hymenolepis nana
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2022 ◽  
Vol 45 (2) ◽  
pp. 21-25
Author(s):  
Shaymaa A Majeed ◽  
Amer M Al-Amery

The prevalence of house mice (Mus musculus) Hymenolepiasis was determined in Baghdad, Iraq to study the effects of location, sex, and months on the infection rate of Hymenolepis spp. in house mice. Fifty house mice were captured from Abu Ghraib and Al-Ameriya, Baghdad, Iraq and examined for detecting parasites in laboratory in College of Veterinary Medicine, University of Baghdad. The total infection prevalence of intestinal parasites was 11 (22%) out of 50 samples, the higher prevalence was 28.57% and found in Abu Ghraib area, while lower was (13.63%) and recorded in Al-Ameriya area. The study revealed that the house mice were infected with two species of Hymenolepis: Hymenolepis nana 4 (8%) and Hymenolepis diminuta 7(14%). The intestinal parasites revealed a significance prevalence value (P<0.05). There was statistical difference in between males and females in parasites infection, in which the higher rate was 8 (27.58%) and recorded in males and the lower was 3 (14.28%) and observed in females. The monthly distribution of confirmed cases over a 9-month period revealed that reported cases of house mice and Hymenolepiasis increased significantly (P<0.01) in autumn (65.44%), followed by winter (15.38%), and summer (13.33%). The findings showed that house mice play an important role in the spread of zoonotic parasitic illnesses to people, as well as attention must pay to public health.


2022 ◽  
Vol 82 ◽  
Author(s):  
L. F. N. Rocha ◽  
S. S. Rodrigues ◽  
T. B. Santos ◽  
M. F. Pereira ◽  
J. Rodrigues

Abstract Foliar vegetables contaminated with fecal residues are an important route of transmission of intestinal parasites to humans. The aim of this study was to evaluate the presence of parasitic forms of protozoa and helminths on lettuces (Lactuca sativa) and collard greens (Brassica oleracea) sold in street- and supermarkets in the city of Aparecida de Goiânia, Goiás, Brazil. A total of 30 samples of each vegetable (15 samples from each supermarkets and street markets) was analyzed. All samples were processed by spontaneous sedimentation method and centrifugal flotation. In 45% of the samples, immature forms of intestinal parasites were identified with 66.7% helminths eggs and 33.3% protozoan cysts or oocysts. Significantly more lettuce samples were contaminated with eggs, cysts or oocyst of at least one parasite than collard green samples (U=216; Z=-3.45; P <0.001). The parasitic forms were identified morphologically up to the family level with eggs of Ancylostomatidae, Strongyloididae, Ascarididae and Taeniidae, or oocysts of Eimeriidae, to the genus with Cystoisospora sp. and Toxocara sp., and to the species level with Cystoisospora canis, Dipylidium caninum and Hymenolepis nana. The presence of these infective agents in lettuce and collard green from both street- and supermarkets highlights the high risk of spreading parasites by eating raw vegetables sold in Aparecida de Goiânia.


2021 ◽  
Vol 10 (16) ◽  
pp. e96101623551
Author(s):  
Luan Marcelo Gonçalves Leite ◽  
Denise da Costa Boamorte Cortela ◽  
Lucas França de Barros ◽  
Geainny Gomes de Souza ◽  
Andernice dos Santos Zanetti ◽  
...  

As enteroparasitas são comuns em indivíduos que se encontram sob condições precárias de moradia, água potável, saneamento básico e higiene. O objetivo deste trabalho é verificar a prevalência de enteroparasitas em crianças em fase escolar do assentamento/comunidade Paiol, no município de Cáceres-MT. Análises parasitológicas pelo método de Hoffman, além dos dados socioeconômicos e ambientais foram realizadas em 75 amostras de crianças com idade de 7 a 16 anos. A prevalência geral de enteroparasitas foi de 56% na população estudada. Protozoários foram identificados em 98% das amostras positivas sendo Blastocystis hominis o mais prevalente seguido de Endolimax nana, Entamoeba coli e Giardia lamblia. Helmintos foram identificados em 5% do total de amostras analisadas, sendo Trichuris trichiura e Hymenolepis nana os únicos identificados. Conclui-se que há elevada prevalência de enteroparasitas nas crianças, principalmente de protozoários intestinais, sendo necessária melhorias e monitoramento das condições higiênico-sanitárias em comunidades rurais da região estudada.


2021 ◽  
Vol 8 (2) ◽  
pp. 44-52
Author(s):  
Luis Alarcón (†) ◽  
Evangelina Terán Ventura

Introducción: La parasitosis intestinal constituye una de las infecciones más comunes a nivel mundial, de mayor prevalencia en países poco desarrollados. El objetivo es comparar la prevalencia de enteroparásitos en niños de Huaricana y Viacha de La Paz, Bolivia. Metodología: Se colectaron muestras de heces de niños de 4 -11 años de los colegios de Huaricana (H) y Viacha (V). Para determinar la presencia de enteroparásitos, se utilizó la técnica modificada de concentración de Willis y Ritchie. Resultados: La prevalencia de enteroparásitos fue de más del 80 % para H y 44 % para V. Las especies de helmintos que fueron encontrados son: Hymenolepis nana (H: 20 %, V: 0 %), Ascaris lumbricoides (H: 4 %, V: 4 %), Enterobius vermicularis (H: 5 %, V: 0 %), Taenia spp. (H: 4 %, V: 0 %), Diphylidium spp. (H:4 %, V:0 %), y entre los protozoos se encontraron Giardia lamblia (H:18 %, V:4 %), Blastocystis hominis (H:22 %, V:6 %), Entamoeba coli (H:51 %, V:28 %), Chilomastix mensnili (H:12 %, V:2 %), Endolimax nana (H:0 %, V:6 %) y Iodamoeba butschili (H: 14 %, V: 2 %). Los enteroparásitos patógenos predominantes en Huaricana fueron Hymenolepis nana 20 % y Giardia lamblia 18 %; y en Viacha 4 % se encontraron Ascaris lumbricoides y Giardia lamblia. Los niños de Huaricana estaban poliparasitados en 20 %, y biparasitados en 25 %, y los niños de Viacha estaban biparasitados en 19 %. Conclusión: Los niños con mayor prevalencia de enteroparásitos pertenecen a Huaricana. Las especies patógenas de enteroparásitos prevalentes en niños de Huaricana fue Hymenolepis nana, Giardia lamblia y de Viacha fue Ascaris lumbricoides y Giardia lamblia. Los niños de Huaricana estaban poliparasitados y los de Viacha estaban biparasitados. Conflicto de intereses Ninguno 


2021 ◽  
Vol 8 (11) ◽  
pp. e00709
Author(s):  
Roohi Patel ◽  
Peter Dellatore ◽  
Colton Smith ◽  
Anish Vinit Patel
Keyword(s):  

2021 ◽  
Vol 26 (5) ◽  
pp. 935-943
Author(s):  
Juscelino Alves Henriques ◽  
Rui de Oliveira ◽  
Monica de Amorim Coura ◽  
Marcelo Libânio ◽  
Márcio Benedito Baptista

RESUMO A concepção dos sistemas de drenagem de águas pluviais como separador absoluto é uma característica marcante na gestão das águas urbanas, no entanto não é o reflexo da realidade de tal sistema na maioria das cidades brasileiras, onde frequentemente esgotos e águas pluviais escoam pelos mesmos condutos. Diante disso, o objetivo do presente trabalho foi investigar as contribuições de contaminação fecal dos canais de drenagem afluentes ao Canal do Prado, pertencentes ao sistema de macrodrenagem de águas pluviais da cidade de Campina Grande, na Paraíba. Para a realização da pesquisa de campo, foram definidos sete pontos de monitoramento ao longo do canal e, como indicadores de contaminação fecal, coliformes termotolerantes, Escherichia coli e os ovos dos helmintos Ascaris lumbricoides, Taenia sp, Hymenolepis nana, Hymenolepis diminuta, Enterobius vermicularis, Ancilostomideo sp e Trichuris sp. Os resultados apontaram que ovos de Ascaris lumbricoides foram os que apresentaram maior frequência nos pontos de monitoramento, relacionados à maior descarga de esgotos sanitários. Tais descargas também foram verificadas por elevados valores médios de coliformes termotolerantes que atingiram até 1,6 x 107 UFC.100 mL-1, valor típico de esgoto sanitário. Escherichia coli ocorreu em mais de 90% das amostras coletadas em todos os pontos de monitoramento.


Author(s):  
Fotseu Kouam Arnold Landry ◽  
Ajeagah Gideon Aghaindum ◽  
Amoah Isaac Dennis ◽  
Okoa Amougou Thérèse Nadège ◽  
Tsomene Namekong Pierre

Abstract Hymenolepis nana is responsible for many parasitic infections in tropical areas, with its persistence in aquatic environments as major contributory factor. A study aimed at demonstrating the effectiveness of some disinfectants on the viability of Hymenolepis nana eggs was conducted in microcosm. Sampling consisted of taking wastewater and sewage sludge samples in sterilized containers and then transporting to the laboratory of Hydrobiology and Environmental Sciences for the determination of Hymenolepis nana eggs using standard protocols. The experimental set-up consisted of five replicates, four tests and a control. The test samples were successively treated with four disinfectants (calcium chlorite, hydrogen peroxide, gypsum and sodium hypochlorite). The physico-chemical parameters were measured before and after disinfection. The samples were then observed under an optical microscope after concentration of the sample through sedimentation and McMaster technique. The viability of the eggs was determined using incubation and staining techniques. The analysis revealed that, the selected disinfectants significantly reduced the physico-chemical parameters with an average yield ranging from 79.24 ± 19.43% to 99.24 ± 1.47%). These physico-chemical parameters can significantly influence the treatment of Hymenolepis nana eggs either by absorbing the disinfectant or by constituting a protective barrier for the eggs, and the physico-chemical nature of the disinfectant strongly influences the formation of disinfection by-products. Calcium chlorite showed a greater effectiveness in reducing eggs viability with efficiency rates of 93.12 ± 9.12% followed by hydrogen peroxide (89.57 ± 14.55%), sodium hypochlorite (82.51 ± 14.39%) and gypsum (80.85 ± 12.88%). The results obtained with gypsum are almost similar to those obtained with other disinfectants (calcium chlorite, hydrogen peroxide and sodium hypochlorite) and clearly show that this disinfectant can be used in water treatment because, unlike other chemical disinfectants, it has no known toxic effects.


2021 ◽  
pp. 030098582110425
Author(s):  
Esther E. V. Crouch ◽  
Charlotte Hollinger ◽  
Stephanie Zec ◽  
Denise McAloose

The cestode Hymenolepis nana is a common parasite of humans and mice. Fecal shedding in the absence of clinical disease has previously been reported in ring-tailed lemurs ( Lemur catta). This report describes fatal, disseminated H. nana cestodiasis infection in an aged ring-tailed lemur in a zoological collection. The parasites were associated with severe multifocal to coalescing and regionally extensive pyogranulomatous hepatitis and moderate multifocal pneumonia. The morphology of the parasites was highly unusual. Profiles were variably sized, ellipsoid to irregularly serpiginous, lined by a thin tegument, and filled with lightly eosinophilic fibrillar stroma and numerous, round basophilic cells. Polymerase chain reaction targeting a portion of the 18S rRNA gene and DNA sequencing of the amplicon showed 100% homology with H. nana.


2021 ◽  
Author(s):  
Geneva Carla S. Chavez ◽  
Vachel Gay Paller ◽  
Renee P. Lorica ◽  
Judeline Dimalibot

Abstract The expansion of ecotourism and forest encroachment in the Philippines creates a high-risk interface where human-macaque interactions occur at rates were cross-species transmission of disease may occur more frequently than previously known. Puerto Princesa Subterranean River National Park is a prime tourist destination in the country where long-tailed macaques live as commensals to humans. This study was conducted to assess zoonotic enteroparasites of Macaca fascicularis to determine their prevalence in the extant population. Fecal samples were collected during two-kilometer transect walks whilst opportunistic sampling was also conducted in the park proper where there is high tourist traffic. Among protozoans, Entamoeba coli showed the highest prevalence (34.29%), followed by Entamoeba spp. and Iodamoeba butschlii (31.43%), Endolimax nana (28.57%), Blastocystis sp. (22.86%), Chilomastix mesnili Entamoeba polecki (20%), and Giardia intestinalis (8.57%). From the helminth group, hookworm larva was the most prevalent (40%), followed by hookworm/strongylids ova (34.29%), Strongyloides sp. larva (28.57%), T. trichiura (20%), Ascaris sp. (11.43%), and lastly, Hymenolepis nana and Enterobius vermicularis (2.86%). This study demonstrates the importance of long-tailed macaques in the transmission of enteroparasites in an environment where there is frequent contact between nonhuman primates and people.


2021 ◽  
Vol 58 (3) ◽  
pp. 248-262
Author(s):  
S. K. Brar ◽  
N. Singla ◽  
L. D. Singla

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.


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