Taxonomy, phylogeny and host-parasite interaction of two novel Myxobolus species infecting Brycon orthotaenia from the São Francisco River, Brazil

Publication date: Available online 22 January 2020Source: Parasitology InternationalAuthor(s): Juliana Naldoni, Jose O.L. Pereira, Tiago Milanin, Edson A. Adriano, Marcia R.M. da Silva, Antonio A.M. MaiaAbstractTwo new Myxobolus species were described infecting Brycon orthotaenia from the São Francisco River, in the state of Minas Gerais, Brazil. From a total of 39 B. orthotaenia collected, two specimens (5.1%) exhibited infection of the ovary and 12 specimens (30.8%) displayed infection of the liver. The plasmodia of both Myxobolus species were white and spherical measuring around 1 mm in length. The plasmodium found in the ovary showed mature myxospores, which were oval shaped from the frontal view and measured 9.2–11.0 (9.8 ± 0.4) μm in length, 5.9–6.9 (6.5 ± 0.3) μm in width and 4.6–5 (4.9 ± 0.1) μm in diameter. The two polar capsules were the same size and measured 3.9–6.2 (4.7 ± 0.5) μm in length and 1.8–2.4 (2.1 ± 0.2) μm in width. The polar tubules had 9 coils. The plasmodium found in the liver showed mature myxospores which were ellipsoidal in shape from the frontal view and measured 10.0–11.4 (10.7 ± 0.5) μm in length, 7.3–8.6 (8.1 ± 0.4) μm in width and 5.3–7.0 (6.8 ± 0.4) μm in diameter. The two polar capsules were the same size and measured 4.2–5.4 (4.9 ± 0.3) μm in length and 1.9–2.9 (2.7 ± 0.3) μm in width. The polar tubules had 8 coils. Ultrastructural analysis revealed an async...
Source: Parasitology International - Category: Parasitology Source Type: research