytes, plasma cells and eosinophils. The crypt became mildly hyperplastic and villi were moderately atrophied at 4 days PI. The intestinal lesion produced was confined to the areas around the fluke. The pathologic findings were not significantly different between 1,000 and 5,000 metacercariae infection groups. It is suggested that the lesion should be produced by mechanical destruction of the fluke on the enteroepithelial cells.
Insights
Early intestinal pathology from Centrocestus armatus fluke infection involves inflammation and villus damage. Mechanical destruction by flukes appears to cause these observed lesions in the duodenum and jejunum.
Area of Science:
- Veterinary Pathology
- Parasitology
- Gastroenterology
Background:
- Centrocestus armatus is a trematode parasite known to infect various avian and mammalian species.
- Understanding the early pathological changes induced by C. armatus is crucial for diagnosing and managing infections.
Purpose of the Study:
- To investigate and characterize the intestinal pathology in the early stages of Centrocestus armatus infection.
- To determine the relationship between fluke burden and observed pathological findings.
Main Methods:
- Experimental infection of a host model with C. armatus metacercariae.
- Histopathological examination of duodenal and jejunal tissues at various time points postinfection (1-7 days).
- Comparative analysis of lesions in groups infected with different metacercariae doses (1,000 vs. 5,000).
Main Results:
- Flukes were located in the intervillous space of the duodenum and jejunum from 1 to 7 days postinfection.
- Early lesions included edematous villous stroma infiltrated by inflammatory cells (lymphocytes, plasma cells, eosinophils).
- Mild crypt hyperplasia and moderate villus atrophy were observed by day 4 postinfection, with lesions localized around the flukes. Pathological findings were similar between infection dose groups.
Conclusions:
- Centrocestus armatus infection causes localized intestinal pathology characterized by inflammation and tissue damage.
- The observed lesions are likely a result of mechanical destruction of enteroepithelial cells by the flukes.
- The severity of early pathology did not significantly differ between the studied infection doses.