1st Student's Major

Biological Sciences

1st Student's College

Science, Engineering and Technology

Students' Professional Biography

Aaron Schindler is currently majoring in Biology with an emphasis in Microbiology and a minor in chemistry. He has an Associate in Applied Sciences for Medical Laboratory Technology from John A. Logan College and is a registered Medical Laboratory Technician with the American Society for Clinical Pathology.

Mentor's Name

Dorothy Wrigley

Mentor's Email Address


Mentor's Department

Biological Sciences

Mentor's College

Science, Engineering and Technology


The common earthworm, Eisenia fetida, exhibits a rudimentary immune system. The earthworm needs cellular and chemical responses against a constant microbial exposure from its natural environment. Some cellular and chemical responses are found in the coelomic fluid and have been shown to demonstrate anti-microbial characteristics. This project uses microscopy and modified staining techniques to differentiate and categorize the cellular components found in the coelomic fluid. Following a microbial challenge by Klebsiella pneumoniae, an inflammatory response was initiated. Six groups of earthworms were injected with 0.05 ml of 1.0 x 106 cfu /ml K. pneumoniae on day one and tested over a period of five days. A group of three worms was shocked each day for the next five days to cause the coelomic fluid and cells to pass through the body wall. The coelomic fluid was placed directly on glass slides, dried and stained with a modified Wright’s stain using a wash buffer solution with a pH of 6.3. The stained cells were differentiated into four categories. Total cell counts were determined. The data indicated a marked proliferation in total cell counts in comparison to the control worms. This trend of increasing total cell counts continued over the five days. The percent ages of the four types of coelomic cells from the differential remained constant. Cells were photographed and documented for comparisons. Additional studies are ongoing to determine how long the Eisenia fetida take to remove Klebsiella pneumoniae from the coelomic cavity.

Creative Commons License

Creative Commons Attribution-Noncommercial 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 License



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