scholarly journals Identificación morfológica y molecular de Cysticercus fasciolaris aislado de un roedor (Rattus norvegicus) de la provincia de Buenos Aires (Argentina)

2013 ◽  
Vol 45 (3) ◽  
pp. 150-153
Author(s):  
Mara L. Martínez ◽  
Mariana G. Domínguez ◽  
Gabriel E. Morici ◽  
Regino Cavia ◽  
Daniela P. Montes de Oca ◽  
...  
Keyword(s):  
Rattus Norvegicus ◽  
Buenos Aires ◽  
Cysticercus Fasciolaris

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 CONNECTIVITY AMONG NORWAY RAT SUBPOPULATIONS (RATTUS NORVEGICUS) AT POULTRY FARMS IN EXALTACIÓN DE LA CRUZ, BUENOS AIRES, ARGENTINA

2019 ◽  
Vol 26 (2) ◽  
pp. 359-367
Author(s):  
Isabel E. Gómez Villafañe ◽  
Noelia Guzmán ◽  
Natalia Ortiz ◽  
Raúl E. González-Ittig ◽  
Vanina. A. León ◽  
...  
Keyword(s):  
Rattus Norvegicus ◽  
Buenos Aires ◽  
Norway Rat ◽  
Poultry Farms

scholarly journals Factores ecoambientales relacionados con potenciales reservorios de Leptospira spp. en la Reserva Ecológica Costanera Sur, Buenos Aires, Argentina

2021 ◽  
Vol 1 (43) ◽  
pp. 19-20
Author(s):  
Yanina Berra ◽  
Gastón Arocena ◽  
Carolina Artuso ◽  
Jessica Petrakovsky ◽  
Marcela Orozco ◽  
...  
Keyword(s):  
Rattus Norvegicus ◽  
Buenos Aires ◽  
Leptospira Spp ◽  
Oligoryzomys Flavescens ◽  
Didelphis Albiventris

Las modificaciones ambientales generan entornos de interfaz en los que la transmisión de Leptospira spp. puede verse afectada. Con el objetivo de identificar y analizar variables ecoambientales asociadas a potenciales reservorios de Leptospira spp. en la Reserva Ecológica Costanera Sur (RECS) (Buenos Aires, Argentina) y áreas urbanizadas contiguas, se realizó un muestreo por conveniencia en líneas transectas, estratificado y proporcionado. Fueron capturados 170 mamíferos de 11 especies y se analizó la presencia de Leptospira spp. por serología, cultivo y PCR. En áreas conservadas, se registraron mayormente Didelphis albiventris y Deltamys kempi, mientras que el Oligoryzomys flavescens también fue hallado en áreas degradadas, y la Rattus norvegicus solo fue encontrada en áreas degradadas. No se detectó Leptospira spp. en los mamíferos silvestres. Un perro sin tenedor responsable resultó positivo por ser0ología. Las condiciones ambientales de la RECS sugieren un ecosistema poco propicio para Rattus, evidenciando la importancia de la conservación de áreas naturales en entornos urbanos.

scholarly journals Endoparasite community of Rattus norvegicus captured in a shantytown of Buenos Aires City, Argentina

2011 ◽  
Vol 48 (3) ◽  
pp. 167-173 ◽  
Author(s):  
D. Hancke ◽  
G. Navone ◽  
O. Suarez
Keyword(s):  
Urban Area ◽  
Rattus Norvegicus ◽  
Parasite Species ◽  
Buenos Aires ◽  
The Public ◽  
Potential Reservoir ◽  
Brown Rat ◽  
Zoonotic Parasites ◽  
Buenos Aires City

AbstractThe aim of this study was to evaluate the role of the brown rat (Rattus norvegicus) as a potential reservoir of zoonotic parasites in an urban area of Argentina. A parasitological survey in 40 brown rats trapped in a shantytown of Buenos Aires City was carried out. 97.5 % of the analyzed rats were parasitized with at least one of the 12 species of helminth or protozoan species recorded. Among the species identified, Hymenolepis nana is recognized as one of the most common human helminthes parasites. The average number of parasite species was higher in males than females rats, and in the last case, a direct relationship between parasite species richness and host’s body size was recorded. Variations in endoparasite community throughout the year seasons were recorded, probably related to environmental factors, which limits the performance of the life cycle of different parasite species. The presence of zoonotic endoparasites confirms R. norvegicus as a reservoir for different types of pathologies, which, therefore, represents a risk to the public health in an overcrowded urban area.

scholarly journals Cysticercus fasciolaris infection in wild rats (Rattus norvegicus) in Korea and formation of cysts by remodeling of collagen fibers

2016 ◽  
Vol 28 (3) ◽  
pp. 263-270 ◽  
Author(s):  
Byung-Woo Lee ◽  
Byung-Suk Jeon ◽  
Hak-Soo Kim ◽  
Hyeon-Cheol Kim ◽  
Byung-Il Yoon
Keyword(s):  
Rattus Norvegicus ◽  
Collagen Fibers ◽  
Cysticercus Fasciolaris ◽  
Wild Rats

The anatomy of Cysticercus taeniae-taeniaeformis (Batsch 1786) (Cysticercus fasciolaris Rud. 1808), from the liver of Rattus norvegicus (Erx.), including an account of spiral torsion in the species and some minor abnormalities in structure

Parasitology ◽  
1951 ◽  
Vol 41 (1-2) ◽  
pp. 46-59 ◽  
Author(s):  
Gwendolen Rees
Keyword(s):  
Nervous System ◽  
Rattus Norvegicus ◽  
Neck Region ◽  
Internal Organs ◽  
Nervous Systems ◽  
Complicated System ◽  
Cysticercus Fasciolaris ◽  
Lateral Margins ◽  
Longitudinal Nerve ◽  
Nerve Cords

1. The musculature and excretory and nervous systems of Cysticercus taeniae-taeniaeformis are described.2. The nervous system consists often longitudinal nerve cords in the strobila and of a brain and complicated system of nerves in the scolex. The nervous system of the scolex shows several variations on the earlier description by Bartels (1902).3. Minor abnormalities have been found in the form of multiplication of the lateral margins and duplication of the ventral excretory vessels.4. Three specimens showed spiral torsion of the internal organs involving the musculature and excretory and nervous systems of the strobila. The number of turns of the spiral and the positions of the chiasmata are variable. It is suggested that the spiral twisting occurs before growth and strobilation in the neck region has begun, the chiasmata being carried back as new segments are formed.

scholarly journals Prevalence of hantavirus infection in wild Rattus norvegicus and R. rattus populations of Buenos Aires City, Argentina

2008 ◽  
Vol 13 (1) ◽  
pp. 46-51 ◽  
Author(s):  
Gerardo Rubén Cueto ◽  
Regino Cavia ◽  
Carla Bellomo ◽  
Paula Julieta Padula ◽  
Olga Virginia Suárez
Keyword(s):  
Rattus Norvegicus ◽  
Buenos Aires ◽  
Hantavirus Infection ◽  
Buenos Aires City

Open discussion

1982 ◽  
Vol 99 ◽  
pp. 605-613
Author(s):  
P. S. Conti
Keyword(s):  
Buenos Aires ◽  
Large Mass ◽  
List Type ◽  
Common Phenomenon ◽  
Open Discussion ◽  
The Stability ◽  
Ring Nebulae

Conti: One of the main conclusions of the Wolf-Rayet symposium in Buenos Aires was that Wolf-Rayet stars are evolutionary products of massive objects. Some questions:–Do hot helium-rich stars, that are not Wolf-Rayet stars, exist?–What about the stability of helium rich stars of large mass? We know a helium rich star of ∼40 MO. Has the stability something to do with the wind?–Ring nebulae and bubbles : this seems to be a much more common phenomenon than we thought of some years age.–What is the origin of the subtypes? This is important to find a possible matching of scenarios to subtypes.

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