INTERACTIONS BETWEEN CYSTICERCUS FASCIOLARIS AND COMMON RATS

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
SHASHI KIRAN
Keyword(s):  
Granulation Tissue ◽  
Larval Stage ◽  
Histopathological Examination ◽  
Sylvatic Cycle ◽  
Mature Larva ◽  
Hepatic Cysts ◽  
Cysticercus Fasciolaris ◽  
Taenia Taeniaeformis ◽  
Relationship Of ◽  
The Relationship

The objective of this study was to determine the relationship of C. fasciolaris with common rats. Cysticercus fasciolaris is the larval stage of Taenia taeniaeformis . Development of metacestodes ( Cysticercus fasciolaris) occur in the liver of rodents. An urban and a sylvatic cycle occurs. A total of 40 liver specimens of rats were examined. Histopathological examination revealed the presence of multiple hepatic cysts, and the C. fasciolaris larva was surrounded by granulation tissue. Large and separated ûbroblasts in different orientations with some neoplastic changes were seen in advanced hepatic cysticercosis. The bladder involved the larva and large chamber containing the small chamber and opalescent fluid. The scolex of the mature larva is distinctly large, bearing four lateral distinct suckers, a rostellum armed with double, and alternating rows of hooks.

scholarly journals Cysticercus fasciolaris in Brown Rats (Rattus norvegicus) in Grenada, West Indies

2017 ◽  
Vol 2017 ◽  
pp. 1-4 ◽  
Author(s):  
Ravindra Sharma ◽  
Keshaw Tiwari ◽  
Kristen Birmingham ◽  
Elan Armstrong ◽  
Andrea Montanez ◽  
...  
Keyword(s):  
Larval Stage ◽  
Rattus Norvegicus ◽  
West Indies ◽  
Small Rodents ◽  
Residential Areas ◽  
Adult Rats ◽  
Significant Difference ◽  
Cysticercus Fasciolaris ◽  
Taenia Taeniaeformis ◽  
Single Larva

Cat is the definitive host of Taenia taeniaeformis (T. taeniaeformis). Cysticercus fasciolaris (C. fasciolaris), the larval stage of T. taeniaeformis, develops in small rodents which act as intermediate host. The aim of this study was to estimate the prevalence of C. fasciolaris in brown rats (Rattus norvegicus) in the densely human populated parishes, St. George’s and St. David’s of Grenada, West Indies. One hundred and seventy rats were trapped near the residential areas from May to July, 2017 and examined for C. fasciolaris in their liver. Of the 170 rats 115 (67.6%, CI 95% from 60.1 to 74.6) were positive for the larval stage of T. taeniaeformis. One to three cysts were observed in each liver, containing a single larva in each cyst. The prevalence was 77.9% in St. George and 59.1% in St. David which is a significant difference (p<0.05) between the two parishes under study. Based on gender, prevalence in males was 60.9% and females 74.7%. Significant difference was observed between young and adult rats (p=0.03). Prevalence in young rats was 45.0% compared to adults (70.7%). Further study of risk assessment in the cat population in areas of the present research is strongly suggested.

scholarly journals Concurrent infection of Taenia taeniaeformis and Isospora felis in a stray kitten: a case report

2009 ◽  
Vol 54 (No. 2) ◽  
pp. 81-83 ◽  
Author(s):  
L.D. Singla ◽  
G.S. Aulakh ◽  
R. Sharma ◽  
P.D. Juyal ◽  
J. Singh
Keyword(s):  
Histopathological Examination ◽  
Present Report ◽  
Acute Diarrhoea ◽  
Necrotic Enteritis ◽  
Concurrent Infection ◽  
Intermediate Hosts ◽  
Bandicota Bengalensis ◽  
Cysticercus Fasciolaris ◽  
Electron And Light Microscopy ◽  
Taenia Taeniaeformis

The present report describes a unique case of acute diarrhoea, dehydration and weakness in a stray female kitten due to concurrent infection of <i>Taenia taeniaeformis</i> and <i>Isospora felis</i>. Death occured before any treatment could be attempted and postmortem examination revealed the presence of live tapeworms embedded in the mucosa of the small intestine. The tapeworms were identified as <i>Taenia taeniaeformis</i> by Scanning Electron and Light microscopy. The uterus of the tapeworms was filled with eggs. The intestinal contents were yellow in colour and upon their examination by faecal floatation the presence of <i>Isospora</i> oocysts was revealed. On histopathological examination, necrotic enteritis along with endogenous tissue stages of <i>Isospora</i> spp. were observed in the intestine. The other cats in the area were found to pass eggs and/or gravid segments of <i>T. taeniaeformis</i> in their faeces. Infection with the metacestodes (<i>Cysticercus fasciolaris</i>) of this indirectly transmitted parasite was found in the liver of the intermediate hosts, i.e., the wild rats <i>Bandicota bengalensis</i>.

scholarly journals Pilomatrixoma: A Case Study & Review of Literature

2020 ◽  
pp. 1-3
Author(s):  
Alessandro Crisci ◽  
Alessandro Crisci ◽  
Michela Crisci
Keyword(s):  
Histopathological Examination ◽  
Surgical Removal ◽  
Outpatient Basis ◽  
Review Of Literature ◽  
Medial Aspect ◽  
Clinical Presentations ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship

Pilomatrixoma, or calcific epithelioma of Malherbe, is a rare benign subcutaneous tumor of adnexal origin. Females are twice as affected as males. The authors carry out a review of the literature on the subject and present a clinical case. It is a 60-year-old patient with this type of tumor on the medial aspect of her left leg, who was operated on an outpatient basis two years ago and currently has no recurrence. Diagnosis is often difficult to make clinically, and therefore can only be definitively established after histopathological examination of the lesion after surgical removal. Ultrasound role is to validate the clinical diagnosis, exclude pathologies with similar clinical presentations, and establish the relationship of the lesion with the surrounding structures.

scholarly journals An interesting case of Cysticercus fasciolaris infesting the Brown Rat

Parasitology ◽  
1922 ◽  
Vol 14 (1) ◽  
pp. 14-14
Author(s):  
A. T. Hopwood
Keyword(s):  
Larval Stage ◽  
Interesting Case ◽  
Cysticercus Fasciolaris ◽  
Brown Rat ◽  
The Common ◽  
Taenia Taeniaeformis ◽  
Apparently Healthy

Cysticercus Fasciolaris, the larval stage of the common tapeworm Taenia taeniaeformis (T. crassicolis), was recently found in great numbers in the liver of a brown rat. The rat measured 18 cm. in length and weighed about 275 g.; it was vigorous and apparently healthy when caught, but when killed and examined, its liver was found to be heavily infested with the cysticerci.

scholarly journals Fibrosarcomas in Two Rats Arising from Hepatic Cysts of Cysticercus fasciolaris

1995 ◽  
Vol 32 (4) ◽  
pp. 441-444 ◽  
Author(s):  
M. A. Hanes
Keyword(s):  
Electron Microscopy ◽  
Light Microscopy ◽  
Pleural Cavity ◽  
Sprague Dawley ◽  
Hepatic Cysts ◽  
Multiple Organs ◽  
Sprague Dawley Rats ◽  
Cysticercus Fasciolaris ◽  
Chronic Inflammatory Reaction ◽  
Taenia Taeniaeformis

Two of five male Sprague-Dawley rats with hepatic tapeworm cysts developed large multinodular fibrosarcomas. Fibrosarcomas enveloped tapeworm cysts, invaded the serosa of multiple organs, and extended through the diaphragm into the pleural cavity. Light microscopy, immunohistochemistry, and electron microscopy supported the diagnosis of fibrosarcoma. The parasites were identified as Cysticercus fasciolaris, the larval stage of Taenia taeniaeformis. The development of sarcomas in rats induced by Taenia sp. is thought to be attributable to the chronic inflammatory reaction of the capsule. There are parallels between these and other tumors occurring in mice and cats with suggested chronic inflammatory etiologies.

scholarly journals Cysticercus fasciolaris (Taenia taeniaeformis Larval Stage) in Urban Rats with Illustration of Histopathological Changes in the Liver

2017 ◽  
Vol 5 (3) ◽  
pp. 43-46
Author(s):  
Hamid Hasanpour ◽  
Faezeh Najafi ◽  
Mohammad Javad Gharagozlou ◽  
Sanaz Jafarpour Azami ◽  
Arezoo Fadavi ◽  
...  
Keyword(s):  
Larval Stage ◽  
Histopathological Changes ◽  
Cysticercus Fasciolaris ◽  
Taenia Taeniaeformis

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Skeletal elements of crinoid echinoderms: High-resolution structural and microanalytical results

1983 ◽  
Vol 41 ◽  
pp. 194-195
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor
Keyword(s):  
High Resolution ◽  
Marine Invertebrates ◽  
Sea Urchins ◽  
Structural Features ◽  
Sea Stars ◽  
High Resolution Tem ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.

Studies on Leukemogenic and Sarcomagenic Viruses

1970 ◽  
Vol 28 ◽  
pp. 156-157
Author(s):  
Leon Dmochowski
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Morphological Properties ◽  
Mode Of Development ◽  
Relationship Of ◽  
The Relationship

Electron microscopy has proved to be an invaluable discipline in studies on the relationship of viruses to the origin of leukemia, sarcoma, and other types of tumors in animals and man. The successful cell-free transmission of leukemia and sarcoma in mice, rats, hamsters, and cats, interpreted as due to a virus or viruses, was proved to be due to a virus on the basis of electron microscope studies. These studies demonstrated that all the types of neoplasia in animals of the species examined are produced by a virus of certain characteristic morphological properties similar, if not identical, in the mode of development in all types of neoplasia in animals, as shown in Fig. 1.

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