| myxosporidan infections in some fishes of iowa. | a survey of 617 specimens of fishes representing 8 families in iowa revealed coelozoic infections by chloromyxum catostomi, chloromyxum triijugum, and myxidium macrocapsulare and histozoic infections by henneguya exilis and myxobolus spp. the trophozoite of m. macrocapsulare is described. descriptive notes supplementary to previous literature are provided for 3 coelozoic species. | 1978 | 660563 |
| comparative study of ultrastructure of interlamellar and intralamellar types of henneguya exilis kudo from channel catfish. | the inter- and intralamellar types of henneguya exilis kudo (myxosporida) infections from channel catfish are similar in spore structure and sporogenesis, but differ in the structure of their plasmodium wall and surface coat and in their relationship with the host cells. the 2 clinical types differ also in the sites of development and growth patterns of plasmodia within a gill filament. interlamellar plasmodia are limited by 2 outer unit membranes which give rise to both single-and double-membra ... | 1978 | 660571 |
| five new species of henneguya (protozoa: myxosporida) from ictalurid fishes. | four new species of henneguya (myxosporidan) are described from ictalurus punctatus rafinesque (channel catfish). they are as follows: henneguya postexilis sp. n. and henneguya longicauda sp. n. from the gills; henneguya adiposa sp. n. from the adipose fin; and henneguya diversis sp. n. from the liver, kidney, connective tissue of muscles and fins, and tumor-like external growths. henneguya pellis sp. n. is described from the dermis of ictalurus furcatus (lesueur) (blue catfish). the development ... | 1977 | 881651 |
| ultrastructure of interlamellar henneguya exilis in the channel catfish. | ultrastructural aspects of interlamellar henneguya exilis infections in channel catfish are reported. the plasmodium wall of this form differs from that of other species in that it is composed of two outer unit membranes which give rise to a zone of numerous pinocytic canals. single-membraned canals appeared to be a stable feature of the wall while double-membraned canals are interpreted as those actively carrying out pinocytosis. evidence suggests that host cellular cytoplasm as well as interst ... | 1976 | 1003287 |
| henneguya exilis kudo associated with granulomatous branchitis of channel catfish ictalurus punctatus (rafinesque). | outbreaks of a chronic branchitis in channel catfish ictalurus punctatus (rafinesque) were observed on four fish farms throughout the state of california from november 1982 to april 1984. severe granulomatous inflammation of the gill filaments with necrosis of the cartilage of the gill ray and diffuse epithelial hyperplasia, resulting in extensive fusion of gill lamellae, was present on histologic examination of gill specimens from 35 out of 44 fish examined. numerous, small trophozoites morphol ... | 1986 | 3092431 |
| small subunit ribosomal rna sequence of henneguya exilis (class myxosporea) identifies the actinosporean stage from an oligochaete host. | several transmission studies, as well as recent molecular data, have indicated that the two classes myxosporea and actinosporea represent different life cycle stages of myxozoa. to evaluate the life cycles of myxozoa in catfish aquaculture systems, the small subunit (18s) ribosomal rna gene sequences of henneguya exilis, a myxosporean from channel catfish ictalurus punctatus, and an actinosporean (previously designated as aurantiactinomyxon janiszewskai) from the aquatic oligochaete dero digitat ... | 1999 | 10188262 |
| parasites of native and nonnative fishes of the little colorado river, grand canyon, arizona. | a 2-yr, seasonal, parasitological study of 1,435 fish, belonging to 4 species of native fishes and 7 species of nonnative fishes from the lower little colorado river (lcr) and tributary creeks, grand canyon, arizona, yielded 17 species of parasites. these comprised 1 myxozoan (henneguya exilis), 2 copepods (ergasilus arthrosis and lernaea cyprinacea), 1 acarine (oribatida gen. sp.), 1 piscicolid leech (myzobdella lugubris), 4 monogeneans (gyrodactylus hoffmani, gyrodactylus sp., dactylogyrus ext ... | 2004 | 15562604 |