Linked Life Data

12107453

Source:http://linkedlifedata.com/resource/pubmed/id/12107453

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2002-7-10
pubmed:abstractText
Serious loss in the length and weight of the economically important catfish Clarias gariepinus was caused by a high intensity of infestation with Henneguya suprabranchiae, parasites which infect the hyaline cartilage of the suprabranchial organ of fish. Fish were collected from three different localities: the River Nile in the Cairo and Giza provinces, some Giza markets and agricultural drains in Kalyubia province. All harbored cysts at the tips of the secondary bronchioles. These measured between 1.5 and 5 mm in length. The plasmodia of these parasites contained generative cells with immature pansporoblasts at the periphery and mature spores occupying the center. The mature spores were mostly elongate fusiform and had two identical, parallel elongate polar capsules. Each capsule contained a polar filament coiled eight times. There was an iodinophilous vacuole within the sporoplasm. The shell valves extended posteriorly to form two caudal processes. New histopathological lesions caused by these parasites, which are cited to be pathogenic, were studied. Plasmodium growth on the bronchioles was pathogenic. The continuous mass growth of plasmodium in the colony led to pressure on the host cartilaginous tissue which was subsequently compressed. Moreover, this compression induced severe atrophy as well as damage to and destruction of the endothelial lining of the hyaline cartilage. The whole bronchiole tissue was shown to be sloughing and necrotic at the site of infection. In addition, the blood vessels lining the epithelia of the bronchiole were dilated, particularly when large plasmodia were present. A high intensity of infection with several plasmodia may cause a disturbance in the respiratory process of the infected catfish, leading to asphyxia and subsequently to weight loss. In addition, new ultrastructural data on the generative cells, sporogenesis, capsulogenesis, valvogenesis and spore maturation of H. suprabranchiae are presented.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0932-0113
pubmed:author
pubmed:issnType
Print
pubmed:volume
88
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
617-26
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Histopathological and ultrastructural studies of Henneguya suprabranchiae Landsberg, 1987 (Myxosporea: Myxobolidae) parasitizing the suprabranchial organ of the freshwater catfish Clarias gariepinus Burchell, 1822 in Egypt.
pubmed:affiliation
National Institute of Oceanography and Fisheries, Aquatic Pathological Laboratory, 101 Kaser El-Einii St., Cairo, Egypt. el_mansy@hotmail.com
pubmed:publicationType
Journal Article