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Parasitology International

Anastasia Voronova, Galina N Chelomina
Nanophyetiasis is the severe zoonotic disease caused by parasitic worms from the genus Nanophyetus. Humans and carnivorous animals become infected when they ingest raw fish containing metacercariae, especially Pacific salmonids. Nanophyetiasis is detected in limited geographical areas which include the coastal regions of the North Pacific: the United States of America, Russian Federation and Japan. Despite the epidemiological significance, Nanophyetus species have not been well studied genetically. In this research, we for the first time explored genetic diversity of Nanophyetus japonensis from Japan in comparison with those of related species, N...
January 15, 2018: Parasitology International
Caroline Kijogi, Daisuke Kimura, Lam Quoc Bao, Risa Nakamura, Evans Asena Chadeka, Ngetich Benard Cheruiyot, Felix Bahati, Kazuhide Yahata, Osamu Kaneko, Sammy M Njenga, Yoshio Ichinose, Shinjiro Hamano, Katsuyuki Yui
Individuals living in malaria endemic areas become clinically immune after multiple re-infections over time and remain infected without apparent symptoms. However, it is unclear why a long period is required to gain clinical immunity to malaria, and how such immunity is maintained. Although malaria infection is reported to induce inhibition of immune responses, studies on asymptomatic individuals living in endemic regions of malaria are relatively scarce. We conducted a cross-sectional study of immune responses in asymptomatic school children aged 4-16years living in an area where Plasmodium falciparum and Schistosoma mansoni infections are co-endemic in Kenya...
January 15, 2018: Parasitology International
Tadashi Kaimoto, Takuya Hirazawa, Takahito Masubuchi, Aya Morohoshi, Hirotaka Katahira, Mari Kobayashi
The Kuril harbor seal around Hokkaido is presently recovering from a resource crisis while conflicts with local fisheries have become a concern. However, its feeding habits, which are fundamental information for taking proper preventive measures, are still poorly understood. We thus examined the infection status of a trophically-transmitted parasite, Corynosoma strumosum in the seals of Erimo Cape, to assess the host's feeding habits with a practical view of the parasite as a biological indicator. A total of 2802 worms were found from 20 male and 20 female by-caught animals in salmon set nets within local fisheries during August to November 2014...
December 30, 2017: Parasitology International
Petr Heneberg, María Casero, Helga Waap, Jiljí Sitko, Fábia Azevedo, Miroslav Těšínský, Ivan Literák
Trematodes of the genus Philophthalmus Loos, 1899 are the eye parasites of birds and mammals, which use freshwater snails as their first intermediate hosts. Here we examined the presence of philophthalmids in a total of 1515 gulls (589 Larus fuscus and 926 Larus michahellis) admitted between January 2010 and October 2016 for rehabilitation at Olhão (Portugal), by the use of combined morphological and molecular analysis. We recorded the first infected L. fuscus and L. michahellis in July and November 2015, respectively...
December 27, 2017: Parasitology International
Pollyana M S Melo, Sarah El Chamy Maluf, Mauro F Azevedo, Thaysa Paschoalin, Alexandre Budu, Piero Bagnaresi, Flávio Henrique-Silva, Andrea Soares-Costa, Marcos L Gazarini, Adriana K Carmona
Malaria is a disease caused by Plasmodium parasites that affects hundreds of millions of people. Plasmodium proteases are involved in invasion, erythrocyte egress and degradation of host proteins. Falcipains are well-studied cysteine peptidases located in P. falciparum food vacuoles that participate in hemoglobin degradation. Cystatins are natural cysteine protease inhibitors that are implicated in a wide range of regulatory processes. Here, we report that a cystatin from sugarcane, CaneCPI-4, is selectively internalized into P...
December 26, 2017: Parasitology International
Voitto Haukisalmi, Sauli Laaksonen, Antti Oksanen, Kimberlee Beckmen, Ali Halajian, Tetsuya Yanagida, Minoru Nakao
Phylogenetic relationships of tapeworms of the genus Moniezia Blanchard, 1891 (Cestoda, Anoplocephalidae) parasitizing the Eurasian elk Alces alces, the moose A. americanus and the reindeer/caribou Rangifer tarandus (Cervidae) were studied using DNA sequences of two mitochondrial genes (cox1 and nad1). Several isolates from domestic ruminants, representing Moniezia expansa (Rudolphi, 1810) sensu lato and M. benedeni (Moniez, 1879) sensu lato, and one unidentified isolate from an African antelope, were also included in the analysis...
December 26, 2017: Parasitology International
Leonie J Barnett, Terrence L Miller
Species-level relationships of a complex of six putative acanthocolpid cercariae with ventral keels from nassariid gastropods from Capricornia, Queensland (Cercaria capricornia I-VI) were explored using mitochondrial and nuclear DNA sequence data. Analysis of the large subunit of nuclear ribosomal DNA (rDNA), the internal transcribed spacer 2 rDNA and subunit 3 of the nicotinamide-adenine-dinucleotide dehydrogenase mitochondrial gene indicates that the six distinct morphotypes previously identified relate to only three discrete genotypes...
December 26, 2017: Parasitology International
R Q-Y Yong, S C Cutmore, M K Jones, A R G Gauthier, T H Cribb
Seven species of Psettarium (Digenea: Aporocotylidae), including four new species, are reported from tetraodontiform fishes from off coastal east Queensland. Psettarium pandora n. sp. infects the yellow boxfish, Ostracion cubicus (Ostraciidae), the first known aporocotylid to infect this family of fishes. Three new species are reported from pufferfishes of the genus Arothron (Tetraodontidae): Psettarium yoshidai n. sp. infects the map puffer (Arothron mappa), Psettarium hustoni n. sp. infects the black-spotted puffer (A...
December 19, 2017: Parasitology International
Jan Šlapeta, Andrea Lawrence, Michael P Reichel
Fleas are commonly recorded on stray as well as domestic dogs and cats in Hong Kong. Fleas can be a major cause of pruritus in dogs and cats and also vectors of potentially zoonotic bacteria in the genera Rickettsia and Bartonella. Morphological examination of 174 fleas from dogs and cats living in Hong Kong revealed only cat fleas (Ctenocephalides felis). Cytochrome c oxidase subunit 1 gene (cox1) genotyping of 20 randomly selected specimens, revealed three cox1 haplotypes (HK-h1 to HK-h3). The most common haplotype was HK-h1 with 17 specimens (17/20, 85%)...
December 4, 2017: Parasitology International
Hirokazu Sakamoto, Satoru Takeo, Eizo Takashima, Kazutoyo Miura, Bernard N Kanoi, Takamasa Kaneko, Eun-Taek Han, Mayumi Tachibana, Kazuhiro Matsuoka, Jetsumon Sattabongkot, Rachanee Udomsangpetch, Tomoko Ishino, Takafumi Tsuboi
The target molecules of antibodies against falciparum malaria remain largely unknown. Recently we have identified multiple proteins as targets of immunity against Plasmodium falciparum using African serum samples. To investigate whether potential targets of clinical immunity differ with transmission intensity, we assessed immune responses in residents of low malaria transmission region in Thailand. Malaria asymptomatic volunteers (Asy: n=19) and symptomatic patients (Sym: n=21) were enrolled into the study...
December 4, 2017: Parasitology International
Carmen Rojas-Martínez, Roger I Rodríguez-Vivas, Julio V Figueroa Millán, Karla Y Acosta Viana, Edwin J Gutiérrez Ruíz, Carlos R Bautista-Garfias, José J Lira-Amaya, Diego J Polanco-Martínez, Jesús A Álvarez Martínez
No abstract text is available yet for this article.
November 30, 2017: Parasitology International
Adrian P Ybañez, Claro N Mingala, Rochelle Haidee D Ybañez
Tick-borne diseases (TBDs) remain to be a global animal health threat. Developing countries like the Philippines is not exempt to this. Despite the potential impact TBDs can give to these countries, local government initiatives and researches remain to be limited. In the Philippines, most epidemiological studies were confined only to specific areas, and predominantly in the Northern Area. Due to its unique geography and limited studies, the current nationwide status of most TBDs could not be clearly established...
November 29, 2017: Parasitology International
Iva Přikrylová, Šárka Mašová, Milan Gelnar, Moses M Matla, Sareh Tavakol, Wilmien J Luus-Powell
The present study redescribes the monotypic genus Afrodiplozoon Khotenovski, 1981, a diplozooid parasite endemic to Africa, based on material collected during surveys carried out in the Limpopo Province, South Africa, from two cyprinid hosts Labeobarbus marequensis and Enteromius paludinosus. Morphometrical analysis of the composition of internal organs and attachment clamps, using light microscopy and scanning electron microscopy, provided details for the genus and species redescriptions. Posterior attachment apparatus can bear up the 15 pairs of the clamps with the first pair of clamps distinctly smaller and not fully developed...
November 29, 2017: Parasitology International
Z Atayi, H Borji, M Moazeni, M Saboor Darbandi, M Heidarpour
Hepatic injury is the major limitation of long-term albendazole administration in patients with cystic echinococcosis (CE), which could give rise to cessation of treatment. The objective of the present study was to evaluate the protective effects of Zataria multiflora aromatic water (AW) against the hepatic injury induced by long-term albendazole treatment in mice with CE. Fifty healthy BALB/c female mice were infected intraperitoneally by injection of 1500 protoscoleces per animal. Five months after infection, the infected animals were divided into five treatment groups including Z...
November 28, 2017: Parasitology International
Yunfeng Lu, Yongwei Qin, Dandan Zhu, Aidi Shan, Jinrong Feng
Protein phosphorylation, regulated by protein kinases and protein phosphatases, is crucial for protein structure and function in eukaryotic organisms. Type 2C protein phosphatase (PP2C) belongs to the serine/threonine phosphatase family and its activities require the presence of a divalent magnesium or manganese ion. In the present study, a potential PP2C phosphatase (SjPtc1) was identified in Schistosoma japonicum. The SjPTC1 gene was found to be highly expressed in adult worms. A recombinant SjPtc1 protein showed typical PP2C phosphatase activity...
November 25, 2017: Parasitology International
T Channa Yahathugoda, Mirani V Weerasooriya, Wilfred A Samarawickrema, Eisaku Kimura, Makoto Itoh
Alleviating morbidity due to lymphatic filariasis (LF)-especially in elderly patients who are rather ignorant-is presently the biggest challenge for the national filariasis campaign. We introduced two follow-up schemes and compared each other to address three key programmatic issues (1) locating patients, (2) educating patients, family members on practice of lymphoedema self-care (3) well sustained daily self-care. Hundred and seven lymphoedema patients were introduced to the new Community Home Based Care (CHBC) programme as a part of MMDP programme at their homes...
November 22, 2017: Parasitology International
Juliana C Schmidt, Lauro Manhães, Stenio P Fragoso, Daniela P Pavoni, Marco A Krieger
The protozoan Trypanosoma cruzi is a parasite exposed to several environmental stressors inside its invertebrate and vertebrate hosts. Although stress conditions are involved in its differentiation processes, little information is available about the stress response proteins engaged in these activities. This work reports the first known association of the stress-inducible protein 1 (STI1) with the cellular differentiation process in a unicellular eukaryote. Albeit STI1 expression is constitutive in epimastigotes and metacyclic trypomastigotes, higher protein levels were observed in late growth phase epimastigotes subjected to nutritional stress...
November 18, 2017: Parasitology International
Hitoshi Takemae, Kyousuke Kobayashi, Tatsuki Sugi, Yongmei Han, Haiyan Gong, Akiko Ishiwa, Frances C Recuenco, Fumi Murakoshi, Ryo Takano, Yuho Murata, Kisaburo Nagamune, Taisuke Horimoto, Hiroomi Akashi, Kentaro Kato
Toxoplasma gondii rhoptry neck protein 4 (TgRON4) is a component of the moving junction, a key structure for host cell invasion. We previously showed that host cellular β-tubulin is a binding partner of TgRON4 in the invasion process. Here, to identify other binding partners of TgRON4 in the host cell, we examined the binding of TgRON4 to components of the host cell surface. TgRON4 binds to various mammalian cells, but this binding disappeared in glycosaminoglycan- and heparan sulfate-deficient CHO cells and after heparitinase treatment of mammalian cells...
November 18, 2017: Parasitology International
A G Sanford, T T Schulze, L P Potluri, R M Hemsley, J J Larson, A K Judge, S J Zach, X Wang, S A Charman, J L Vennerstrom, P H Davis
We profiled three novel T. gondii inhibitors identified from an antimalarial phenotypic high throughput screen (HTS) campaign: styryl 4-oxo-1,3-benzoxazin-4-one KG3, tetrahydrobenzo[b]pyran KG7, and benzoquinone hydrazone KG8. These compounds inhibit T. gondii in vitro with IC50 values ranging from 0.3 to 2μM, comparable to that of 0.25 to 1.5μM for the control drug pyrimethamine. KG3 had no measurable cytotoxicity against five mammalian cell lines, whereas KG7 and KG8 inhibited the growth of 2 of 5 cell lines with KG8 being the least selective for T...
November 18, 2017: Parasitology International
Carmen Rojas-Martínez, Roger Iván Rodríguez-Vivas, Julio Vicente Figueroa Millán, Carlos Ramón Bautista-Garfias, Roberto Omar Castañeda-Arriola, José Juan Lira-Amaya, Patricia Vargas Urióstegui, Juan José Ojeda Carrasco, Jesús Antonio Álvarez Martínez
An attenuated live vaccine containing Babesia bovis and B. bigemina cultured in vitro with a serum-free medium was assessed for its clinical protection conferred of naïve cattle, under natural tick-challenge in a high endemicity zone to Babesia spp. Three groups of six animals were treated as follows: group I (GI) received a vaccine derived from parasites cultured with a free-serum medium; group II (GII) were immunized with the standard vaccine, with parasites cultured in a medium supplemented with 40% (v/v) bovine serum; and a control group (GIII) inoculated with non-infected bovine erythrocytes...
November 16, 2017: Parasitology International
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