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Parasitology Research

Débora Liliane Walcher, Luis Augusto Xavier Cruz, Paula de Lima Telmo, Lourdes Helena Rodrigues Martins, Luciana Farias da Costa de Avila, Maria Elisabeth Aires Berne, Carlos James Scaini
Human toxocariasis is a neglected global parasitic zoonosis. The efficacy of drug treatment for this disease has been hindered by the biological complexity of the main etiological agent, the nematode Toxocara canis. Experimental studies have shown the potential of probiotics to promote a reduction in the parasite load of T. canis larvae. This study aimed to evaluate the effect of probiotic Lactobacillus rhamnosus ATCC 7469 on the parasite load of BALB/c mice with acute toxocariasis and evaluate the direct effect of this probiotic on T...
December 14, 2017: Parasitology Research
Bing-Wen Xi, Mikuláš Oros, Kai Chen, Jun Xie
A new monozoic cestode, Parabreviscolex niepini n. gen. and n. sp. (Cestoda: Caryophyllidea), is described from the type-host Schizopygopsis younghusbandi Regan, 1905 (Cyprinidae: Schizothoracinae) and Schizothorax waltoni Regan, 1905 (Cyprinidae: Schizothoracinae) in the Yarlung Tsangpo River, the upper tributary of the Brahmaputra River on the Tibetan Plateau. The new genus is placed in the Capingentidae because the vitellarium is situated partly in the medullary and cortical parenchyma, i.e., neither completely external nor internal to inner longitudinal muscles...
December 11, 2017: Parasitology Research
Marcos Tobias de Santana Miglionico, Lúcio André Viana, Helene Santos Barbosa, Ester Maria Mota, Sócrates Fraga da Costa Neto, Edwards Frazão-Teixeira, Paulo Sergio D'Andrea
A total of 53 specimens of the montane grass mouse, Akodon montensis Thomas, 1913 were collected in the Serra dos Órgãos National Park (SONP) in November 2014 and July 2015. The fecal material was analyzed, and a prevalence of 7.5% was recorded for a new coccidian species of the genus Eimeria Schneider, 1875, with part of its endogenous development recorded in the small intestine. The oocysts of a new coccidian species of genus Eimeria are ellipsoidal to subspherical. The wall is bi-layered, c. 1.5 μm (1...
December 11, 2017: Parasitology Research
Maritza Fernandez, Javier Murillo, Luz Amalia Ríos-Vásquez, Rogelio Ocampo-Cardona, David L Cedeño, Marjorie A Jones, Iván D Velez, Sara M Robledo
The physicochemical properties of four N-halomethylated and one non-halomethylated ammonium salts, with proven in vitro antileishmanial activity, were determined according to pharmaceutical standard procedures. The effectiveness and toxicity of these compounds were assessed in hamsters infected with Leishmania (Viannia) braziliensis and compared to that showed by meglumine antimoniate. Animals were followed during 90 days after the completion of treatment. Therapeutic response was determined according to the reduction of size of skin lesions...
December 11, 2017: Parasitology Research
Elisabeth Dorbek-Kolin, Tuuli Åhlberg, Lea Tummeleht, Dennis Tappe, Maria Vang Johansen, Brian Lassen
Taenia solium has been ranked as the most important foodborne parasite and Taenia saginata as the most commonly found human Taenia tapeworm worldwide. The last official reports of taeniosis from Estonia were in 2003 for T. solium and 2012 for T. saginata. By law, all animal cases of cysticercosis must be registered and reported when found. Our aim was to estimate the prevalence of cysticercosis in Estonia caused by T. solium in pigs and T. saginata in cattle. The four slaughterhouses participating in the study slaughter between them approximately 80% of pigs and cattle in Estonia annually...
December 11, 2017: Parasitology Research
Marco Genchi, Carlo Mangia, Nicola Ferrari, Sofia Loukeri
The performance of a rapid immunochromatographic test for the detection of Dirofilaria immitis antigens (Speed Diro™; BVT-Virbac, France) was assessed in 49 experimentally infected dogs and in 244 naturally infected animals; 142 dogs and 102 cats. In experimentally infected dogs, Speed Diro™ showed a sensitivity of 90.9% in dogs infected with one adult female worm and 100% in dogs infected with more than one female worm. Specificity was 100%. For naturally infected dogs, the Knott test and PetChek® HTWM PF served as reference methods for microfilaremia and antigenemia, respectively...
December 9, 2017: Parasitology Research
Juliana Cardoso de Almeida, Luiz Antonio Costa Gomes, Robert D Owen
We evaluated morphometric variation of the mite Periglischrus torrealbai (Spinturnicidae) on three species of host bats: Phyllostomus discolor, P. hastatus, and Tonatia bidens (Phyllostomidae). A total of 67 females and 74 males of P. torrealbai were collected from 41 host individuals of these three bat species that were sampled in Brazil, Paraguay, and Peru. Twenty-one measurements from the dorsal side and 28 from the ventral side were recorded from female mites and 21 dorsal and 34 ventral measurements were taken from males...
December 8, 2017: Parasitology Research
J Schwelm, M Soldánová, T Vyhlídalová, B Sures, C Selbach
In contrast to the well-studied trematode fauna of lymnaeid snails, only little is known about the role of small planorbid snails as first intermediate hosts for trematodes in temperate freshwater systems. This study aims at closing this gap by assessing the diversity and composition of larval trematode communities in Gyraulus albus and Segmentina nitida in a Central European reservoir system, and by providing an updated comprehensive review of the published trematode records of these snail hosts. A total of 3691 planorbid snails (3270 G...
December 8, 2017: Parasitology Research
Sarmila Tandukar, Jeevan B Sherchand, Jia Xue, Sital Uprety, Samendra P Sherchan, Dinesh Bhandari, Bikash Malla, Rajani Ghaju Shrestha, Laxmi Parajuli, Shristi Poudel, Ashmita Dhital, Eiji Haramoto
This study aimed to determine the prevalence of intestinal parasites and its associated risk factors among school-going children in Kathmandu, Nepal. Between August and September 2016, a total of 333 stool samples were collected from children at five public schools. The collected samples were subjected to formol-ether concentration, followed by conventional microscopic examination for intestinal parasites. The overall prevalence of intestinal parasites was 24.3% (81/333), with Giardia spp. showing the highest prevalence of 18...
December 7, 2017: Parasitology Research
Ayaz Anwar, Ruqaiyyah Siddiqui, Muhammad Asim Hussain, Dania Ahmed, Muhammad Raza Shah, Naveed Ahmed Khan
Infectious diseases are the leading cause of morbidity and mortality, killing more than 15 million people worldwide. This is despite our advances in antimicrobial chemotherapy and supportive care. Nanoparticles offer a promising technology to enhance drug efficacy and formation of effective vehicles for drug delivery. Here, we conjugated amphotericin B, nystatin (macrocyclic polyenes), and fluconazole (azole) with silver nanoparticles. Silver-conjugated drugs were synthesized successfully and characterized by ultraviolet-visible spectrophotometry, Fourier transform infrared spectroscopy, and atomic force microscopy...
December 7, 2017: Parasitology Research
Barbora Pafčo, Julio A Benavides, Ilona Pšenková-Profousová, David Modrý, Barbora Červená, Kathryn A Shutt, Hideo Hasegawa, Terence Fuh, Angelique F Todd, Klára J Petrželková
Affiliation of Klára J. Petrželková was incorrectly assigned as 2, 9, 10 in the original version of this article when in fact it should have been 3, 9, 10. Correct affiliations are presented here.
December 7, 2017: Parasitology Research
G H Zhao, X F Hu, T L Liu, R S Hu, Z Q Yu, W B Yang, Y L Wu, S K Yu, J K Song
There were errors in Fig. 1 of the originally published article. Correct fig. 1 is presented here.
December 4, 2017: Parasitology Research
Kobra Mokhtarian, Ahmad Reza Meamar, Majid Khoshmirsafa, Elham Razmjou, Leila Masoori, Majid Khanmohammadi, Lame Akhlaghi, Reza Falak
Laboratory diagnosis of sheep fasciolosis is commonly performed by coprological examinations; however, this method may lead to false negative results during the acute phase of the infection. Furthermore, the poor sensitivity of coprological methods is considered to be a paradox in the chronic phase of the infection. In this study, we compared the immunoreactivity of native and recombinant forms of Fasciola hepatica excretory/secretory antigens and determined their capabilities for the development of F. hepatica-specific immunoassays...
December 4, 2017: Parasitology Research
Xueyong Zhang, Yingna Jian, Xiuping Li, Liqing Ma, Gabriele Karanis, Cai Qigang, Panagiotis Karanis
The objective of this study was to determine the prevalence of Cryptosporidium species infections in young cattle and sheep in the north-eastern part of the Qinghai-Tibetan Plateau Area (QTPA), north-western China. A total number of 454 faecal samples (389 from cattle and 65 from sheep) were collected and investigated to determine the prevalence of Cryptosporidium spp. oocysts. Cryptosporidium spp. infections detected in cattle (n = 56 positive samples) and sheep (n = 4 positive samples) were as following: C...
December 3, 2017: Parasitology Research
Mariwan M M Al-Bajalan, Sherko S Niranji, Sirwan M A Al-Jaf, Hirotomo Kato
Canine leishmaniasis (CanL) caused by Leishmania infantum (L. infantum) is considered as a zoonotic disease and within the last few decades, studies have identified the parasite as a major causative agent of human visceral leishmaniasis. However, in dogs, few recent studies have determined L. major as a cause of cutaneous manifestations and L. tropica as an etiological agent for cutaneous lesions involving mucosa. Interestingly, current study has found canine cutaneous lesions with mucosal involvement in a dog diagnosed with L...
December 3, 2017: Parasitology Research
Arturo Silvero-Isidre, Sergio Morínigo-Guayuán, Aaron Meza-Ojeda, Marcelo Mongelós-Cardozo, Claudia Centurión-Wenninger, Susy Figueredo-Thiel, Diego F Sanchez, Nidia Acosta
Chagas disease is a potentially fatal disease caused by the parasite Trypanosoma cruzi, which can in some cases affect the central nervous system. The objective was to evaluate the effect of aspirin (ASA) in the behavior of mice infected with T. cruzi during the acute phase. This was an experimental study with random assignation. Twenty four BALB/c mice were divided into four groups of six animals each as follows: only ASA (OA), ASA before infection (BI), ASA after infection (AI) and only infection (OI). The strain used for infection was M/HOM/Bra/53/Y...
December 1, 2017: Parasitology Research
Samira Salim Mello Gallo, David Scott Lindsay, Nicole Brand Ederli, Filipe Pereira Matteoli, Thiago Motta Venancio, Francisco Carlos Rodrigues de Oliveira
This study was conducted to identify the Sarcocystis species that infect the opossum Didelphis aurita in order to determine which sporocysts they are excreating in to the environment and help determine the role of D. aurita in the epidemiology of Sarcocystis. Sporocysts were obtained from intestinal tracts of 8 of 13 D. aurita trapped in Rio de Janeiro state, Brazil, and were orally inoculated into Melopsittacus undulatus and Balb/c nude Mus musculus. Portions of organs and muscles were processed for histology, immunohistochemistry, transmission electron microscopy (TEM), and PCR using primers JNB 33/54, and ITS...
December 1, 2017: Parasitology Research
Chalermchai Somboonpatarakun, Rutchanee Rodpai, Pewpan M Intapan, Oranuch Sanpool, Lakkhana Sadaow, Chaisiri Wongkham, Tonkla Insawang, Thidarut Boonmars, Wanchai Maleewong
The present study explored potentially immunogenic proteins of the encapsulated (Trichinella spiralis) and non-encapsulated (T. pseudospiralis, T. papuae) species within the genus Trichinella. The somatic muscle larval extracts of each species were subjected to immunoblotting analysis using human T. spiralis-infected serum samples. Fifteen reactive bands of all three species were selected for further protein identification by liquid chromatography-tandem mass spectrometry, and their possible functions were ascertained using the gene ontology...
November 30, 2017: Parasitology Research
Amel Farwa, Chao He, Longfei Xia, Hong Zhou
In spite of long-term integrated control programs for Schistosoma japonicum infection in China, the infection is still persistent due to its zoonotic transmission and disease severity which further complicate its control. Th1, Th2, and T-reg cells are involved in S. japonicum immunity; however, their exact roles in immunopathology of this infection are still questionable. Therefore, the monitoring of these T cell subsets' immune responses during a primary infection of S. japonicum at both transcriptional (mRNA) and protein (cytokines) levels would be essential to point out...
November 29, 2017: Parasitology Research
Gaythri Thergarajan, Suresh K Govind, Subha Bhassu
Blastocystis sp. is known to be the most commonly found intestinal protozoan parasite in human fecal surveys and has been incriminated to cause diarrhea and abdominal bloating. Binary fission has been widely accepted as the plausible mode of reproduction for this parasite. The present study demonstrates that subjecting the parasites in vitro to higher temperature shows the proliferation of parasite numbers in cultures. Transmission electron microscopy was used to compare the morphology of Blastocystis sp. subtype 3 isolated from a dengue patient having high fever (in vivo thermal stress) and Blastocystis sp...
November 29, 2017: Parasitology Research
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