Micro-Organisms in the Intestines of Earthworms Parle, J. N.,, 31, 1-11 (1963), doi = https://doi.org/10.1099/00221287-31-1-1, publicationName = Microbiology Society, issn = 1350-0872, abstract= SUMMARY Actinomycetes and bacteria, but not fungi, increase rapidly in numbers during the passage of food through the worm gut. Enzymes produced by the worm rather than micro-organisms seem to be the main agents digesting cellulose and chitin. The rate that material moves through the intestine depends on whether the animal is feeding; food takes about 20 hr. to pass, but when burrows are being formed material passes in about 12 hr., language=, type=