For example, dogs and pigs may carry hookworm eggs from one place to another, but the eggs do not hatch or pass through any development in these animals. A process which may occur in some sexually reproducing animals where offspring are produced without fertilisation. Any organism which causes harm to its host . A subgroup of the Kingdom Protista, or the single-celled organisms. Naturally, such a distinction is meaningless, as animals and plants belong to completely different kingdoms, but in general, Protozoa refers to those organisms which do not carry out photosynthesis.
Ringworm is the common name given to skin infections by certain fungi.
The correct term is Tinea . The condition is not caused by a worm at all, and the name dates from a time where all ailments were blamed on worms of some description. Unlike most other flukes , the schistosomes are dioecious . A group of single celled organisms which are characterised by having a sexual and an asexual generation in their life-cycle. Examples of parasitic Sporozoans include the malarial parasites, Toxoplasma and Cryptosporidium .