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8 results for “Lagostomus”
Fig. 4 in First record of an infection by tissue cyst-forming coccidia in wild vizcachas (Lagostomus maximus, Rodentia) of Argentina
Fig. 4. Morphological structure of the cyst wall. Cortical brain photomicrograph shows a thin cyst wall (A). A detailed view shows that the cyst wall is made up of host-nucleated cells indicated by black arrowheads (B). In contrast, tissue cysts seen in organs other than the nervous system show a thicker cystic wall. Such is the case for those tissue cysts observed in the mammary (C–D), adrenal (E) and spleen (F) glands. The most notorious differential feature is the thick collagen outer layer in cysts outside the nervous system (white arrowheads). Bz: bradyzoites. A–B: Giemsa staining; C–D: Masson's trichrome staining. E–F: hematoxilin-eosin staining.
Fig. 2 in First record of an infection by tissue cyst-forming coccidia in wild vizcachas (Lagostomus maximus, Rodentia) of Argentina
Fig. 2. Cysts localized in adult brain and in an embryonic pituitary gland of plains vizcachas. Representative photomicrographs of histological sections of adult brains of infected vizcachas. Black arrowhead indicates a solitary tissue cyst in the striatum (A). A detailed view shows signs of inflammatory cells infiltration (arrow) (B). Silver impregnation staining allows visualization of the wall of a cortical tissue cyst (white arrowhead)(C). Embryonic pituitary exhibited multiple of cysts per section (black arrowheads) (D). Arrows indicate the radial arrangement of bradyzoites in the cyst wall in a detailed view of the embryo pituitary (E). A–B: Giemsa staining. C: silver impregnation technique. D–E: hematoxilin-eosin staining.
Fig. 1 in First record of an infection by tissue cyst-forming coccidia in wild vizcachas (Lagostomus maximus, Rodentia) of Argentina
Fig. 1. Tissue cysts in various organs of plains vizcachas. Representative photomicrographs of histological sections of ovary (A–B), uterus (C), mammary gland (D), adrenal (E), spleen (F), and suspension of cysts recovered from the superficial fascia (G), all of them collected from infected adult vizcachas. Suspension of cysts recovered from amniotic sac of an infected embryo (H). Note that while the ovaries, mammary glands, superficial fascia and fluid from amniotic sac show a high density of cysts, the rest of the organs tend to show only one or very few cysts per section. White arrowheads indicate corpora lutea and black arrowheads indicate tissue cysts. A, B, C, E and F: hematoxilin-eosin staining. D: Masson's trichrome staining.
Fig. 3 in First record of an infection by tissue cyst-forming coccidia in wild vizcachas (Lagostomus maximus, Rodentia) of Argentina
Fig. 3. Morphology of the tissue cyst recorded in plains vizcachas. Mammary gland photomicrograph illustrating a tissue cyst with a thick wall made up of a collagen fibers outer layer and the inner layer consisting of nucleated host cells enclosing thousands of spindle-shaped bradyzoites (Bz). Inset: the bradyzoites showed a conoidal (anterior) and a nonconoidal (posterior) end where the nucleus is located, and they exhibit cluster arrangements where they are ordered parallel to each other. Masson's trichrome staining.
Fig. 3 in First report of Sarcocystis spp. (Apicomplexa, Sarcocystidae) in Lagostomus maximus (Desmarest, 1917) (Rodentia, Chinchillidae) in Argentina
Fig. 3. Phylogenetic tree of coxI using the Neighbor-Joining method. Sequences obtained from muscles samples of Lagostomus maximus (VC46, VC44, VC36, VC38, and VC43) form a separate clade of other Sarcocystis species with a sister clade formed by S. canis and Sarcocystis sp. sequences.
Fig. 1 in First report of Sarcocystis spp. (Apicomplexa, Sarcocystidae) in Lagostomus maximus (Desmarest, 1917) (Rodentia, Chinchillidae) in Argentina
Fig. 1. Photograph at inverted microscope at 40× magnification of a sarcocyst portion from a plains viscacha muscle pool.
Fig. 2 in First report of Sarcocystis spp. (Apicomplexa, Sarcocystidae) in Lagostomus maximus (Desmarest, 1917) (Rodentia, Chinchillidae) in Argentina
Fig. 2. Phylogenetic tree of 18S rRNA using the Neighbor-Joining method. Sequences obtained from muscles samples and individual cysts of Lagostomus maximus (VC46_1_cyst_B, VC46, VC44, VC38, and VC43) form a separate clade of other Sarcocystis species and S. nesbitti sequences formed a sister branch.
Fig. 20. Lagostomus maximus AMNHM 80208 in Basicranial Morphology And Relationships Of Antillean Heptaxodontidae (Rodentia, Ctenohystrica, Caviomorpha)
Fig. 20. Lagostomus maximus AMNHM 80208, right auditory region (rev.); stereopair view (with key) in ventrolateral aspect. Extensive meatal growth complicates morphological interpretation. The hypertrophied anterior crus actually forms three-quarters of the elongate definitive meatus, with the mastoid region (and even the exoccipital) completing much of the remaining (posterior) wall (see also fig. 25). The relatively unexpanded tip of the posterior crus can still be identified, separating the tympanic fenestra from the stylomastoid foramen. The large aperture distal to the stylomastoid foramen is the entrance to a short canal for the posterior auricular artery (bristle in canal). Next to it is a long trough, incorporating the original site of the mostly obliterated ventral cleft (ectotympano-ectotympanic suture). On the margin of the stylomastoid foramen another medially directed foramen may be found; this is provisionally regarded as the homolog of posttympanic foramen of Dinomys (C2:2).
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