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Journal of Parasitology

Antonella Costa, Stefania Graci, Gaetano Cammilleri, Maria Drussilla Buscemi, Rosaria Collura, Antonio Vella, Vincenzo Ferrantelli
In this research a total of 3,017 fish samples belonging to 11 species from Sicily's Mediterranean coasts were examined for the presence of Hysterothylacium spp. larvae, which were then used in subsequent phylogenetic studies. Fifty-eight Raphidascaridid parasitic nematodes were found in the examined fish, with prevalence values ranging from 0.2% in anchovies to 60% in forkbeard samples. Twenty-seven parasites were identified as Hysterothylacium fabri and Hysterothylacium aduncum by sequencing the following regions: the nuclear ribosomal internal transcribed spacer (ITS) and the mitochondrial cytochrome c oxidase subunit II (cox2)...
May 15, 2018: Journal of Parasitology
Daniele Santana Rocha, Mariana Guimarães Nilsson, Bianca Mendes Maciel, Hilda Fátima de Jesus Pena, Bruna Farias Alves, Aristeu Vieira Silva, Luís Fernando Pita Gondim, George Rego Albuquerque
In the present work, genotyping of 25 isolates of Toxoplasma gondii from free-range chickens in the State of Bahia was performed by means of polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique using eleven genetic markers (SAG1, 5'+3'SAG2, alt.SAG2, SAG3, BTUB, GRA6, c22-8, c29-2, L358, PK1, Apico and CS3). The analysis revealed eight genotypes, three of which had never been previously reported. Four genotypes were represented by single isolates, while the others by two or more isolates...
May 15, 2018: Journal of Parasitology
Xin-Lei Wang, Ling Dong, Li Zhang, Yan Lv, Qian Li, Hailong Li
Rodents play important rule in the transmission of Toxoplasma gondii, however, little is known of the seroprevalence and genetic diversity of T. gondii infection in rodents in Yunnan, southwestern China. In this study, we examined the seroprevalence and genetically characterized T. gondii infection in naturally-infected rodents in Yunnan Province, southwestern China between March and July 2016. A total of 261 serum samples were collected from rodents in Jingha district, Xishuangbanna Dai Autonomous Prefecture, Yunnan province, and examined for T...
May 3, 2018: Journal of Parasitology
Kensuke Taira, Shohei Nakamura, Toshihiro Tokiwa, Yumi Une
Occurrence of clinical signs by infection with Baylisascaris potosis, the roundworm of kinkajous (Potos flavus), in mice, rats and rabbit were studied, and the migration behavior of larvae in mice were compared with that of B. transfuga the round worm of bears (Ursus spp.). Three groups of 8 mice, 3 groups of 6 rats and 3 groups of 2 rabbits were inoculated with either 10, 100 or 1,000 B. potosis eggs. The other 8 mice were inoculated with 1,000 B. transfuga eggs. Animals were monitored for occurrence of clinical signs until 60 days post-inoculation (DPI)...
April 25, 2018: Journal of Parasitology
Nilo Manoel Pereira Vieira Barreto, Joelma Nascimento de Souza, Weslei Almeida Costa Araujo, Nadia Andrade Khouri, Ernesto Pereira de Oliveira, Márcia Cristina Aquino Teixeira, Neci Matos Soares
The objective of this study was to report a case of a hydronephrotic patient with Strongyloides stercoralis infection, with discharge of rhabditoid larva exclusively in urine. In 2013, a 72-yr-old, male patient, hypertensive, obese and diagnosed with hydronephrosis secondary to renal calculi, reported lumbar pain, polyuria, polaciuria and dysuria, as well as frequent urinary tract infections. The microscopic analysis of urine sediment showed the presence of S. stercoralis rabditoid larva. However, parasitological examinations by Baermann-Moraes, agar plate culture and spontaneous sedimentation, performed with 3 fecal samples on alternate days had negative results...
April 19, 2018: Journal of Parasitology
Ali Barati, Gholamreza Razmi
Canine hepatozoonosis, caused by H. canis, is a tick-borne disease in domestic and wild dogs that is transmitted by ingestion of Rhipicephalus sanguineus ticks. The aim of the study was to detect H. canis in stray dogs in Iran using blood smear examination and molecular techniques. From October 2014 to September 2015, 150 EDTA blood samples were collected from stray dogs in the northeast region of Iran. Blood smears were microscopically examined for the presence of Hepatozoon gamonts; whole blood was evaluated by PCR, with subsequent sequencing and phylogenetic analysis...
April 17, 2018: Journal of Parasitology
Kerry E O'Connor, Anne M Kjemtrup, Patricia Ann Conrad, Andrea Swei
Human babesiosis is a tick-borne protozoal disease of increasing clinical significance in North America. Most cases in the eastern and mid-western regions of the United States are reportedly due to Babesia microti infections. By contrast, most human infections reported in California and Washington have been attributed to a new species that was first identified in 1991 and subsequently named Babesia duncani. While the tick vector and mammalian reservoir hosts for B. microti are well characterized, the vector and reservoir hosts for B...
April 16, 2018: Journal of Parasitology
John Sullivan
Several genes have recently been shown to affect the innate resistance of laboratory strains of Biomphalaria glabrata to infection with Schistosoma mansoni, including Hsp90, expression of which following a brief exposure to elevated temperature can interfere with resistance in juvenile BS-90 snails. Because a prior study failed to see a similar effect in adult snails, juvenile BS-90 snails were exposed to 10 or 50 miracidia following a 4.5 to 6-hr incubation at 33 C or 37 C. Snails were then monitored for production of secondary sporocysts or release of cercariae...
April 12, 2018: Journal of Parasitology
WenXiang Li, Hong Zou, Shan G Wu, Fan Xiong, Ming Li, Xing R Ma, David J Marcogliese, Gui T Wang, Locke Sean A
Species composition and diversity of dactylogyrids were compared on gills of wild and cultured goldfish Carassius auratus from 3 naturally populated lakes and 3 stocked aquaculture ponds in Hubei province of China to examine the differences in the gill parasite community between in natural and farmed waters. Of the 7 detected species of Dactylogyrus, all were found in lakes and 5 in ponds, Dactylogyrus inexpectatus and Dactylogyrus anchoratus being absent from ponds. No significant correlation was found between the species richness and habitat area or host size, nor was there a significant difference in mean species richness between lakes (0...
April 12, 2018: Journal of Parasitology
Charles T Faulkner
No abstract text is available yet for this article.
April 10, 2018: Journal of Parasitology
Smarn Tesana, P Khampoosa, S Piratae, S Prasopdee, B Sripanidkulchai
The human liver fluke Opisthorchis viverrini (Platyhelminthes, Trematoda, Digenea) uses snails of the genus Bithynia as first intermediate host. Peculiarly among trematodes, the eggs of O. viverrini hatch within the digestive tract of its snail host. It remains uncertain whether hatching in this species is mediated through mechanical fracture of the eggshell or by digestion with specific digestive enzymes. This study aimed to characterize enzymes with specific inhibitor and factors involved in the hatching activity of O...
April 4, 2018: Journal of Parasitology
Rewaida Abdel-Gaber, Mona Fol, Saleh Al Quraishy
Water mites of the genus Unionicola are the most common symbionts of freshwater bivalves. During the current investigation, a total of 120 live freshwater mussels [Corbicula fluminea (Veneroida), Coelatura aegyptiaca (Unionoidea) Mutela rostrata and Chambardia rubens (Mutelidae)], were collected from 2 localities in Tura (Helwan Governorate) and El Kanater (Qaluobiya Governorate), Egypt. Only 3 of the 4 bivalve species listed are considered freshwater bivalves (members of Unionoidea). While, C. fluminea belong to the family Cyrenidae within Veneroida...
March 28, 2018: Journal of Parasitology
Marcela Lareschi
Laelapinae mites are common ectoparasites of small mammals, mainly sigmodontine rodents, but males are not frequent in natural populations. In this study, the morphology of the unknown males of Androlaelaps misionalis Lareschi, 2010 and Androlaelaps ulysespardinasi Lareschi, 2011 are described. The males of these species differ from the male of Androlaelaps rotundus (Fonseca, 1936), a close species, because of the size and shape of their dorsal shield, and the length of paranal and sternal st1 and st2 setae...
March 21, 2018: Journal of Parasitology
Misael Chinchilla
The endogenous life cycle of Eimeria caliginosa was studied in experimentally-infected dusky rice rats, Melanomys caliginosus. All endogenous stages were located in the epithelial cells of villi in the small intestine. Both Giemsa-stained mucosal scrapings and histological sections were studied for the diagnosis of all the life cycle stages. Eimeria caliginosa has 3 generations of meronts (M) that differ by size, shape, and number of merozoites (m), which also differ in their size, shape, and location of their nuclei within the cytoplasm of the meronts...
March 21, 2018: Journal of Parasitology
Donato Traversa, Leonardo Della Salda, Anastasia Diakou, Chiara Sforzato, Mariarita Romanucci, Antonio Frangipane di Regalbono, Raffaella Iorio, Valentina Colaberardino, Angela Di Cesare
Parasitic nematodes affecting the respiratory system of cats are gaining much attention in the scientific community and new knowledge has recently been acquired on their epizootiology, biology and clinical aspects. In particular, in the past few years, different studies have indicated that the metastrongyloid lungworm Troglostrongylus brevior can be vertically transmitted in cats, although information on its basic biology is still poor. The present paper describes a case of troglostrongylosis in a litter of three suckling kittens, with a focus on anatomo-pathological and biological features of the infection in two of these three animals...
March 20, 2018: Journal of Parasitology
Zachary Villarreal, Nicole Stephenson, Janet Foley
Increasing rates of Rocky Mountain spotted fever (RMSF) in the southwestern United States and northern Mexico underscore the importance of studying the ecology of the brown dog tick, Rhipicephalus sanguineus, the vector in that region. This species is reported to comprise distinct tropical and temperate lineages which may differ in vectorial capacity for RMSF and which are hypothesized to be limited in their geographical range by climatic conditions. In this study, lineage was determined for ticks from nine locations in California, Arizona, and Mexico by DNA sequencing of 12S, 16S, and D-loop ribosomal RNA...
March 19, 2018: Journal of Parasitology
Wayne Rossiter, Harley M Davidson
The white grub (Posthodiplostomum minimum) is a common parasite of centrarchid fishes, frequently reaching high prevalence and intensity values in local populations. However, significant variation in infection has been observed across sunfish species (Lepomis spp.), which are common and abundant hosts for this parasite. Previous observations suggest both extrinsic factors (habitat-specific characteristics and environmental parameters) and intrinsic factors (e.g., host size, behavior, susceptibility, etc.) as important predictors of infection in this parasite-host system...
March 19, 2018: Journal of Parasitology
Stephen S Curran, Eric E Pulis, Michael J Andres, Robin M Oversteet
Two cryptic species of haploporid digeneans belonging in Saccocoelioides are described from Costa Rica; one from a poeciliid fish Poecilia gillii and the other from a characid fish, Astyanx aeneus. Traditional morphological features are examined and found to be largely inefficient for differentiate among new species and 20 New World congeners. Comparison of ribosomal DNA sequences among the 2 new species, 2 North American, 4 Middle American, and 3 South American species of Saccocoelioides, including the type-species Saccocoelioides nanii from Argentina and Saccocoelioides sogandaresi from Texas, is effective for differentiating among these species...
March 16, 2018: Journal of Parasitology
Colleen Edith Archer, M Corrie Schoeman, Christopher Charles Appleton, Samson Mukaratirwa, Karen J Hope, Glenda Beverly Matthews
This study investigated associations between Trypanosoma lewisi; Xenopsylla cheopis, a common cyclical vector of T. lewisi; Polyplax spinulosa, a reported mechanical vector; and Laelaps ecidnina and L. lamborni, two rodent mites of Rattus norvegicus in Durban. Three hundred and seventy nine R. norvegicus were live-trapped at 48 sites in 4 locality types of Durban during a one year period. Rats were euthanized, cardiac blood was taken to check for hemoparasites and ectoparasites were removed for identification...
March 16, 2018: Journal of Parasitology
Michael Tessler, David Marancik, Donald Champagne, Alistair Dove, Alvin Camus, Mark E Siddall, Sebastian Kvist
Leeches (Annelida: Hirudinea) possess powerful salivary anticoagulants and, accordingly, are frequently employed in modern, authoritative medicine. Members of the almost exclusively marine family Piscicolidae account for 20% of leech species diversity, and feed on host groups (e.g., sharks) not encountered by their freshwater and terrestrial counterparts. Moreover, some species of Ozobranchidae feed on endangered marine turtles and have been implicated as potential vectors for the tumor-associated turtle herpesvirus...
March 16, 2018: Journal of Parasitology
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