A parasite is an organism which lives on or in another organism called the host. The parasite needs the host to live, but the host gains no benefit from having the parasite. The 3 main classes of parasite are protozoa (unicellular organisms), worms, and arthropods (insects and arachnids).
In comparison to acute bacterial or [...]
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Tagsadhesin animal antibiotic antibody antigen avian bacteria behaviour bird blood bordetella bronchiseptica canine capsule cell diagnosis disease egg enzyme evolution female fish foraging gametes gene glucose hamilton immunity inflammation maynard smith mutation oxygen parasite parental investment prevention prostaglandin protection reproduction resistance secretion signal transduction sperm staphylococcus toxicity treatment tumour