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106 results for “Myxozoa”
FIGURE 2 in New observations on Myxozoa of the goldline sea bream Sarpa salpa L. 1758 (Teleostei: Sparidae) from the Mediterranean coast of Tunisia
FIGURE 2. Photomicrographs of Ceratomyxa pallida from the gall bladder of Sarpa salpa. (A) Spherical trophozoïtes (T) in different size attached to each other in massive groups. (B) Spherical trophozoïte with numerous inner generative cells (gc). (C–D) monosporic plasmodia (p) with fine granular protoplasm, notice the presence of filopodia (f) at the amoeboid plasmodium. (E) Fresh mature spores in sutural view presenting the polar capsules (pc) and sporoplasm nuclei (sn). (F) Fresh mature spore in lateral view. (G) Fresh mature spore in apical view. (H) Mature spore stained with Giemsa showing the distinct spherical polar capsule with visible suture line. Scale bar = 20 µm in A,C–D; 10 µm in B,E–H.
FIGURE 1 in New observations on Myxozoa of the goldline sea bream Sarpa salpa L. 1758 (Teleostei: Sparidae) from the Mediterranean coast of Tunisia
FIGURE 1. Photomicrographs of Ceratomyxa arcuata from the gall bladder of Sarpa salpa. (A) Post mature disporic plasmodium with the rest of the pansporoblast cavity (P). (B–C) Fresh smear of mature spores. (D–F) Mature spores in sutural view showing the polar capsules (pc) and the suture line (sl). (G) Mature spore in lateral view exposed well the sporoplasm nuclei (sn). (E) Mature spore in apical view. Scale bar = 10 Μm.
FIGURES 6–9 in Ultrastructural observations on the development of Ceratomyxa aegyptiaca (Myxozoa: Bivalvulida) infecting Solea aegyptiaca (Pleuronectiformes: Soleidae) from Tunisian coastal lagoon
FIGURES 6–9. Capsulogenesis of Ceratomyxa aegyptiaca. Fig. 6. Detail of two capsulogenic cells (Cc) in different stages of maturation. One capsulogenic cell (Cc) has a mature polar capsule (Pc). The second capsulogenic cell shows the sections of external tube (Et), a capsular primordium (Cp) and nucleus (CNu) in their cytoplasm. Sutural line (S) can be observed. Fig. 7. Detail of a capsulogenic cell showing a polar capsule with twisted appearance of polar filament (Pf). The apical side of the mature spore was surrounded by fibrous material (arrows) between the capsulogenic cell and the valve (V). Note the presence vacuoles (V) in the cytoplasm of the capsulogenic cell (Cc). Fig. 8. Longitudinal section of mature polar capsule (Pc) with its polar filament (arrows) showing an electron dense matrix (*) an outer electron-dense layer (OL) and an inner electron-lucent layer (IL). Note the channel for filament discharge (D) and externally, a surrounding valve (V) can be seen. Fig. 9. A section of spore showing the mature polar capsule (Pc), the opening for the extrusion of the polar filament (Op), two sporoplasm nucleus (SpNu) and one flattened valvogenic nuclei (VNu).
FIGURES 3–5 in Ultrastructural observations on the development of Ceratomyxa aegyptiaca (Myxozoa: Bivalvulida) infecting Solea aegyptiaca (Pleuronectiformes: Soleidae) from Tunisian coastal lagoon
FIGURES 3–5. Earlier sporogonic stages of Ceratomyxa aegyptiaca Fig. 3. Sporoblast showing two capsulogenic cells (Cc) with its nuclei (CNu) and with a prominent external tube (Et) and a capsular primordium (Cp), a sporoplasmogenic cell (SpC) with two nuclei (SpNu) and laterally two valvogenic cells (Vc) with its nuclei (VNu). Fig. 4. Young capsulogenic cell (Cc) with capsular primordium (Cp) composed of an electron-dense outer layer (1), an electron-lucent median layer (2) and an inner electron-dense core (3). Fig. 5. Immature spore attached to the epithelial cell (Ec) showing capsulogenic cell (Cc) with a prominent external tube (Et) in the cytoplasm and a clup-shaped capsular primordium (Cp) which is surrounded by valvogenic cell (Vc).
FIGURES 10–11 in Ultrastructural observations on the development of Ceratomyxa aegyptiaca (Myxozoa: Bivalvulida) infecting Solea aegyptiaca (Pleuronectiformes: Soleidae) from Tunisian coastal lagoon
FIGURES 10–11. Transmission electron micrographs of myxospores of Ceratomyxa aegyptiaca. Fig. 10. Premature myxosspore showing the sporoplasm cell (Spc) with its two nuclei (SpNu). Note the presence of one of the capsulogenic nuclei (CNu). Fig. 11. Young myxospore in frontal view showing two long valves (V) and the flattened valvogenic nuclei (VNu) of one valve.
FIGURES 1–2 in Ultrastructural observations on the development of Ceratomyxa aegyptiaca (Myxozoa: Bivalvulida) infecting Solea aegyptiaca (Pleuronectiformes: Soleidae) from Tunisian coastal lagoon
FIGURES 1–2. Transmission electron micrographs of Ceratomyxa aegyptiaca from the gallbladder of Solea aegyptiaca. Fig. 1. Initial primary cell (P) with large and condensed nucleus (N) containing several vacuoles (V). Fig. 2. Primary cell (P) attached to the gallbladder epithelium showing pinocytotic invaginations (arrows) extending into the host tissue (H).
FIGURE 3 in Ceratomyxa thunni sp. n. (Myxozoa: Ceratomyxidae) in Atlantic northern bluefin tuna (Thunnus thynnus) caught in the Adriatic Sea, Island of Jabuka
FIGURE 3. Large spherical polar capsule with five coils of polar filament. Note densely selfcoiled appearance of each filament row (arrows) (50000x).
FIGURE 1 in Ceratomyxa thunni sp. n. (Myxozoa: Ceratomyxidae) in Atlantic northern bluefin tuna (Thunnus thynnus) caught in the Adriatic Sea, Island of Jabuka
FIGURE 1. Line drawings of mature spore (a), young spore (b) and disporic trophozoite (c) of Ceratomyxa thunni sp. n. Scale bar 10 µm.
FIGURE 6 in Myxosporea (Cnidaria: Myxozoa) infecting the saddled seabream Oblada melanura (L. 1758) (Teleostei: Sparidae) and the painted comber Serranus scriba (L. 1758) (Teleostei: Serranidae) in Tunisia
FIGURE 6. Photomicrographs of Zschokkella sp. from the gall bladder of Serranus scriba. (A) Fresh mature spore in frontal view presenting two spherical polar capsules (pc) and sporoplasm (s) distributed between both of them. (B) Fresh mature spore in valvular view show two sporoplasmic nuclei (sn). (C) Fresh mature spore in lateral view. (D) Another form of mature spore in frontal view. (E–F) Fresh mature spores in sutural view presented the oblique suture line (sl) and the elevation of the shell valve surface (esv). (G) Fresh mature spores with suture running close to midline of the spore length. (H) Fresh mature spore in semi-lateral view. (I) Fresh mature spore in longitudinal view. (J) Mature spores in valvular view presenting the course of the suture line (sl). (H) Mature spore in valvular view showed the parallel surface ridges (sr). (I) Mature spore with the extruded polar filament (pf) from the polar capsule. Scale bar = 10 µm.
FIGURE 5 in Myxosporea (Cnidaria: Myxozoa) infecting the saddled seabream Oblada melanura (L. 1758) (Teleostei: Sparidae) and the painted comber Serranus scriba (L. 1758) (Teleostei: Serranidae) in Tunisia
FIGURE 5. Photomicrographs of Myxodavisia sp. from the gall bladder of Serranus scriba. (A) Mature spores in sutural view presenting the spherical polar capsules (pc) and the straight to slightly curved suture line (sl). (B–D) Fresh smear of mature spores with variable forms. (E) Mature spore showing the sporoplasmic nuclei (sn) and the Capsulogenic nucleus (cn). (F–J) Fresh mature spores in apical view, notice the presence of sutural ridges (sr) in both posterior and anterior ends and the lateral appendages (la). Scale bar = 20 µm in D, 10 µm in A–C,E–J.
FIGURE 3 in Myxosporea (Cnidaria: Myxozoa) infecting the saddled seabream Oblada melanura (L. 1758) (Teleostei: Sparidae) and the painted comber Serranus scriba (L. 1758) (Teleostei: Serranidae) in Tunisia
FIGURE 3. Photomicrographs of Ceratomyxa sp. 1 from the gall bladder of Serranus scriba. (A–F) Variable forms of fresh mature spores in sutural view presenting the pyriform polar capsules (pc), the straight suture line (sl), the sporoplasmic nuclei (sn), the capsulogenic nucleus (cn) and the unequal valves. Scale bar = 10 µm.
FIGURE 4 in Myxosporea (Cnidaria: Myxozoa) infecting the saddled seabream Oblada melanura (L. 1758) (Teleostei: Sparidae) and the painted comber Serranus scriba (L. 1758) (Teleostei: Serranidae) in Tunisia
FIGURE 4. Photomicrographs of Ceratomyxa sp. 2 from the gall bladder of Serranus scriba. (A–B) Fresh mature spores in sutural view. (C) Mature spore in lateral view with two pyriform polar capsules (pc) and two sporoplasmic nuclei (sn). (D–F) Mature spores in apical view. Scale bar = 10 µm.
FIGURE 3 in Myxosporea (Cnidaria: Myxozoa) infecting the saddled seabream Oblada melanura (L. 1758) (Teleostei: Sparidae) and the painted comber Serranus scriba (L. 1758) (Teleostei: Serranidae) in Tunisia
FIGURE 3 (cont.). Photomicrographs of Ceratomyxa sp. 1 from the gall bladder of Serranus scriba. (G–I) Variable forms of fresh mature spores in sutural view. Notice the presence of mixed-infection with Triangula forms (arrow in H). (J) Atypical spore with three polar capsules and three shell valves. Scale bar = 10 µm.
FIGURE 2 in Myxosporea (Cnidaria: Myxozoa) infecting the saddled seabream Oblada melanura (L. 1758) (Teleostei: Sparidae) and the painted comber Serranus scriba (L. 1758) (Teleostei: Serranidae) in Tunisia
FIGURE 2. Photomicrographs of Ceratomyxa sp. 2 from the gall bladder of Oblada melanura. (A–C) Globular to subspherical disporic plasmodia(p), notice the presence of immature spores (is) within plasmodium in B and the migration of two sporoplasmic nuclei (sn) in one side of pre–mature spore in C. (D–E) Fresh smears of mature spores. (F–H) Variable forms of mature spores in sutural view showing the pyriform polar capsules (pc), the suture line (sl) and an iodinophilous vacuole (v). (H) Mature spore in lateral view presented one capsulogenic nucleus (cn) below the polar capsule. Scale bar = 10µm.
FIGURE 8 in Myxosporea (Cnidaria: Myxozoa) infecting the saddled seabream Oblada melanura (L. 1758) (Teleostei: Sparidae) and the painted comber Serranus scriba (L. 1758) (Teleostei: Serranidae) in Tunisia
FIGURE 8. Line drawing of four myxosporeans infecting the painted comber Serranus scriba from Gulf of Tunis, Tunisia. (A–B). Ceratomyxa sp. 1 in sutural (A) and lateral view (B). (C–D) Ceratomyxa sp. 2 in sutural (C) and apical view (D). (E–F). Myxodavisia sp. in sutural (E) and apical view (F). (G–I) Variable form of Zschokkella sp. in frontal view (G), valvular view (H) and sutural view (I). Scale bar = 10 µm.
FIGURE 1 in Myxosporea (Cnidaria: Myxozoa) infecting the saddled seabream Oblada melanura (L. 1758) (Teleostei: Sparidae) and the painted comber Serranus scriba (L. 1758) (Teleostei: Serranidae) in Tunisia
FIGURE 1. Photomicrographs of Ceratomyxa sp. 1 from the gall bladder of Oblada melanura. (A–E) Disporic sub-spherical to spherical plasmodia (p) containing each one two identical spores surrounded with vary refractive granules (g), Notice the presence of two capsulogenic nuclei (cn) and numerous sporoplasmosomes (spp). (F) Fresh smear contains disporic plasmodia (p) and Mature spores (s). (G) mature spore in sutural view showing the spherical polar capsules (pc), the straight suture line (sl), the sporoplasmic nuclei (sn), the capsulogenic nuclei (cn) and the unequal shell valves. (H) mature spore in lateral view. Scale bar = 20 µm in F; 10 µm in A–E, G–H.
FIGURE 7 in Myxosporea (Cnidaria: Myxozoa) infecting the saddled seabream Oblada melanura (L. 1758) (Teleostei: Sparidae) and the painted comber Serranus scriba (L. 1758) (Teleostei: Serranidae) in Tunisia
FIGURE 7. Line drawing of Myxozoan species infecting the saddle seabream Oblada melanura from the Bay of Bizerte, Tunisia. (A–C) Variable forms of Ceratomyxa sp. 1 in sutural view (A), in lateral view (B), in apical view (C). (D–F) Variable forms of Ceratomyxa sp. 2 in sutural view (D), in lateral view (E), in apical view (F). Scale bar = 10 µm.
FIGURE 1 in First report of Ceratomyxa scorpaeni (Cnidaria: Myxozoa) from Scorpaena porcus in the Black Sea
FIGURE 1 Ceratomyxa scorpaeni infecting the gall bladder of Scorpaena porcus: a disporogonic plasmodium; b transversely elongated mature spore; c crescent shaped mature spore; d the spore drawing.
FIGURE 4. A in A new species of myxozoa in the skeletal striated musculature of Rhamdia quelen (Quoy & Gaimard) (Siluriforme: Pimelodidae) Amazonian fish, Marajó island, Brazil
FIGURE 4. A. Histological section of the cyst and musculature of Rhamdia quelen stained with Gutierrez, showing mature spores (MS) and imature spores (IS) of Myxobolus arariensis n. sp. (*), causing bulging (arrow) and disorganization of the muscle fibers (M). B. thick fibrous (F) wall and the adjacent musculature (M).
FIGURE 5 in A new species of myxozoa in the skeletal striated musculature of Rhamdia quelen (Quoy & Gaimard) (Siluriforme: Pimelodidae) Amazonian fish, Marajó island, Brazil
FIGURE 5. Phylogenetic tree generated by Bayesian Inference (BI) applied to the partial SSU rRNA gene sequences of Myxobolus arariensis sp. n. and related myxosporeans, rooted at Kudoa thyrsites and K. alliaria. The GenBank accession numbers are shown adjacent to the species names. The numbers at the nodes indicate the bootstrap support for the Bayesian Inference. M. arariensis is shown in bold type. The taxonomic order of all the species selected for the phylogenetic analysis is shown. Any values below 50% are indicated by an asterisk. GenBank Accession numbers follow the species name.
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