Description and histopathology of Myxobolus kodjii sp. nov. and Myxobolus dzeufieti sp. nov. (Myxozoa: Myxobolidae) parasites of some Teleost fish from Maga Lake in Cameroon

Examination of some Teleost fish caught in the Maga Lake located in the Far North Region of Cameroon, revealed the presence of two new species of Myxosporidia belonging to the genus Myxobolus, of which morphological and histological description is given in the present study. These species are: Myxobolus kodjii sp. nov., parasite of the eyes of Labeo senegalensis and Myxobolus dzeufieti sp. nov., parasite of the skin of Oreochromis niloticus and Tilapia sp. M. kodjii sp. nov. forms ovoid myxospores, with rounded ends, 8.0 (7.0–9.0) μm long, 5.9 (5.5–6.6) μm wide and 3.8 (3.5–4.2) μm thick. Polar capsules are pyriform, equal in size and measure 3.7 (3.2–4.0) μm × 1.6 (1.4–2.0) μm. M. dzeufieti sp. nov. forms ovoid myxospores, with the anterior end slightly narrowed, 12.3 (11.4–13.7) μm long, 9.8 (9.2–10.6) μm wide and 5.7 (5.0–6.0) μm thick. Its polar capsules are pyriform and equal in size and measure 4.8 (4.0–5.5) μm × 2.9 (2.5–3.3) μm. These new species of Myxobolus are histozoic. The cysts of M. kodjii sp. nov. induce a local inflammatory reaction and their implantation in the sclera can affect the sight of the host fish. The presence of the cysts of M. dzeufieti sp. nov. on the skin did not cause an inflammatory reaction in host fish.