scholarly journals LOS HELMINTOS PARÁSITOS DE RATTUS RATTUS (LINNAEUS, 1758) DE LOS ENTORNOS URBANOS, INTERMEDIOS Y RURALES EN EL SUR DE BRASIL

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Eduardo Oliveira de Araujo ◽  
Mariana De Moura Mendes ◽  
Patrícia Quintana Langone ◽  
Gertrud Müller
Keyword(s):  
Rattus Rattus ◽  
Hymenolepis Diminuta ◽  
Syphacia Obvelata ◽  
Aspiculuris Tetraptera

Rattus rattus tiene hábitos sinantrópicos que lo convierten en el roedor importante para la difusión de parasitos zoonóticos. Treinta individuos fueron capturados y someterse a necropsia con el objetivo de conocer la fauna de helmintos de R. rattus. Se encontraron tres espécies, dos nematodos (Aspiculuris tetraptera y Syphacia obvelata) y uno cestodo (Hymenolepis diminuta). El área rural mostró mayor diversidad de helmintos.

scholarly journals A Survey of Helminth Infections in the Black Rat from Stara Zagora District, Bulgaria

2017 ◽  
Vol 40 (2) ◽  
pp. 177-182 ◽  
Author(s):  
Petar T. Iliev ◽  
Georgi Zh. Georgiev ◽  
Zvezdelina T. Kirkova ◽  
Borislava G. Chakarova
Keyword(s):  
Rattus Rattus ◽  
Hymenolepis Diminuta ◽  
Helminth Parasites ◽  
Hymenolepis Nana ◽  
Trichuris Muris ◽  
Black Rat ◽  
Helminth Infections ◽  
Syphacia Obvelata ◽  
Aspiculuris Tetraptera ◽  
Taenia Taeniaeformis

AbstractA field study was conducted to disclose the prevalence of different helminth parasites in the black rat, Rattus rattus, in some regions of Stara Zagora district, Bulgaria. Out of 67 examined rats, 53 (79.1%) were found to be positive. Helminths of three classes were detected such as Cestoda: Hymenolepis diminuta (47.8%), Hymenolepis nana (43.3%), Taenia taeniaeformis larvae (7.5%), Taenia polyacantha larvae (1.5%); Secernentea: Syphacia obvelata (4.5%), Aspiculuris tetraptera (3.0%) and Adenophorea: Capillaria hepatica (9.0%), Trichuris muris (3.0%). Of all the investigated rats, 27 (40.3%) were infected by one helminth species and 26 (38.8%) by more than one. Hymenolepis diminuta was a predominant species in cases of single infections (23.9%). The most frequent co-infections were observed by H. nana and H. diminuta (16.4%).

scholarly journals Research Note. Occurrence of gastrointestinal helminths in commensal rodents from Tabasco, Mexico

2017 ◽  
Vol 54 (2) ◽  
pp. 170-173 ◽  
Author(s):  
N. Cigarroa-Toledo ◽  
Y. De Los Santos-Martinez ◽  
C. V. Zaragoza-Vera ◽  
M. M. Garcia-Rodriguez ◽  
C. M. Baak-Baak ◽  
...  
Keyword(s):  
Rattus Rattus ◽  
Hymenolepis Diminuta ◽  
Nippostrongylus Brasiliensis ◽  
Gastrointestinal Helminths ◽  
Trichuris Muris ◽  
Heligmosomoides Polygyrus ◽  
Syphacia Muris ◽  
Commensal Rodents ◽  
Syphacia Obvelata ◽  
Moniliformis Moniliformis

Summary The aim of this study was to determine the prevalence and species composition of helminths in commensal rodents captured inside private residences in the city of Villahermosa in Tabasco, Mexico. Trapping was performed at each house for three consecutive nights from October to December 2015. Fifty commensal rodents were captured: 23 Rattus norvegicus, 16 Mus musculus and 11 Rattus rattus. Rodents were transported alive to the laboratory and held in cages until they defecated. Feces were analyzed for helminth eggs using the Sheather’s flotation technique. The overall prevalence of helminths in rodents was 60 %: R. norvegicus was more likely to be parasitized (87.0 %) than R. rattus (63.6 %) and M. musculus (18.8 %). Eggs from at least 13 species of helminths were identified: Hymenolepis diminuta, Rodentolepis nana, Moniliformis moniliformis, Heligmosomoides polygyrus, Heterakis spumosa, Mastophorus muris, Nippostrongylus brasiliensis, Strongyloides ratti, Syphacia obvelata, Syphacia muris, Toxocara sp., Trichosomoides crassicauda, and Trichuris muris. This is the first study to report the presence of H. polygyrus, S. ratti and T. crassicauda in commensal rodents in Mexico. In conclusion, our results suggest that helminths commonly infect commensal rodents in Villahermosa and therefore rodents present a health risk to inhabitants in this region.

scholarly journals New host, geographical records, and factors affecting the prevalence of helminths infection from synanthropic rodents in Yucatán, Mexico

2017 ◽  
Vol 54 (3) ◽  
pp. 231-239 ◽  
Author(s):  
J. A. Panti-May ◽  
E. Palomo-Arjona ◽  
Y. Gurubel-González ◽  
M. A. Torres-Castro ◽  
V. M. Vidal-Martínez ◽  
...  
Keyword(s):  
Rattus Rattus ◽  
Hymenolepis Diminuta ◽  
Urban Site ◽  
Nippostrongylus Brasiliensis ◽  
Rural Settlements ◽  
New Host ◽  
Trichuris Muris ◽  
Factors Affecting ◽  
Syphacia Muris ◽  
Syphacia Obvelata

SummaryThe aim of this paper was to study the occurrence of helminths inMus musculusandRattus rattusfrom urban, suburban and rural settlements in Yucatán, Mexico; and to analyse the host factors (e.g. sex) related to helminths’ distribution. Helminths in a total of 279 rodents were surveyed by visual examination of the liver for metacestodes and faecal examination for helminth eggs using the formalin-ethyl acetate sedimentation technique. The cestodesHydatigera taeniaeformis(metacestodes detected in the liver) andHymenolepis diminuta,and the nematodesAspiculurissp.,Nippostrongylus brasiliensis,Syphacia muris,Syphacia obvelata, andTrichuris muriswere identified. InM. musculus, the prevalence of infection withT. murisandH. taeniaeformiswas higher in the rural village compared to those in the suburban neighbourhood. ForR. rattus, a higher prevalence of infection withH. diminutawas found in the urban site compared to that in the suburban site. This study reports the occurrence ofH. diminutaamong rodents living in close proximity to humans, representing a potential public health risk. In addition, this survey increases our understanding of dynamic transmission among intestinal helminths recorded in Yucatán, Mexico.

scholarly journals Identificación de Parásitos Gastrointestinales en ratas de Lima Metropolitana

2015 ◽  
Vol 26 (2) ◽  
pp. 273 ◽  
Author(s):  
Renzo De Sotomayor C. ◽  
Enrique Serrano-Martínez ◽  
Manuel Tantaleán V. ◽  
Marco Quispe H. ◽  
Gina Casas V.
Keyword(s):  
Rattus Norvegicus ◽  
Rattus Rattus ◽  
Hymenolepis Diminuta ◽  
Syphacia Muris ◽  
Moniliformis Moniliformis ◽  
Aspiculuris Tetraptera

El presente estudio tuvo como objetivo identificar los helmintos gastrointestinales en ratas de Lima Metropolitana, Perú, así como cuantificar la frecuencia de infección, resaltando los resultados de aquellos helmintos de interés zoonótico. Se capturaron 53 Rattus rattus y 20 Rattus norvegicus en cinco zonas urbanas. Los tractos gastrointestinales se procesaron con la técnica de Travassos y las heces se evaluaron por observación directa en el microscopio. El 77.4% de R. rattus y el 100% de R. norvegicus estuvieron infectados con helmintos. En R. rattus se identificaron tres especies de cestodos: Hymenolepis diminuta (39.6%), Rodentolepis fraterna (7.5%) y Raillietina demerariensis (7.5%), seis especies de nematodos: Gongylonema neoplasticum (41.5%), Heterakis spumosa (13.2%), Syphacia muris (11.3%), Strongyloides ratti (15.1%), Aspiculuris tetraptera (11.3%) y Protospirura chanchanensis (3.8%) y una especie de acantocéfalo: Moniliformis moniliformis (32.1%). En R. norvegicus se identificaron dos especies de cestodos: Hymenolepis diminuta (55%) y Rodentolepis fraterna (5%), tres especies de nematodos: Gongylonema neoplasticum (75%), Heterakis spumosa (65%) y Strongyloides ratti (45%) y una especie de acantocéfalo: Moniliformis moniliformis (35%). Los resultados indican que Hymenolepis diminuta y Moniliformis moniliformis fueron los agentes parasitarios de importancia zoonótica más frecuentes.

Effective eradication of pinworms (Syphacia obvelata and Aspiculuris tetraptera) with Polygonum cognatum Meissn

2019 ◽  
Vol 196 ◽  
pp. 63-67 ◽  
Author(s):  
Fatma Tuğçe Gürağaç Dereli ◽  
Mert Ilhan ◽  
Esma Kozan ◽  
Esra Küpeli Akkol
Keyword(s):  
Syphacia Obvelata ◽  
Aspiculuris Tetraptera

scholarly journals Sanitary profile in mice and rat colonies in laboratory animal houses in Minas Gerais: I - Endo and ectoparasites

2007 ◽  
Vol 59 (6) ◽  
pp. 1478-1484 ◽  
Author(s):  
K.A. Bicalho ◽  
F.T.M. Araújo ◽  
R.S. Rocha ◽  
O.S. Carvalho
Keyword(s):  
Physical Environment ◽  
Minas Gerais ◽  
Public Institutions ◽  
Hymenolepis Nana ◽  
Syphacia Muris ◽  
Syphacia Obvelata ◽  
Animal House ◽  
Aspiculuris Tetraptera ◽  
Giardia Muris ◽  
Sanitary Conditions

The sanitary conditions of 13 animal houses in nine public institutions in Minas Gerais, and the presence of endo and ectoparasites of mice and rats colonies kept in these facilities were evaluated. Data about barriers to prevent the transmission of diseases and a program of sanitary monitoring were obtained through a questionnaire and local visit. Parasitological methods were performed for diagnosing mite, lice, helminthes, and protozoa parasites in 344 mice and 111 rats. Data have shown that the majority of the animal houses had neither proper physical environment nor protection barriers to prevent the transmission of infections. Parasitological results have shown that only one animal house (7.7%) had parasite free animals, whereas the others have presented infected animals and the prevalences of parasites in the mice colonies were: Myobia musculi (23.1%); Myocoptes musculinus (38.5%); Radfordia affinis (15.4%); Syphacia obvelata (92.3%); Aspiculuris tetraptera (23.1%); Hymenolepis nana (15.4%); Spironucleus muris (46.2%); Giardia muris (46.2%); Tritrichomonas muris (53.8%); Trichomonas minuta (61.5%); Hexamastix muris (7.7%); and Entamoeba muris (84.6%). As for the rat colonies, the prevalences were: Poliplax spinulosa (8.1%); Syphacia muris (46.2%); Trichosomoides crassicauda (28.6%); Spironucleus muris (85.7%); Tritrichomonas muris (85.7%); Trichomonas minuta (85.7%); Hexamastix muris (14.3%) and Entamoeba muris (85.7%).

scholarly journals Comparative comprehensive analysis on natural infections of Hymenolepis diminuta and Hymenolepis nana in commensal rodents

2021 ◽  
Vol 58 (3) ◽  
pp. 248-262
Author(s):  
S. K. Brar ◽  
N. Singla ◽  
L. D. Singla
Keyword(s):  
Mononuclear Cells ◽  
Rattus Rattus ◽  
Pairwise Alignment ◽  
Hymenolepis Diminuta ◽  
Female Rats ◽  
Intestinal Lumen ◽  
Molecular Characterisation ◽  
Hymenolepis Nana ◽  
Male And Female Rats ◽  
Nuclear Its

Summary This first comprehensive report from Punjab province of India relates to patho-physiological alterations alongwith morpho-molecular characterisation and risk assessment of natural infections of Hymenolepis diminuta and Hymenolepis nana in 291commensal rodents including house rat, Rattus rattus (n=201) and lesser bandicoot rat, Bandicota bangalensis (n=90). Small intestine of 53.61 and 64.95 % rats was found infected with H. diminuta and H. nana, respectively with a concurrent infection rate of 50.86 %. There was no association between male and female rats and H. diminuta and H. nana infections (ᵡ2 = 0.016 and 0.08, respectively, d.f.= 1, P>0.05), while the host age had significant effect on prevalence of H. diminuta and H. nana (ᵡ2 = 28.12 and 7.18, respectively, d.f.= 1, P≤0.05) infection. Examination of faecal samples and intestinal contents revealed globular shaped eggs of H. diminuta without polar filaments (76.50 ± 3.01μm x 67.62 ± 2.42 μm), while smaller sized oval eggs of H. nana were with 4 – 8 polar filaments (47.87 ± 1.95 μm x 36.12 ± 3.05 μm). Cestode infection caused enteritis, sloughing of intestinal mucosa, necrosis of villi and inflammatory reaction with infiltration of mononuclear cells in the mucosa and submucosa. Morphometric identification of the adult cestodes recovered from the intestinal lumen was confirmed by molecular characterisation based on nuclear ITS-2 loci which showed a single band of 269 bp and 242 bp for H. diminuta and H. nana, respectively. Pairwise alignment of the ITS-2 regions showed 99.46 % similarity with sequences of H. diminuta from USA and 100 % similarity with sequences of H. nana from Slovakia, Kosice.

scholarly journals New host record of some gastrointestinal parasites of Irrawaddy squirrel (Callosciurus pygerythrus) from Chittagong, Bangladesh

2018 ◽  
Vol 46 (2) ◽  
pp. 87-103
Author(s):  
Md Afzal Hussain ◽  
Rajib Acharjee ◽  
Benazir Ahmed
Keyword(s):  
Host Specificity ◽  
Parasite Species ◽  
Host Record ◽  
Gastrointestinal Parasites ◽  
Hymenolepis Diminuta ◽  
University Campus ◽  
Gi Tract ◽  
New Host ◽  
New Host Record ◽  
Syphacia Obvelata

Gastrointestinal (GI) tract of 60 Irrawaddy squirrels (Callosciurus pygerythrus) were collected between September 2013 and August 2014 from four different spots of Chittagong University campus and its adjacent areas to study the ento-helminth fauna. Eight different parasite species were identified - one belonging to Cestoda and represented by Hymenolepis diminuta, and the remaining seven were to Nematoda viz., Strongyloides callosciurus, Trichuris ovis, Monodontus sp., Cyclodontostomum purvisi, Moguranema nipponicum, Ascarops talpa and Syphacia obvelata. The nematodes were found as dominant species most preferably inhabiting the small intestine. The present host is the new host record for all of these parasites and S. callosciurus, T. ovis, Monodontus sp., M. nipponicum and A. talpa are the new records for Bangladesh too. All these parasites have very wide host specificity, though most of them are restricted to various rodent hosts but H. diminuta and S. callosciurus were found to have more wider specificity, including other vertebrates too. All identified parasites might have been acquired from the environment where the host inhabits, since host specificity perspective no parasites were found to be specific to the present host. H. diminuta and Syphacia obvelata might have zoonotic role to other wild animals and human and vice versa. Bangladesh J. Zool. 46(2): 87-103, 2018

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