The globule leucocyte in bovine schistosomiasis

Area of Science:

• Veterinary Pathology
• Immunology
• Parasitology

Background:

• Schistosoma mattheei is a parasitic flatworm causing significant disease in cattle.
• Understanding the host's immune response is crucial for managing parasitic infections.
• Globule leucocytes are immune cells whose role in parasitic infections requires further elucidation.

Purpose of the Study:

• To investigate the presence and distribution of globule leucocytes in cattle infected with Schistosoma mattheei.
• To determine the temporal and spatial patterns of globule leucocyte accumulation.
• To explore the association of globule leucocytes with the host immune response and their potential origin.

Main Methods:

• Histopathological examination of tissues from cattle experimentally infected with Schistosoma mattheei.
• Microscopic analysis to identify and quantify globule leucocytes in various organs.
• Correlation analysis of globule leucocyte presence with infection duration, intensity, and host response.

Main Results:

• Globule leucocytes were detected in forestomachs, abomasum, duodenum, ileum, large intestine, lung, liver, bladder, and kidney.
• In early infection (7-8 weeks), they were primarily found in the lungs.
• From 18 weeks onwards, globule leucocytes appeared in the alimentary tract, with highest numbers and widest distribution in repeatedly and heavily infected animals.
• Evidence suggested globule leucocytes are linked to the host immune response and may originate from mast cells.

Conclusions:

• Globule leucocytes are a significant component of the immune response in cattle infected with Schistosoma mattheei.
• Their distribution and abundance are influenced by infection dynamics, particularly repeated and heavy infections.
• The findings support the role of globule leucocytes in host defense against Schistosoma mattheei and suggest a mast cell origin.