Ultrastructure of Gametocyst of Parasitic Protozoan, Nematopsis sp. in Black Tiger Shrimp Penaeus monodon from the Gulf of Thailand

• Authors: Chanawat TUNTIWARANURUK , Jantanee NOPPHARATARPHAKUL , Jirat BOONMAMEEPOOL , E. Suchart UPATHAM
• Languages of publication: PL

Abstracts

PL

Ultrastructure of gametocyst of Nematopsis sp., a protozoa parasite of black tiger shrimp Penaeus monodon from the Gulf of Thailand is described. Ball-shaped gametocysts of about 110–160 µm diameter were found in close contact with the intestinal wall of shrimps. Surface of the gametocyst cyst wall or capsule is wrinkled with a circular bare area at one pole that contains a central pore 4–5 µm in diameter. The interior of the gametocyst is composed of numerous gymnospores and membranous sacs. Gymnospores varied in size with an average diameter of 6–8 µm. Ball-shaped gymnospores were composed of numerous, radially arranged, cone shaped sporozoites. Average width and length of sporozoites were 0.8–1.2 µm and 3–5 µm, respectively, with their rostral part pointing outward and caudal part, inward connecting to the residual cytoplasm in the centre of a gymospore. The rostral part of the sporozoite contains an oval nucleus, rough endoplasmic reticulum, mitochondria and a group of secretory granules. Membranous sacs were composed of two types of globular granules; large electron lucid granules and small dense granules.

Keywords

PL

Nematopsis, Protozoa, parasite, gametocyst, gymnospore, ultrastructure

• Publisher: Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
• Journal: Acta Protozoologica
• Year: 2015
• Volume: 54
• Issue: 2

Dates

published

2015

online

18 - 09 - 2015

Contributors

author

Chanawat TUNTIWARANURUK

author

Jantanee NOPPHARATARPHAKUL

author

Jirat BOONMAMEEPOOL

author

E. Suchart UPATHAM