Shingen Nakamura, Keijiro Hara, Tomoko Kobayashi, Ryohei Sumitani, Masahiro Oura, Yusaku Maeda, Kimiko Sogabe, Hikaru Yagi, Mamiko Takahashi, Shiro Fujii, Takeshi Harada, Yoshimi Bando, Masahiro Abe, Hirokazu Miki
Various opportunistic infections develop during immunodeficiency due to human immunodeficiency virus (HIV) infection. The treatment options for malignant lymphoma (ML) and toxoplasmic encephalitis (TE) are completely different; therefore, their discrimination is critical. A 25-year-old female of foreign nationality had been experiencing headaches for several weeks and suddenly developed convulsions. Brain computed tomography revealed multiple intracranial lesions; therefore, the patient was referred to the neurosurgery department...
April 11, 2024: Parasitology International
Allan Pitta Seabra, João Paulo Sales Oliveira-Correia, Cleber Galvão
Rhodnius species are potential vectors of the etiological agent of Chagas disease (CD), the protozoan Trypanosoma cruzi. CD impacts around seven million people in Latin America, resulting in approximately fourteen thousand deaths per year. Several species of Rhodnius are notable not only for their epidemiological relevance, but also for the challenging distinction between their species. Rhodnius has twenty species, each with its specific epidemiological importance. Rhodnius neglectus and Rhodnius prolixus are found with colonies in domiciliary environments...
April 9, 2024: Parasitology International
Xiao Jin, Houda Cheng, Ming Li, Hong Zou, Jia Cai, Kwaku Amoah, Wenxiang Li, Guitang Wang
Three new species of Gyrodactylus are described from three species of bitterling in Donghu Lake, China: Gyrodactylus ocellorhodei n. sp. from Rhodeus ocellatus; G. sinenorhodei n. sp. from Rhodeus sinensis; and G. acheilorhodei n. sp. from Acheilognathus macropterus. All the three new species showed similar opisthaptor morphology, especially the marginal hooks: all had a slender and perpendicular sickle shaft, and flat sickle base with distinct heel and inner arch which was different from the G. rhodei-group species parasitic on bitterling...
April 6, 2024: Parasitology International
Mayumi Tachibana, Minami Baba, Hideyuki Iriko, Naoaki Shinzawa, Motomi Torii, Tomoko Ishino
Reducing Plasmodium parasite transmission via the mosquito vector is a promising strategy for malaria control and elimination in endemic regions. In the mosquito midgut after the ingestion of an infected blood meal, malaria parasite gametes egress from erythrocytes and fertilize to develop into motile ookinetes that traverse midgut epithelial cells and transform into oocysts adjacent the basal lamina. Plasmodium ookinetes and young oocysts possess a unique organelle called the crystalloid; which has a honeycomb-like matrix structure and is indicated to be involved in sporozoite formation and maturation...
March 31, 2024: Parasitology International
Tamasa Araki, Akihide Koyama, Hiro Yoshimura, Ayako Arai, Satoru Kawai, Shuto Sekizawa, Yuko Umeki, Yumiko Saito-Nakano, Takashi Imai, Munehiro Okamoto, Megumi Sato, Wipaporn Thabthimthong, Taratorn Kemthong, Hajime Hisaeda, Suchinda Malaivijitnond, Takeshi Annoura
Malaria remains a significant global public health concern, with a recent increase in the number of zoonotic malaria cases in Southeast Asian countries. However, limited reports on the vector for zoonotic malaria exist owing to difficulties in detecting parasite DNA in Anopheles mosquito vectors. Herein, we demonstrate for the first time that several Anopheles mosquitoes contain simian malaria parasite DNA using droplet digital PCR (ddPCR), a highly sensitive PCR method. An entomological survey was conducted to identify simian malaria vector species at Phra Phothisat Temple (PPT), central Thailand, recognized for a high prevalence of simian malaria in wild cynomolgus macaques...
March 25, 2024: Parasitology International
Thomas H Cribb, Scott C Cutmore, Nicholas Q-X Wee, Joanna G Browne, Pablo Diaz Morales, Kylie A Pitt
We examined gelatinous zooplankton from off eastern Australia for lepocreadiid trematode metacercariae. From 221 specimens of 17 species of cnidarian medusae and 218 specimens of four species of ctenophores, infections were found in seven cnidarian and two ctenophore species. Metacercariae were distinguished using cox1 mtDNA, ITS2 rDNA and morphology. We identified three species of Prodistomum Linton, 1910 [P. keyam Bray & Cribb, 1996, P. orientale (Layman, 1930), and Prodistomum Type 3], two species of Opechona Looss, 1907 [O...
March 22, 2024: Parasitology International
Juan Rojas-Moncada, Téofilo Torrel-Pajares, Luis Vargas-Rocha
There are various diagnostic techniques available for chronic fasciolosis in ruminants. However, many of them exhibit low specificity and sensitivity, making them impractical for field use and in low-resource laboratories. The present study evaluates the usefulness of the Natural Sedimentation technique in diagnosing chronic fasciolosis in three domestic species conducted at the Laboratorio de Parasitología y Enfermedades Parasitarias, Facultad de Ciencias Veterinas, Universidad Nacional de Cajamarca. Fecal samples were collected from n = 323 cattle, n = 362 sheep, and n = 231 swine for Fasciola hepatica fecal egg counts...
March 22, 2024: Parasitology International
Muzaffer Mızrak, Fakhriddin Sarzhanov, Filiz Demirel, Bedia Dinç, Levent Filik, Funda Dogruman-Al
Blastocystis sp. and Dientamoeba fragilis are intestinal protists, which are common worldwide, but the pathogenic role of these organisms in gastrointestinal diseases is still controversial. This study aimed to investigate the frequency of Blastocystis sp. and D. fragilis in stool samples from adult patients with celiac disease (CD) by using conventional and molecular methods. A total of 75 patients with CD and 75 healthy individuals were included in this study. Fresh stool specimens collected from each individual were analyzed by conventional and molecular methods...
March 16, 2024: Parasitology International
Juan M Osuna-Cabanillas, Emigdio Marín-Enríquez, Ana P Martínez-Falcón, Juan T Timi, Francisco N Morales-Serna
Host phylogeny and ecological convergence are two factors thought to influence the structure of parasite communities. The aims of this study were to determine the diversity of metazoan parasites of 10 sympatric fish species of the family Carangidae from the southeastern Gulf of California, and to analyze their similarity at infracommunity and component community levels, in order to determine if the host species, particularly those congeneric with similar ecological characteristics, exhibit similar assemblages of parasites...
March 8, 2024: Parasitology International
Ibrahim Danladi Muhammad, Usman Aliyu Umar, Umar Sabo Suleiman, Ibrahim Rabiu, Abdullahi Muhammad Ahmad, Mustapha Ahmed Yusuf
OBJECTIVE: A case description of a rare occurrence of female genital schistosomiasis affecting the upper genital tract that presented with features mimicking an ovarian neoplasm. CASE REPORT: Female genital schistosomiasis is a neglected clinical manifestation of the water-born parasitic disease which occurs due to the presence of schistosome eggs in the genitalia of women. A 23-year-old nulliparous woman presented with progressive abdominal distension. An abdominopelvic CT scan revealed a multilobulated right adnexal mass with gross ascites...
March 5, 2024: Parasitology International
Ricardo Bassini-Silva, Maria Eduarda Moraes das Chagas, Victor de Souza Mello-Oliveira, Ana Cláudia Calchi, Ana Carolina Castro-Santiago, Lívia de Oliveira Andrade, Gabriela Coelho Benedet, Fernanda Mara Aragão Macedo Pereira, Lauro Leite Soares-Neto, Alícia Giolo Hippólito, Estevam Guilherme Lux Hoppe, Karin Werther, Marcos Rogério André, Rosiléia Marinho de Quadros, Darci Moraes Barros-Battesti, Sebastián Muñoz-Leal, Fernando de Castro Jacinavicius
The chewing louse genus Eutrichophilus Mjöberg has 19 species only associated with porcupines (Rodentia: Erethizontidae). Of these species, E. cercolabes, E. cordiceps, E. emersoni, E. minor, E. moojeni, and E. paraguayensis have been recorded in Brazil. In the present study, we report E. cordiceps for the first time in the São Paulo State (Bauru Municipality) and for the second time in the Santa Catarina State (Lages Municipality), providing scanning electron images and light microscopy for the eggs, as well as the first molecular data (18S rRNA) for the genus...
March 2, 2024: Parasitology International
Aleena Iype, Karapparambu Gopalan Ajith Kumar, Anisha Joy, Peekkunnel Francis Sebasteena, Anju Varghese, Chundayil Kalarikkal Deepa, George Chandy, Reghu Ravindran
Amblyomma integrum is a large gooseberry sized longirostrate tick (when fully repleted) found in India and Sri Lanka. In Kerala (India), this tick is commonly found in the forest and its fringe areas frequently infesting deer and hence it is locally known as "maan chellu / maanunny" (deer tick). In the present study, molecular characterisation and phylogenetic analysis of A. integrum collected from the area grazed by the sambar deer (Rusa unicolor) of Kerala, south India was performed using three molecular markers viz...
March 2, 2024: Parasitology International
Favour Moses Idih, Victor Nwadiogbu Ogugua, Francis Onakpa Atanu, Chidiebere Kingsley Ndu, Racheal Enechojo Michael, Blessing Kadiri, Lukman Ojo Jimoh, Bilkis Ojochide Usman
Malaria remains a major public health issue worldwide, with high rates of morbidity and mortality. The resistance of Plasmodium parasites to commonly used antimalarial drugs has necessitated the development of novel drugs and targets for malaria treatment. Lycopene is a natural compound present in tomatoes and other red fruits and vegetables. This study aimed to evaluate the antimalarial activity of lycopene and its co-administration with chloroquine against chloroquine-resistant malaria, as well as to assess its impact on hematological abnormalities associated with malaria infection...
February 28, 2024: Parasitology International
Stefano Veraldi, Giovanni Genovese, Umberto Cerino, Gianluca Nazzaro
Follicular larva migrans (FLM) is a rare and atypical clinical presentation of hookworm-related cutaneous larva migrans (HrCLM). FLM is characterized clinically by follicular, round, small, erythematous papules that are sometimes topped by vesicles or pustules. These lesions are usually located on the abdomen, back, buttocks and thighs and are accompanied by more or less severe pruritus. Some typical and/or short and fragmented tracks may also be visible. FLM is more resistant to anti-helminthic drugs than classical HrCLM: this is likely due to the deep location of larvae in hair follicles...
February 28, 2024: Parasitology International
Karla Magalhães Campião, Julia Anselmo da Luz Rico, Gabriel de Souza Monteiro, Lauren V Ash, Cauê Pinheiro Teixeira, Nicholas J Gotelli
American Bullfrogs, Aquarana catesbeiana, are invasive anuran species distributed worldwide. One of the adverse impacts that this species causes in native communities is as a reservoir host for pathogens and parasites. Here, we report the coinfection of two pathogenic organisms in L. catesbeianus: Ranavirus and the nematode Eustrongylides. Bullfrogs were collected in the wild in an pond close to the urban of São Paulo, Brazil. The prevalence of both pathogens was high: 77% were infected with ranavirus with a mean viral load of 971 b, and 100% of the bullfrogs were infected by Eustrongylides sp...
February 26, 2024: Parasitology International
Masayuki Nakanishi, Masaki Takeguchi, Reo Takezaki, Mami Hino, Hiroshi Nomoto
Trypanosoma brucei brucei is a parasitic protist that expresses cell surface proteins modified with complex-type N-linked glycan (NLG), like multicellular organisms. However, little is known about the role of complex-type NLG. In T. b. brucei, it has been shown that either one of the glycosyltransferases, TbGT11 or TbGT15, is sufficient to initiate the synthesis of complex-type NLG. To clarify the role of complex-type NLG, it is necessary to generate cells lacking both enzymes. Therefore, we deleted TbGT11 and TbGT15 from the genome of T...
February 26, 2024: Parasitology International
Ken Inoue, Yasuhiro Takashima, Shinji Hirano, Kumiko Kimura
We report a confirmed case of Toxoplasma gondii infection in the lungs of a cow exhibiting respiratory symptoms. At slaughter, white nodules were discovered in lung tissue, accompanied by enlarged hilar lymph nodes. Histological examination revealed the disappearance of alveolar structures in nodular areas, replaced by granulomas containing inflammatory cells. Immunohistochemical staining with anti-T. gondii antibody and nucleotide sequencing of 18S rDNA confirmed T. gondii infection. However, the link between T...
February 23, 2024: Parasitology International
Junxia Duan, Huikai Qin, Mengqing Sun, Yin Fu, Jiashu Lang, Aihui Zhang, Ziyang Qin, Zhenxuan Guo, Huiyan Xu, Xiaoying Li, Chunren Wang, Longxian Zhang
Blastocystis sp., Enterocytozoon bieneusi, and Giardia duodenalis are three common zoonotic intestinal parasites, and cattle are important hosts of these three intestinal protozoa. In this study, 1632 fecal samples were collected from dairy farms in Heilongjiang Province, China, and screened for Blastocystis sp., E. bieneusi, and G. duodenalis using polymerase chain reaction. Of these, 149 (9.13%) were positive for three zoonotic pathogens, including 104 (6.40%), 22 (1.35%), and 23 (1.41%) for Blastocystis sp...
February 23, 2024: Parasitology International
L H Olmos, R D Moreno, M Lloberas, D H Aguirre, V H Suarez
The objective of this work was to describe the dynamics of development and survival of the free-living stages of cattle gastrointestinal nematodes (GIN) in fecal matter (FM) and pasture during the dry season in the Lerma Valley, Salta province, northwestern Argentina (NWA) to contribute to GIN management. The climate in the region is characterized by a rainy summer followed by a dry season from middle autumn to early spring. Fecal matter from calves naturally infected with GIN was deposited on three experimental field plots in April, July and October 2019, corresponding to the beginning, middle and end of the dry season, respectively...
February 21, 2024: Parasitology International
Tuấn Cường Võ, Hương Giang Lê, Jung-Mi Kang, Đặng Thùy Dương Nguyễn, Thu Hằng Nguyễn, Won Gi Yoo, Youn-Kyoung Goo, Nguyen Thi Minh Trinh, Chau Van Khanh, Huynh Hong Quang, Byoung-Kuk Na
Glucose-6-phosphate dehydrogenase (G6PD; EC deficiency is one of the most common X-linked hereditary disorders worldwide. G6PD deficiency provides resistance against severe malaria, but paradoxically, G6PD deficiency is also a stumbling block in fighting against malaria. Primaquine (PQ), a drug for the radical cure of Plasmodium vivax, can cause lethal acute hemolytic anemia in malaria patients with inherited G6PD deficiency. In this study, we analyzed the phenotypic and genotypic G6PD deficiency status in 1721 individuals (963 males and 758 females) residing in three malaria-endemic areas within the Gia Lai province, Vietnam...
February 21, 2024: Parasitology International
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