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Acta Parasitologica

Vitor L T Mati, Rosilene S Bicalho, Alan L Melo
The schistosome oviposition and granuloma constitution in the peritoneal cavity of AKR/J mice were evaluated. Groups of mice intraperitoneally infected with cercariae of Schistosoma mansoni were weekly euthanized during the acute (56 to 84 days post-infection (DPI)) and chronic (147 to 175 DPI) phase of infection. Schistosome developmental stages obtained via peritoneal lavage and perfusion of the portal system were inspected, counted and fixed, and peritoneal granulomata were then processed for histology. The morphological characterization and quantitative analysis of peritoneal schistosome eggs and granulomata were for the first time performed, such as the demonstration of the viability of miracidia obtained there from...
March 1, 2017: Acta Parasitologica
Arseny A Makarikov
In present study the systematic and taxonomic position of hymenolepidids parasitizing rodents of the family Gliridae from Europe and Central Asia is discussed. Hymenolepis myoxi is redescribed on the basis of the type material from the fat dormouse Glis glis deposited in the collection of the Museum für Naturkunde, Berlin, Germany. Significant corrections of morphologically distinctive characters attributable to H. myoxi include: (1) recognition of a rudimentary rostellar apparatus; (2) absence of rostellar hooks and spination on the suckers; and (3) tissues of the scolex and neck filled with numerous "firm elements"...
March 1, 2017: Acta Parasitologica
Gabriela Muñoz, Mario George-Nascimento, Rodney A Bray
Two new digenean species are described from the intertidal blenny Scartichthys viridis (Valenciennes) (Blenniidae) collected off the coasts of Chile. The digenean Monorchimacradena viridis n. sp. (Lecithasteridae: Macradenininae) differs from the only known species described in the genus, M. acanthuri Nahhas and Cable 1964, in the presence of Drüsenmagen in the caeca, the location of the seminal vesicle between the testis and ovary (anterior to the testis in M. viridis n. sp.), and the pre-ovarian vitellarium...
March 1, 2017: Acta Parasitologica
Per Skallerup, Peter Nejsum, Susanna Cirera, Kerstin Skovgaard, Christian B Pipper, Merete Fredholm, Claus B Jørgensen, Stig M Thamsborg
A single nucleotide polymorphism on chromosome 4 (SNP TXNIP) has been reported to be associated with roundworm (Ascaris suum) burden in pigs. The objective of the present study was to analyse the immune response to A. suum mounted by pigs with genotype AA (n = 24) and AB (n = 23) at the TXNIP locus. The pigs were repeatedly infected with A. suum from eight weeks of age until necropsy eight weeks later. An uninfected control group (AA; n = 5 and AB; n = 5) was also included. At post mortem, we collected mesenteric lymph nodes and measured the expression of 28 selected immune-related genes...
March 1, 2017: Acta Parasitologica
Sergey V Mironov, Barry M Oconnor
A new feather mite species, Neodectes pilgrimi sp. n. (Proctophyllodidae: Pterodectinae), is described from three species of New Zealand wrens (Passeriformes: Acanthisittidae): Xenicus gilviventris Pelzeln, 1867 (type host), X. longipes (Gmelin, 1789) (extinct species), and Acanthisitta chloris (Sparrman, 1787). Based on known host associations of the genus Neodectes, it is hypothesized that Neodectes pilgrimi sp. n. has a secondary origin on New Zealand wrens and was probably transferred onto the ancestor of its hosts from honeyeaters (Passeriformes: Meliphagidae)...
March 1, 2017: Acta Parasitologica
Sonali Khanduja, Ujjala Ghoshal, Uday C Ghoshal
Enterocytozoon bieneusi (E. bieneusi), infecting renal transplant (RT) recipients may be transmitted anthroponotically or zoonotically. Accordingly, we aimed to, a) evaluate genotypes of E. bieneusi ínfecting RT recipients, and b) infer phylogenetic interpretation on transmission of different genotypes among infected hosts. Stool samples of 22 RT recipients infected with microsporidia (identified using modified trichrome staining) were subjected to species identification. All E. bieneusi positive samples were subjected to genotyping...
March 1, 2017: Acta Parasitologica
Jiao Li, Zhi-Wan Zheng, Gayathri Natarajan, Qi-Wei Chen, Da-Li Chen, Jian-Ping Chen
Chinese Leishmania isolate MHOM/CN/90/SC10H2 (L. H2), which was obtained from the spinal cords of patients from the Sichuan province of China, is an uncharacterized, pathogenic species closely related to Leishmania tarentolae. The in vitro transformation rate of L. H2 promastigotes into amastigotes has not been studied. This study is the first to successfully define the in vitro life cycle of L. H2 by investigating the percent conversion of L.H2 promastigotes to amastigotes in vitro under 216 different culture conditions...
March 1, 2017: Acta Parasitologica
Priyanka Priyadarshi, Piyush Dravid, Inayat Hussain Sheikh, Sunita Saxena, Ashish Tandon, Deep C Kaushal, Shakir Ali, Nuzhat A Kaushal
Filarial parasites are complex mixtures of antigenic proteins and characterization of these antigenic molecules is essential to identify the diagnostically important filaria-specific antigens. In the present study, we have fractionated the somatic extracts from adults of Setaria cervi (bovine filarial parasite) on preparative SDS-polyacrylamide gel electrophoresis and tested the immunoreactivity of the separated gel fractions with polyclonal antibodies against filarial excretory-secretory antigens as well as filarial patients sera...
March 1, 2017: Acta Parasitologica
Tiago Milanin, Stephen D Atkinson, Márcia R M Silva, Roberto G Alves, Antônio A M Maia, Edson A Adriano
The involvement of oligochaetes in the life cycles of fresh water myxozoan parasites in Brazil was investigated. Of 333 oligochaetes collected in a fish farm in the State of São Paulo, three (0.9%) released Aurantiactinomyxon type spores. From 86 worms collected in a fish farm in Mato Grosso do Sul State, 1 (0.9%) released actinospores with a novel morphology for which we propose the name Seisactinomyxon. Infected oligochaetes were identified by morphology: all belonged to family Naididae, with Pristina americana the host for Aurantiactinomyxon and Slavina evelinae the host of Seisactinomyxon...
March 1, 2017: Acta Parasitologica
Esin Guven, Hamza Avcioglu, Ahmet Deniz, İbrahim Balkaya, Ugur Abay, Şevki Yavuz, Muzaffer Akyüz
Equine piroplasmosis (EP) is a hemoprotozoan tick-borne disease with worldwide distribution that is caused by Theileria equi and Babesia caballi. There are studies reporting the presence of equine piroplasmosis in Turkey but the situation in Erzurum is unknown. The aim of the current study was to determine the situation of equine piroplasmosis in jeered horses in Erzurum. Between April and August 2015, a total of 125 Arabian horse were examined and blood samples were collected. At the time of sampling, animals were also examined for tick infestations and clinical signs...
March 1, 2017: Acta Parasitologica
Kun Li, Yanfang Lan, Houqiang Luo, Muhammad Shahzad, Hui Zhang, Lei Wang, Lihong Zhang, Dongyu Liu, Xinyu Liu, Yanan Hao, Suolang Sizhu, Jiakui Li
Parasitic nematodes of Oesophagostomum spp., commonly known as 'nodular worms' are one of the most widely distributed and prevalent emerging zoonotic nematodes. However, little is known about the prevalence and gene characteristics of those parasites in Tibetan pigs. Therefore, a study was carried out to investigate the prevalence, isolation and identification of Oesophagostomum spp from Tibetan pigs by genetic markers of nad1,cox3 and ITS1 for the first time. The results revealed that the infection rate of O...
March 1, 2017: Acta Parasitologica
Safoora Salmani, Mohammad Haseli
The microthrix pattern of common forms of the trypanorhynch cestode Prochristianella clarkeae Beveridge, 1990 on which the microscopically visible microtriches almost extended to the posterior end of the scolex was described using SEM and compared to other forms for which this pattern was different. The proximal bothrial surface and the scolex peduncle of all the examined specimens were covered with palmate spinitriches and papilliform filitriches. Unlike the common specimens of P. clarkeae, on the surface of those specimens with unusual distributions of microtriches as well as those on which the microscopically visible microtriches were not observable, palmate spinitriches extended to the mid-pars vaginalis and not to the posterior end of the scolex...
March 1, 2017: Acta Parasitologica
M A Haseeb, Raag Agrawal, Bernard Fried
Recombinant human TNFα (rhTNFα) has previously been shown to reduce fecundity in Schistosoma mansoni adult females maintained in vitro without males, and adversely affect the uptake of [14C]-tyrosine, an amino acid required for schistosome vitellogenesis. Here we report on the effect of rhTNFα on [14C]-methionine uptake in both separated and paired females, and the effect of three different preparations of rTNFα on schistosome oviposition in vitro. In the absence of rhTNFa, separated females incorporated only 30% of the [14C]-methionine incorporated by paired females in a dose and time-dependent manner, suggesting low metabolic activity of females in the absence of males...
March 1, 2017: Acta Parasitologica
Andrzej Zawal, Lieven Therry, Robby Stoks, Grzegorz Michoński
The relationships between water mite larvae parasitizing Coenagrion scitulum in core and edge populations were described. A total of 636 larvae of 7 water mite species were found on 143 C. scitulum adults (82 females and 61 males). C. scitulum was recorded for the first time as a host species for Arrenurus cuspidator, A. bruzelii, A. bicuspidator, A. tricuspidator, A. claviger and Hydryphantes octoporus. The degree of infestation by particular parasite species was typical for these species. In contrast, the parasites' preferences for host body parts were not typical, as they preferred abdominal segments 2-4, which in earlier studies had been avoided by water mite larvae...
March 1, 2017: Acta Parasitologica
Luan C Henker, Claiton I Schwertz, Neuber J Lucca, Manoela M Piva, Patricia Giacomin, Anderson Gris, Leandro A Rhoden, Luke J Norbury, Aleksandro S da Silva, Rafael A da Rosa, Ricardo E Mendes
An outbreak of severe parasitic pneumonia caused by Dictyocaulus viviparus was diagnosed in adult dairy cows in the municipality of Arabutã, Southern Brazil. The total morbidity in the herd was 71.9%, and the morbidity amongst adult lactating cattle was 100%. The main clinical signs observed were dyspnea, tachypnea, nasal discharge, decreased milk production, and cough. A necropsy was conducted on one animal in order to establish the diagnosis. The herd had been treated previously with levamisole; however, clinical signs persisted and became worse...
March 1, 2017: Acta Parasitologica
Yuu Matsuura, Makoto Matsubayashi, Satoko Nukata, Tomoyuki Shibahara, Osamu Ayukawa, Yasuko Kondo, Tomohide Matsuo, Shigehiko Uni, Masaru Furuya, Hiroyuki Tani, Naotoshi Tsuji, Kazumi Sasai
In the production and management of beef and dairy cattle, controlling diarrhea is one of the important concerns. Pathogenic agents of the disease, protozoan parasites including Cryptosporidium spp., are difficult to control, making prevention, diagnoses, and treatment of diarrhea. In the present study, we investigated a farm with a history of calf deaths over a period of 10 years in order to determine the cause of disease and to clarify the detailed distribution of the pathogens. In four examined calves that were reared in calf pens, all were positive with Cryptosporidium and/or Giardia, while the other breeding stock and adult cattle were negative...
March 1, 2017: Acta Parasitologica
Vega Zamora, Carlos García-Ballesteros, Carmen Benet-Campos, Ferrán Ballester, Carmen Cuéllar, Juan C Andreu-Ballester
Anisakiosis is nowadays one of the nematodoses more prevalent in Spain, with rates that oscillate between 0.43% in Galicia (N.W. Spain), and 15.7% and 22.1% in inland and southern regions, respectively. Likewise, it has been proved that Anisakis larvae have developed mechanisms to modulate the dichotomy of the host immune response for their own benefit. The experimental hypothesis of the present study was that Anisakis sp. larval products can be mediators of immune suppression and induce changes on the populations of αβ+ and γδ+ T cells...
March 1, 2017: Acta Parasitologica
Mohamed H Roshdy, Nour M Abd El-Kader, Marwa Ali-Tammam, Isabel Fuentes, Magdy M Mohamed, Nabila A El-Sheikh, Jose Miguel Rubio
Amoebiasis is a human disease produced by Entamoeba histolytica which causes widespread mortality and morbidity worldwide through diarrheal disease and abscess establishment in parenchymal tissues such as liver, lung, and brain. The true prevalence of infection is unknown for most areas of the world due to the difficulty to characterise Entamoeba histolytica versus other non-pathogenic amoebas with identical morphology, as Entamoeba dispar, and Entamoeba moshkovskii. To overcome microscopy misidentification issues, we tested a nested multiplex polymerase chain reaction (PCR) and a real-time PCR on 194 stool samples collected from incoming dysentery patients in Cairo hospitals diagnosed with E...
March 1, 2017: Acta Parasitologica
Natalia Szudarek, Gerard Kanarek, Jacek Dabert
The astigmatid family Hypoderatidae includes over 80 mite species exhibiting peculiar life cycle. Deutonymphs are parasitic instars inhabiting subcutaneous or visceral tissues of birds and rodents, while all other instars are nidicolous forms. In this study we investigated genetic diversity of deutonymphs of two hypoderatid species, Neottialges evansi and Phalacrodectes gaudi, collected from 16 individuals of the great cormorant Phalacrocorax carbo in SW Poland during host post-breeding dispersal. The initial alternative hypotheses were: (1) populations of deutonymphs in both mite species found in tissues of particular bird individuals form genetically distinct populations, (2) mites are panmictic among hosts...
March 1, 2017: Acta Parasitologica
Andre V Bochkov, Barry M Oconnor
A new species of parasitic mites, Myocoptes (Comyocoptes) nesokia sp. nov. (Acariformes: Myocoptidae) is described from Nesokia indica (Gray, 1830) (Rodentia: Muridae) from Pakistan. Females of this species differ from the morphologically similar species, Myocoptes (Comyocoptes) striatus Fain, 1970, by the presence of a verrucose pattern in the middle part of the hysteronotum, longer setae cp (120-140 μm vs. 55-60 μm), and by the absence of scales on the opisthosomal cuticle posterior to the level of setal bases ps3...
March 1, 2017: Acta Parasitologica
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