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Parasitology International

D M Atopkin, V V Besprozvannykh, D N Ha, V H Nguyen, V T Nguyen, K P Chalenko
Adult specimens representing Pseudohaploporus vietnamensis n. g., sp. n., Pseudohaploporus planilizum n. g., sp. n., and Pseudohaploporus sp. were collected from the intestines of Osteomugil engeli (Bleeker, 1858), Moolgarda seheli (Forsskål, 1775), and Planiliza subviridis (Valenciennes, 1836) from Vietnam. The new genus Pseudohaploporus n. g. is similar to the genus Haploporus Looss, 1902 in morphology and host-specificity. Species of Pseudohaploporus and Haploporus both possess an elongated body, a long oesophagus, an intestinal bifurcation behind the ventral sucker, a large hermaphroditic bursa, vitellarium consisting of two compact accumulations, concretions in the excretory vesicle, and numerous small eggs that contain miracidia with a pigment eye, and both infect mullet...
November 12, 2018: Parasitology International
Madoka Ichikawa-Seki, Ragab M Fereig, Tatsunori Masatani, Aiko Kinami, Yoko Takahashi, Katsuya Kida, Yoshifumi Nishikawa
The infection of neonatal calves with Cryptosporidium parvum can have a huge economic impact because diarrhea caused by the parasite sometimes results in death. A serodiagnostic system will be helpful in the diagnosis of C. parvum infection. CpP23 is commonly used as an antigen for enzyme-linked immunosorbent assay (ELISA); however, some positive sera show low reactivities, as shown in this study. Herein, we focused on three other antigens, CpGP15, CpP2 and CpGP60, in addition to CpP23, to detect C. parvum-specific antibodies in cattle sera...
October 31, 2018: Parasitology International
Luciano P Negreiros, Marcos Tavares-Dias, Carina Elisei, Luiz E R Tavares, Felipe B Pereira
The male of Philometroides acreanensis, parasitic in the anterior intestine external wall of the freshwater catfish Pimelodus blochii, from the Brazilian Amazon, is described for the first time. Additional data on the morphology of females is given. The new morphological data strengthened the validity of the species as well as its first genetic characterization, using three nuclear genetic markers (18S and 28S of the rDNA and ITS1-58S-ITS2), confirmed the high genetic resemblance of male and female specimens...
October 30, 2018: Parasitology International
Hirokazu Sakamoto, Yoshihisa Hirakawa, Ken-Ichiro Ishida, Patrick J Keeling, Kiyoshi Kita, Motomichi Matsuzaki
Perkinsus marinus is a marine protozoan parasite that infects natural and farmed oysters, attracting attention from researchers in both fisheries and evolutionary biology. The functions of almost all cellular components and organelles are, however, poorly understood even though a draft genome sequence of P. marinus is publicly available. One of the major obstacles for a functional study of the parasite is limited experimental means for genetic manipulation: a transfection method was established in 2008, and the first drug selection system with bleomycin was reported in 2016...
October 30, 2018: Parasitology International
Tatsuhiro Tohmoto, Eizo Takashima, Satoru Takeo, Masayuki Morita, Hikaru Nagaoka, Rachanee Udomsangpetch, Jetsumon Sattabongkot, Tomoko Ishino, Motomi Torii, Takafumi Tsuboi
Merozoite surface proteins (MSPs) are considered as promising blood-stage malaria vaccine candidates. MSP3 has long been evaluated for its vaccine candidacy, however, the candidacy of other members of MSP3 family is insufficiently characterized. Here, we investigated Plasmodium falciparum MSP11 (PF3D7_1036000), a member of the MSP3 family, for its potential as a blood-stage vaccine candidate. The full-length protein (MSP11-FL) as well as the N-terminal half-MSP11 (MSP11-N), known to be unique among the MSP3 family members, were expressed by wheat germ cell-free system, and used to raise antibodies in rabbit...
October 29, 2018: Parasitology International
Maki Nishimura, Takashi Goyama, Sohei Tomikawa, Ragab M Fereig, El-Sayed N El-Alfy, Kisaburo Nagamune, Yoshiyasu Kobayashi, Yoshifumi Nishikawa
Toxoplasma gondii is a protozoan parasite that causes fatal disease in New World monkeys. Several reports have described outbreaks of toxoplasmosis in squirrel monkeys. Here, we report the death of four squirrel monkeys in a captive colony from acute toxoplasmosis, one of which developed toxoplasmosis about 1 year after the initial outbreak. Serum anti-T. gondii antibody was detected by a latex agglutination test in the animals, and one presented seropositive before clinical signs were observed. Macroscopically, the lungs were severely affected and three animals showed pulmonary edema...
October 19, 2018: Parasitology International
Sakaewan Ounjaijean, Sukanya Chachiyo, Voravuth Somsak
During Plasmodium malaria parasite infection in a human, the intraerythrocytic stages lead to the clinical manifestations of the disease, especially hypoglycemia. Hypoglycemia is a recognized feature of severe malaria and linked with a high risk of mortality for children. Hence, the present study aimed to investigate the protective effect of T. crispa stem extract on hypoglycemia induced by P. berghei infection tested with a mouse model. ICR mice were inoculated with 1 × 107 parasitized erythrocytes of P...
October 18, 2018: Parasitology International
Daisuke Ito, Eizo Takashima, Tsutomu Yamasaki, Shinya Hatano, Tomoyuki Hasegawa, Kazutoyo Miura, Masayuki Morita, Amporn Thongkukiatkul, Mahamadou Diakite, Carole A Long, Jetsumon Sattabongkot, Rachanee Udomsangpetch, Hideyuki Iriko, Tomoko Ishino, Takafumi Tsuboi
Proteins coating Plasmodium merozoite surface and secreted from its apical organelles are considered as promising vaccine candidates for blood-stage malaria. The rhoptry neck protein 12 of Plasmodium falciparum (PfRON12) was recently reported as a protein specifically expressed in schizonts and localized to the rhoptry neck of merozoites. Here, we assessed its potential as a vaccine candidate. We expressed a recombinant PfRON12 protein by a wheat germ cell-free system to obtain anti-PfRON12 antibody. Immunoblot analysis of schizont lysates detected a single band at approximately 40 kDa under reducing conditions, consistent with the predicted molecular weight...
October 17, 2018: Parasitology International
Romina S Petrigh, María M Cafrune, Martín H Fugassa
Lamanema chavezi (Family Molineidae) is a parasitic nematode of South American camelids (SACs). A few studies have reported this parasite in SACs, mainly in domestic camelid species (llama and alpaca). Parasite identification by means of copro-parasitological methods is non-invasive and allows performing epidemiological studies. However, egg misidentification and difficulty to culture third-stage larvae do not allow identifying nematodes to species level. In contrast, molecular tools allow identifying eggs of gastrointestinal nematodes more accurately...
October 17, 2018: Parasitology International
Grasiele S V Tavares, Débora V C Mendonça, Carolina K Miyazaki, Daniela P Lage, Tauane G Soyer, Lívia M Carvalho, Flaviano M Ottoni, Daniel S Dias, Patrícia A F Ribeiro, Luciana M R Antinarelli, Fernanda Ludolf, Mariana C Duarte, Elaine S Coimbra, Miguel A Chávez-Fumagalli, Bruno M Roatt, Daniel Menezes-Souza, José Mário Barichello, Ricardo J Alves, Eduardo A F Coelho
Clioquinol (5-chloro-7-iodoquinolin-8-ol or ICHQ) was recently showed to presents an in vitro effective antileishmanial action, causing changes in membrane permeability, mitochondrial functionality, and parasite morphology. In the present study, ICHQ was incorporated into a Poloxamer 407-based polymeric micelles system (ICHQ/M), and its antileishmanial activity was in vivo evaluated in L. amazonensis-infected BALB/c mice. Amphotericin B (AmpB) and its liposomal formulation (Ambisome®) were used as controls...
October 16, 2018: Parasitology International
Yuma Ohari, Yasuhiro Kuwahara, Tadashi Itagaki
Green-banded broodsacs of Leucochloridium sporocysts were obtained from land snails, Succinea lauta, collected in Esashi, Esashi District, Hokkaido, Japan. The broodsacs were similar to those of L. paradoxum, which have never been found on the Japanese archipelago. Here, we compare morphological and molecular genetic characteristics of the green-banded broodsacs to those of L. paradoxum. The broodsacs described in this study and those of L. paradoxum showed three equal parts; however, band characteristics of the second parts differed...
October 10, 2018: Parasitology International
Mohammad A Rahman, Thishan C Yahathugoda, Bumpei Tojo, Prasad Premaratne, Fumiaki Nagaoka, Hidekazu Takagi, Selvam Kannathasan, Arumugam Murugananthan, Mirani V Weerasooriya, Makoto Itoh
Lymphatic filariasis (LF) has been declared eliminated in Sri Lanka in September 2016. To maintain elimination status, a surveillance system to detect hidden endemic foci or LF resurgence is of highest priority. In this paper, we have reported an investigation of LF transmission in Trincomalee district where a surveillance program was not carried out due to 30 years of civil unrest. Proposed surveillance system included, measurement of anti-filarial IgG4 in urine of schoolchildren in areas where LF transmission could exist and assessment of circulating filarial antigen (CFA) and microfilaria (mf) in all urine antibody positive schoolchildren, their family members and 10-15 neighbours of each urine antibody positive household...
October 9, 2018: Parasitology International
Lais Pardini, Mariana Bernstein, Liliana A Carral, Federico J Kaufer, Andrea Dellarupe, María L Gos, Lucía M Campero, Gastón Moré, Matías T Messina, María V Schneider, Cristina B Freuler, Ricardo A Durlach, Juan M Unzaga, María C Venturini
Toxoplasmosis, a worldwide distributed zoonosis, can be transmitted congenitally affecting fetuses and developing variable clinical signs. Different Toxoplasma gondii genotypes and infective dose are related factors with different clinical manifestations. Several studies indicate that atypical strains could produce more severe clinical manifestations compared to typical strains. Umbilical cord blood (n = 37) and placenta (n = 19) were collected at birth from women with acute T. gondii infection and processed for isolation by mice bioassay...
October 7, 2018: Parasitology International
Yuki Oda-Yokouchi, Mayumi Tachibana, Hideyuki Iriko, Motomi Torii, Tomoko Ishino, Takafumi Tsuboi
Invasion of host cells by apicomplexan parasites is mediated by proteins released from microneme, rhoptry, and dense granule secretory organelles located at the apical end of parasite invasive forms. Microneme secreted proteins establish interactions with host cell receptors and induce exocytosis of the rhoptry organelle. Rhoptry proteins are involved in target cell invasion as well as the formation of the parasitophorous vacuole in which parasites reside during development within the host cell. In Plasmodium merozoites, the rhoptry neck protein (RON) complex consists of RON2, RON4, and RON5, and interacts with apical membrane antigen 1 (AMA1) as a critical structure of the invasion moving junction...
October 2, 2018: Parasitology International
Shuko Kaito, Mizuki Sasaki, Kentaro Goto, Ryo Matsusue, Hiroshi Koyama, Minoru Nakao, Hideo Hasegawa
A case of small bowel obstruction caused by Bolbosoma sp. infection is reported. A 27-year-old woman admitted with abdominal pain was diagnosed as small bowel obstruction. Laparoscopic surgery revealed induration in jejunum at ca. 120 cm distal to the ligament of Treiz, attributed to a band connecting the serosa to the ascending mesocolon. Resected band contained an acanthocephalan accompanying foreign body reaction with abscess formation. The parasite belonged to the genus Bolbosoma, of which identification was made by DNA sequence analysis...
October 2, 2018: Parasitology International
Praphathip Eamsobhana, Hoi-Sen Yong, Sze-Looi Song, Xiao-Xian Gan, Anchana Prasartvit, Anchalee Tungtrongchitr
Angiostrongylus cantonensis is the main causative agent of human angiostrongyliasis. A sibling species, A. malaysiensis has not been unequivocally incriminated to be involved in human infections. To date, there is only a single report on the application of the partial 66-kDa protein gene sequence for molecular differentiation and phylogeny of Angiostrongylus species. Nucleotide sequences of the 66-kDa protein gene of A. cantonensis and A. malaysiensis from Thailand, as well as those of the laboratory strains of A...
September 26, 2018: Parasitology International
O Y M Soo
Haliotrema susanae sp. nov. is described from the gills of the pinecone soldierfish, Myripristis murdjan off Langkawi Island, Malaysia. This species is differentiated from other Haliotrema species especially those from holocentrids in having a male copulatory organ with bract-like extensions at the initial of the copulatory tube, grooved dorsal anchors and ventral anchors with longer shafts. The maximum likelihood (ML) analysis based on partial 28S rDNA sequences of H. susanae sp. nov. and 47 closely related monogeneans showed that H...
September 20, 2018: Parasitology International
Paul Olalekan Odeniran, Ewan Thomas Macleod, Isaiah Oluwafemi Ademola, Susan Christina Welburn
Bovine trypanosomosis is a problem in the livestock industry in Nigeria. A longitudinal survey of cattle sampled during the wet and dry seasons was conducted from April 2016 to March 2017. Blood samples were collected by random sampling from 745 cattle in southwest Nigeria and screened for trypanosomes by internal transcribed spacer-polymerase chain reaction (ITS-PCR). Cattle positive for Trypanozoon DNA were further screened with the Rode Trypanozoon antigen type (RoTat) 1.2 PCR and Trypanosoma brucei gambiense glycoprotein (TgsGP) genes for T...
September 20, 2018: Parasitology International
Rie Kubota, Katsuki Matsubara, Kenichi Tamukai, Kazunori Ike, Toshihiro Tokiwa
Long-tailed chinchillas Chinchilla lanigera are popular rodent species kept both in households, where they are hand-raised as pets, and in zoological facilities. From January 2016 to February 2017, 13 juvenile chinchillas from five facilities in Japan were diagnosed with cryptosporidiosis at the animal hospital. Eight of the cases were fatal. All of the animals were imported from the Czech Republic by the same vendor. Histopathological and multilocus sequence analyses using 18S ribosomal RNA, actin, 70-kDa heat shock protein, and 60-kDa glycoprotein genes confirmed Cryptosporidium ubiquitum of subtype XIId as the etiological agent...
September 19, 2018: Parasitology International
Boye Liu, Zhuqing Deng, Wei Huang, Lu Dong, Yanyun Zhang
Avian haemosporidian parasites are highly diverse, have a wide range of host specificity, and reveal diverse compatibility with regard to host range and geographical distribution. Therefore, understanding haemosporidian parasite diversity in different host species and different regions is crucial. A survey of the haemosporidian parasite in 186 Godlewski's buntings in Beijing was conducted to compare infection patterns between Godlewski's bunting, local passerines and the global avian host. High prevalence (88...
September 18, 2018: Parasitology International
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