Other Conditions Causing Yellow Toenails. Although fungal infection is the most likely cause of yellow toenails, rarely, some other disease conditions can also result in yellow toenails. Some of these conditions are psoriasis, jaundice, paronychia, lymphedema, bronchiectasis, tuberculosis and sinusitis.
1. a plant or animal that lives upon or within another living organism at whose expense it obtains some advantage; see symbiosis. 2. the smaller, less complete member of asymmetrical conjoined twins, attached to and dependent upon the autosite.parasitÂ´ic. malarial parasite Plasmodium.
The term used for an organism living in or on another depends on  the nature of the relationship.    - If the relationship is mutually beneficial (mutalism) then the  â¦ organism can be called a symbiont.   - If the relationship does not benefit the host, the organism can  be called a parasite.   Parasites can be endoparasites, which live inside the host, or  ectoparasites, which live on the host.    Some biologists use the term symbiont for any organism in a close  interaction with another.