Overview

Comprehensive Description

Description of Brachiola

The type species is B. vesicularum Cali, Takvorian, Lewin, Rendel, Sian, Wittner, Tanowitz, Keohane, and Weiss, 1998 infecting skeletal muscle of Homo sapiens (Primates, Hominidae). Monomorphic, diplokaryotic throughout life cycle. Meiosis unknown. Transmission unknown. Development in direct contact with host cell cytoplasm. All stages with electron dense surface coat. Merogony: binary fission of cells with two diplokarya. Meronts exhibit vesiculo-tubular structures, embedded in surface coat or forming chains extending for a certain distance from the parasite surface. Spores 2.5-2.9 x 1.9-2µm (fixed). Polar tube anisofilar with 7-10 coils, of which the last2-3 are narrower. Coils arranged in 2-3 rows. Comment: By its life cycle and structure this genus is similar to the genus Nosema. However, it differs from typical Nosema spp. by the electron dense coat on the plasma membrane and its extensions.
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