''Mesnilium'' is a genus of parasitic alveolates belonging to the
phylum
In biology, a phylum (; plural: phyla) is a level of classification or taxonomic rank below kingdom and above class. Traditionally, in botany the term division has been used instead of phylum, although the International Code of Nomenclature f ...
Apicomplexia
The Apicomplexa (also called Apicomplexia) are a large phylum of parasitic Alveolata, alveolates. Most of them possess a unique form of organelle that comprises a type of non-photosynthetic plastid called an apicoplast, and an apical complex stru ...
. Its vertebrate hosts are fish. The vectors are not presently known but are thought likely to be
leech
Leeches are segmented parasitic or predatory worms that comprise the subclass Hirudinea within the phylum Annelida. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular segmented bodie ...
es.
Taxonomy
The genus was created in 1972 by Misra, Haldar and Chakravarty.
[Misra K.K., Haldar D.P. and Chakravarty M.M. (1972) Observations on Mesnilium malariae gen.nov., spec.nov. (Haemosporidia, Sporozoa) from the fresh water teleost, ''Ophicephalus punctatus'' Bloch. Arch. Protistenkd 114, 444-452]
Description
Merogony occurs in
erythrocyte
Red blood cells (RBCs), also referred to as red cells, red blood corpuscles (in humans or other animals not having nucleus in red blood cells), haematids, erythroid cells or erythrocytes (from Greek ''erythros'' for "red" and ''kytos'' for "holl ...
s and reticulo-endothelial cells.
Gamogony
Apicomplexans, a group of intracellular parasites, have life cycle stages that allow them to survive the wide variety of environments they are exposed to during their complex life cycle. Each stage in the life cycle of an apicomplexan organism i ...
occurs only in erythrocytes and pigment granules are present only in
microgamonts and