scholarly journals First record of Calodium hepaticum and Taenia taeniaeformis liver infection in wild Norway rats (Rattus norvegicus) in Serbia

2010 ◽  
Vol 62 (2) ◽  
pp. 431-440 ◽  
Author(s):  
Milena Kataranovski ◽  
Lidija Zolotarevski ◽  
Sandra Belij ◽  
Ivana Mirkov ◽  
Jelena Stosic ◽  
...  
Keyword(s):  
Rattus Norvegicus ◽  
Geographic Area ◽  
First Record ◽  
Helminth Species ◽  
Total Prevalence ◽  
New Information ◽  
Calodium Hepaticum ◽  
Taenia Taeniaeformis ◽  
Norway Rats ◽  
Liver Infection

The nematode Calodium hepaticum and the cestode Taenia taeniaeformis are zoonotic helminths primarly found in the liver of common wild rats. Most reports on these helminth species with cosmopolitan distribution are from Asia, and there is paucity of data for Europe. Wild Norway rats (Rattus norvegicus) from urban and suburban habitats of the Belgrade area were examined for the presence of Calodium hepaticum and Taenia taeniaeformis larvae liver infections. The presence of visible cysts and a histomorphology of parasite-related inflammatory liver responses were sought as signs of infection. The total prevalence of infection was 10.9% (C. hepaticum) and 29.9% (T. taeniaeformis), with no differences between the sexes. No difference in the annual prevalence of both helminth species was noted. Data obtained in this study provide new information relevant to wild Norway rats as sources of C. hepaticum and T. taeniaeformis liver infection in this geographic area, and, in a wider context, in Europe. .

Antibody responses against Echinococcus multilocularis antigens in naturally infected Rattus norvegicus

1996 ◽  
Vol 70 (4) ◽  
pp. 355-357 ◽  
Author(s):  
A. Ito ◽  
M. Okamoto ◽  
H. Kariwa ◽  
T. Ishiguro ◽  
A. Hashimoto ◽  
...  
Keyword(s):  
Immune Response ◽  
Intermediate Host ◽  
Echinococcus Multilocularis ◽  
Rattus Norvegicus ◽  
Wistar Rats ◽  
Antibody Responses ◽  
Cestode Species ◽  
Capillaria Hepatica ◽  
Taenia Taeniaeformis ◽  
Norway Rats

AbstractTwo Norway rats, Rattus norvegicus, were found to be naturally infected with Echinococcus multilocularis in Japan. One of them was simultaneously infected with at least three different sized metacestodes of Taenia taeniaeformis. These two R. norvegicus rats and another R. norvegicus naturally infected with T. taeniaeformis and Capillaria hepatica were examined to see if they showed any antibody responses against these two cestode parasites with the view to obtaining more information on the importance of rats as the intermediate host for E. multilocularis. These R. norvegicus showed very poor antibody responses against the two cestode species, although the Wistar rats, R. rattus, experimentally infected with a single smaller sized metacestode of T. taeniaeformis showed stronger responses not only against T. taeniaeformis but also against E. multilocularis. Therefore the three R. norvegicus naturally infected with E. multilocularis and/or T. taeniaeformis demonstrated virtually no immune response, at least against these cestodes.

scholarly journals Factors affecting carriage and intensity of infection of Calodium hepaticum within Norway rats (Rattus norvegicus) from an urban slum environment in Salvador, Brazil

2016 ◽  
Vol 145 (2) ◽  
pp. 334-338 ◽  
Author(s):  
R. WALKER ◽  
T. CARVALHO-PEREIRA ◽  
S. SERRANO ◽  
G. PEDRA ◽  
K. HACKER ◽  
...  
Keyword(s):  
Rattus Norvegicus ◽  
Significant Risk ◽  
Urban Slum ◽  
Mammalian Host ◽  
Intensity Of Infection ◽  
Tropical Regions ◽  
Factors Affecting ◽  
Calodium Hepaticum ◽  
Norway Rats ◽  
Slum Areas

SUMMARYUrban slum environments in the tropics are conducive to the proliferation and the spread of rodent-borne zoonotic pathogens to humans. Calodium hepaticum (Brancroft, 1893) is a zoonotic nematode known to infect a variety of mammalian hosts, including humans. Norway rats (Rattus norvegicus) are considered the most important mammalian host of C. hepaticum and are therefore a potentially useful species to inform estimates of the risk to humans living in urban slum environments. There is a lack of studies systematically evaluating the role of demographic and environmental factors that influence both carriage and intensity of infection of C. hepaticum in rodents from urban slum areas within tropical regions. Carriage and the intensity of infection of C. hepaticum were studied in 402 Norway rats over a 2-year period in an urban slum in Salvador, Brazil. Overall, prevalence in Norway rats was 83% (337/402). Independent risk factors for C. hepaticum carriage in R. norvegicus were age and valley of capture. Of those infected the proportion with gross liver involvement (i.e. >75% of the liver affected, a proxy for a high level intensity of infection), was low (8%, 26/337). Sixty soil samples were collected from ten locations to estimate levels of environmental contamination and provide information on the potential risk to humans of contracting C. hepaticum from the environment. Sixty percent (6/10) of the sites were contaminated with C. hepaticum. High carriage levels of C. hepaticum within Norway rats and sub-standard living conditions within slum areas may increase the risk to humans of exposure to the infective eggs of C. hepaticum. This study supports the need for further studies to assess whether humans are becoming infected within this community and whether C. hepaticum is posing a significant risk to human health.

scholarly journals PREVALENCE OF Calodium hepaticum (SYN. Capillaria hepatica) IN Rattus norvegicus IN THE URBAN AREA OF RIO DE JANEIRO, BRAZIL

2014 ◽  
Vol 56 (5) ◽  
pp. 455-457 ◽  
Author(s):  
Raquel O. Simões ◽  
José L. Luque ◽  
Marta Júlia Faro ◽  
Ester Motta ◽  
Arnaldo Maldonado JR.
Keyword(s):  
Human Health ◽  
Urban Area ◽  
Rattus Norvegicus ◽  
Liver Tissue ◽  
Rio De Janeiro ◽  
Capillaria Hepatica ◽  
Total Prevalence ◽  
Calodium Hepaticum ◽  
Substantial Risk ◽  
Yellowish White

The nematode Calodium hepaticum (syn. Capillaria hepatica) is a zoonotic helminth found mainly infecting rats. It was studied the prevalence of C. hepaticum infection in Rattus norvegicus in an urban area of Rio de Janeiro (Brazil), with low urban planning and sanitation. The presence of C. hepaticum was identified through visible yellowish-white lesions in liver tissue and histological analyses. The total prevalence of infection was 45%, with no significant differences between sex and age. The presence of infected rodents near the peridomestic area poses substantial risk to human health.

scholarly journals Helminths of the brown rat (Rattus norvegicus) (Berkenhout, 1769) in the city of Palermo, Italy

2010 ◽  
Vol 47 (4) ◽  
pp. 238-240 ◽  
Author(s):  
C. Milazzo ◽  
A. Ribas ◽  
J. Casanova ◽  
M. Cagnin ◽  
F. Geraci ◽  
...  
Keyword(s):  
Rattus Norvegicus ◽  
Infection Intensity ◽  
Helminth Species ◽  
Hymenolepis Diminuta ◽  
Nippostrongylus Brasiliensis ◽  
Syphacia Muris ◽  
Brown Rat ◽  
Males And Females ◽  
Taenia Taeniaeformis ◽  
The City

AbstractA helminthological survey was performed on 143 brown rats (Rattus norvegicus) from the city of Palermo (Italy). The overall prevalence of helminth infection was 98.60 %. The following parasites were found: Brachylaima sp. (prevalence 8.39 %) (Trematoda); Taenia taeniaeformis larvae (11.89 %), Rodentolepis nana (13.29 %), Hymenolepis diminuta (24.48 %) (Cestoda); Gongylonema sp., (4.90 %), Syphacia muris (8.39 %), Nippostrongylus brasiliensis (18.88 %), Eucoleus gastricus (30.07 %), Mastophorus muris (30.77 %), Capillaria hepatica (54.55 %), Heterakis spumosa (82.52 %) (Nematoda) and one acanthocephalan (0.70 %). The species found in males were also present in females, with the exception of the acanthocephalan. No significant differences were found between males and females in prevalence (P%) or mean infection intensity (MI). However, a significant correlation between both P% and MI, as well as host age, was observed in some helminth species. Hosts were infected by one to six helminth species (median = 3). This is the first report from Sicily of helminths in R. norvegicus.

Echinoderes unispinosus (Kinorhyncha: Cyclorhagida), a new record from deep-sea sediments in the Gulf of Mexico

Zootaxa ◽  
2020 ◽  
Vol 4821 (1) ◽  
pp. 196-200 ◽  
Author(s):  
LUCIA ÁLVAREZ-CASTILLO ◽  
DIEGO CEPEDA ◽  
FERNANDO PARDOS ◽  
GERARDO RIVAS ◽  
AXAYÁCATL ROCHA-OLIVARES
Keyword(s):  
Gulf Of Mexico ◽  
Deep Sea ◽  
Gulf Of California ◽  
Geographic Area ◽  
First Record ◽  
Adult Males ◽  
Worldwide Distribution ◽  
New Information ◽  
Tropical Weather ◽  
Relationship Of

Kinorhyncha is a phylum of exclusively marine, meiofaunal invertebrates (Sørensen & Pardos 2008). Currently, the knowledge about the worldwide distribution of most of its species is considerably patchy, as several taxa have been reported from a single or few localities, usually within a limited geographic area (Sørensen & Pardos 2008; Yamasaki et al. 2018a). This even becomes more evident for deep-sea kinorhynchs, as noticed by Sørensen et al. (2018). Given the particular value of new records from the deep-sea to increase our understanding in the distribution of meiofaunal organisms plus the observed relationship of morphological variation through the bathymetric gradient, we aim to report the first record of Echinoderes unispinosus Yamasaki, Neuhaus & George, 2018 in the southern edge of the Gulf of Mexico (GoM), and contribute with new information about the morphological intraspecific variation of this species. In Mexico, studies of kinorhynch biodiversity are limited to the northern Gulf of California (50–1570m depth) (Álvarez-Castillo et al. 2015, 2018; Cepeda et al. 2019) and the Yucatán Peninsula (Sánchez & Martínez 2019). The GoM is a semi-closed basin located in a transition zone with both subtropical and tropical weather. Deep-sea muddy sediment samples of the present study were collected during the expedition XIXIMI-5 (10–24 June 2016) and processed according to Cisterna-Céliz et al. (2019). Kinorhynch specimens were mounted, measured and photographed according to Cepeda et al. (2019). Two adult males were identified as E. unispinosus, one from station B11 (2298 m depth) and another from station B15 (3708m depth). Kinorhynch specimens were deposited at the Aquatic Invertebrates Collection of the Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Mexico, under accession numbers: KGM.001 and KGM.002.

scholarly journals Field trials of flocoumafen against warfarin-resistant infestations of the Norway rat (Rattus norvegicus Berk)

1986 ◽  
Vol 96 (3) ◽  
pp. 467-473 ◽  
Author(s):  
A. P. Buckle
Keyword(s):  
Rattus Norvegicus ◽  
Field Trials ◽  
Anticoagulant Rodenticide ◽  
Complete Control ◽  
Norway Rat ◽  
Norway Rats ◽  
Farm Buildings

SUMMARYThe anticoagulant rodenticide flocoumafen was tested against warfarin-resistant Norway rats (Rattus norvegicus Berk.) infesting farm buildings. Complete control was obtained in 10–21 days (mean 14·2 days) in six treatments in which baits poisoned with 0·005% flocoumafen were maintained, in surplus, until rats ceased to feed from them. A further six treatments, in which the application of poisoned bait was restricted to periodic placements of 50 g, were also completely successful in 15–30 days (mean 21·0 days). Less poisoned bait was used in the restricted flocoumafen treatments than in the unrestricted treatments but the time taken to control the rat infestations was significantly longer.

scholarly journals New record of Allamanda blanchetti Kunth (Apocynaceae) for the Brazilian Atlantic Forest

2021 ◽  
Vol 5 (3) ◽  
pp. 112
Author(s):  
Diego Santos ◽  
Swami Leitão Costa ◽  
Francisco Carlos Pinheiro Costa
Keyword(s):  
Atlantic Forest ◽  
New Record ◽  
Conservation Status ◽  
First Record ◽  
Brazilian Atlantic Forest ◽  
Information Distribution ◽  
Upland Forest ◽  
Distribution Maps ◽  
New Information ◽  
Status Assessment

This study report the first record of Allamanda blanchetii Kunth in the Atlantic Forest, Brazil. This species was collected from an upland forest in Semi-deciduous Seasonal Forest. This occurrence adds new information about the distribution of this species and expands its range to Brazil, which is important for its conservation. We provide taxonomic information, distribution maps, conservation status assessment, photograps, and an identification key for the Allamanda L. species in the Atlantic Forest.

scholarly journals Mammalia, Rodentia, Sigmodontinae Wagner, 1843: new Locality records, filling gaps and geographic distribution maps from La Rioja province, northwestern Argentina

Check List ◽  
2011 ◽  
Vol 7 (5) ◽  
pp. 614
Author(s):  
J. Pablo Jayat ◽  
Pablo E. Ortiz ◽  
Rodrigo González ◽  
Rebeca Lobo Allende ◽  
M. Carolina Madozzo Jaén
Keyword(s):  
Geographic Distribution ◽  
New Records ◽  
First Record ◽  
Northwestern Argentina ◽  
Distribution Maps ◽  
New Information ◽  
Pellet Analysis ◽  
Low Altitude ◽  
La Rioja

Sigmodontine rodents are well represented in northwestern Argentina, but information regarding their distribution in La Rioja is scarce. We add new information for seven species from seven localities in the Famatina range. These new records were obtained using both captures and owl pellet analysis. We cite the first record of Neotomys ebriosus in La Rioja. The collection locality is unusual for this species because of its low altitude and xeric conditions. Other notable results include the second record of Abrothrix andinus and of the genus Oligoryzomys at the province. 

scholarly journals Notes on the distribution of Gastrotheca testudinea (Jiménez de la Espada, 1870) in Ecuador

2017 ◽  
Author(s):  
Verónica L. Urgilés ◽  
Juan Carlos Sánchez-Nivicela ◽  
Diego F Cisneros-Heredia
Keyword(s):  
First Record ◽  
Elevation Range ◽  
The Third ◽  
New Information

We present new information on the distribution of the marsupial frog Gastrotheca testudinea (Jiménez de la Espada, 1870) in Ecuador. We provide the first record from the province of Cañar, and the country’s southernmost locality (which also corresponds to the third known report from the province of Zamora-Chinchipe). In addition, we discuss the validity of the locality of Loreto for this species. Based on this discussion, we review the elevation range of the species and propose to change the lowest elevation limit of Gastrotheca testudinea from 1100 to 700 m.

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