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Journal of Parasitology

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https://www.readbyqxmd.com/read/27902893/nematode-parasites-of-teiid-lizards-from-the-brazilian-amazon-rainforest
#1
Lilian Cristina Macedo, Scott L Gardner, Francisco Tiago Vasconcelos Melo, Teresa Cristina Sauer Avila-Pires, Elane Guerreiro Giese, Jeannie Nascimento Dos Santos
This study presents the helminth composition and parameters of infection by several species of nematodes in teiid lizards, Ameiva a. ameiva (Linnaeus, 1758), Cnemidophorus cryptus Cole & Dessauer, 1993, and Kentropyx calcarata Spix, 1825 from the Brazilian Amazonian Rainforest. The lizard populations we studied were parasitized by six species of Nemata, including: Spinicauda spinicauda (Olfers, 1919), Parapharyngodon alvarengai Freitas, 1957, Physaloptera sp. (adults), Physaloptera sp. (larvae), Piratuba digiticauda Lent and Freitas, 1941, and Anisakidae (larvae)...
November 30, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27874323/flotation-of-toxocara-canis-eggs-in-commercial-bleach-and-effects-of-bleach-treatment-times-on-larval-development-in-these-eggs
#2
Alexa C Rosypal, Alice Houk-Miles, Anne M Zajac, David S Lindsay
Toxocara canis is a common intestinal nematode of young dogs. Puppies contaminate the environment with large numbers of eggs that can embryonate and become infective in less than a month. Embryonated eggs are infectious for humans and other paratenic hosts. Most T. canis infections in humans are asymptomatic, however, migration of T. canis larvae in the eye and in the central nervous system can result in vision loss, blindness, and even death. The eggs of T. canis are highly resistant to harsh environmental conditions and routinely used chemical disinfectants...
November 22, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27835071/detection-of-borrelia-genomospecies-2-in-ixodes-spinipalpis-ticks-collected-from-a-rabbit-in-canada
#3
John Donald Scott, Kerry L Clark, Janet E Foley, John F Anderson, Lance A Durden, Jodi M Manord, Morgan L Smith
Lyme disease is a serious health problem with many patients requiring in-depth clinical assessment and extended treatment. In the present study, we provide the first records of the western blacklegged tick, Ixodes pacificus, and Ixodes spinipalpis parasitizing eastern cottontails, Sylvilagus floridanus. We also documented a triple co-infestation of 3 tick species (Ixodes angustus, I. pacificus, I. spinipalpis) feeding on an eastern cottontail. Notably, we discovered a unique member of the Lyme disease bacterium, Borrelia burgdorferi sensu lato (s...
November 11, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27828766/prevalence-abundance-and-intensity-of-implanted-spermatophores-in-the-leech-haementeria-officinalis-glossiphoniidae-hirudinida-from-guanajuato-mexico
#4
Ricardo Salas-Montiel, Anna Phillips, Samantha Contreras-Mirà  N, Alejandro Francisco Oceguera-Figueroa
Fertilization through hypodermic implantation of spermatophores has been recorded in at least 4 groups of leeches: Glossiphoniidae, Piscicolidae, Ozobranchidae and Erpobdelliformes. In Piscicola respirans (Piscicolidae), vector tissue responsible for sperm transfer from a specialized region of the body to the ovaries has led to the non-random attachment of spermatophores on the body surface of the recipient leech. It has been suggested that in glossiphoniid leeches, spermatophores are implanted in any part of the body surface of the recipient leech without a clear pattern or preference for region...
November 9, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27828760/ginseng-stem-and-leaf-saponins-gsls-enhanced-protective-immune-responses-induced-by-toxoplasma-gondii-heat-shocked-protein-70-hsp70-against-toxoplasmosis-in-mice
#5
Xunhui Zhuo, Hongchao Sun, Suhua Wang, Xiaolu Guo, Haojie Ding, Yi Yang, Ying Shan, Aifang Du
Toxoplasma gondii is an obligate intracellular protozoan parasite and is able to infect birds and mammals including humans. In order to find effective antigen-adjuvant combinations that can boost the immunogenicity and protection of antigen vaccines against toxoplasmosis, we examined the protective efficacy in mice immunized with recombinant protein HSP70 when co-administered with ginseng stem-and-leaf saponins (GSLS) isolated from Panax ginseng. All immunized mice produced significantly high levels of specific antibodies against rTgHSP70 and splenocytes from mice presented strong proliferative immune responses...
November 9, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27809699/determining-intermediate-hosts-for-opecoelidae-and-microphallidae-species-platyhelminthes-trematoda-in-the-south-eastern-pacific-coast-using-molecular-markers
#6
Natalia Leiva, Zambra Lã  Pez, Marà  A Teresa Gonzà  Lez, Gabriela Muà  Oz
Metacercarial stages of digeneans were collected from decapod crustaceans inhabiting intertidal rocky zone of central Chile. The digeneans were identified through a molecular analysis based on the V4 region of the 18S ribosomal RNA gene. We analyzed 356 crustaceans belonging to 10 species, 115 intertidal fish belonging to 6 species and 4 specimens of 1 coastal bird species. In total, 74.1% of crustaceans were parasitized with metacercariae. We found 1 species of Opecoelidae. This species showed low genetic divergence (0% and 0...
November 3, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27805842/neospora-caninum-in-wild-waterfowl-occurrence-of-parasite-dna-and-low-antibody-titers
#7
Guido Rocchigiani, Alessandro Poli, Simona Nardoni, Papini Roberto, Francesca Mancianti
Thirty-five adult waterfowl (14 males and 21 females) representing various orders and species were sampled during the hunting season from 2015 to 2016. Antibodies to Neospora caninum were detected by IFAT on blood samples, while heart and brain were subjected to molecular analysis for the detection of Neospora caninum DNA. Twelve birds (34.3%) (6 Anas crecca, 3 Anas platyrhynchos, 2 Anas penelope, 1 Anas acuta) showed antibodies versus N. caninum, while 10 animals out of 35 (4 Anas crecca, 2 Anas platyrhynchos, 2 Anas penelope, 1 Anas acuta, and 1 Vanellus vanellus) scored positive for at least 1 sample, with an overall prevalence of 28...
November 2, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27788338/congenital-filariasis-caused-by-setaria-bidentata-nematoda-filarioidea-in-the-red-brocket-deer-mazama-americana
#8
Luis Antonio Gomez-Puerta, Pedro Mayor
The filarial nematode Setaria bidentata was found in 10 of 31 fetuses of the red brocket deer (Mazama americana) from the Loreto region of the Peruvian Amazon. A total of 25 specimens were collected and morphologically identified as S. bidentata. Filarial nematodes were found in the peritoneal cavity of 9 deer fetuses and the thoracic cavity of 1 fetus. Most specimens were adult stage. In this report, we provide morphometric data for these filarial specimens. This is the first study to demonstrate prenatal S...
October 27, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27788039/endogenous-life-cycle-of-eimeria-melanomytis-apicomplexa-eimeriidae-from-the-dusky-rice-rat-melanomys-caliginosus-rodentia-cricetidae-sigmodontinae-in-costa-rica
#9
Misael Chinchilla, Idalia Valerio, Ronald Sanchez, Donald Duszynski
Endogenous stages of the life cycle of Eimeria melanomytis, infecting the peripheral epithelial cells of villi of the small intestine of experimentally-infected young dusky rice rats, Melanomys caliginosus, were studied. Giemsa-stained mucosal scrapings and histological sections were examined for all the stages. Eimeria melanomytis has 3 generations of meronts (M), different in size, shape and number of merozoites (m), and in size, shape and location of the nuclei within the cytoplasm of the meronts. The 3 meront types, M1-M3, respectively, had 11-14 (m1), 7-10 (m2), and 20-30 (m3) merozoites...
October 27, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27788020/nematofauna-of-rodents-of-the-families-heteromyidae-and-cricetidae-from-the-mexican-plateau
#10
Josà Carlos Iturbe-Morgado, Jorge Falcà N-Ordaz, Georgina Lira-Guerrero, Jesà S Fernà Ndez, Roxana Acosta
As a part of an ongoing project to inventory the helminth parasites of rodents in Mexico, 85 specimens of 2 families of rodents were collected from the Mexican Plateau: Cricetidae (Neotoma sp., Neotoma leucodon, Onychomys arenicola, Peromyscus sp., Peromyscus eremicus and Reithrodontomys sp.) and Heteromyidae (Chaetodipus sp., Chaetodipus eremicus, Chaetodipus hispidus, Dipodomys merriami, Dipodomys ordii, Dipodomys ornatus, Dipodomys spectabilis, Liomys irroratus, Perognathus sp. and Perognathus flavus). A total of 13 taxa of helminth were found: Heteromyoxyuris longejector, Heteromyoxyuris otomii, Heteromyoxyuris sp...
October 27, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27775481/isolation-and-rflp-genotyping-of-toxoplasma-gondii-in-free-range-chickens-gallus-domesticus-in-grenada-west-indies-revealed-widespread-and-dominance-of-clonal-type-iii-parasites
#11
Alfred Chikweto, Ravindra N Sharma, Keshaw P Tiwari, Shiv K Verma, Rafael Calero-Bernal, Tiantian Jiang, Chunlei Su, Oliver C Kwok, Jitender P Dubey
The objectives of the present cross sectional study were to isolate and genotype Toxoplasma gondii in free-range chickens from Grenada, West Indies. Using the modified agglutination test, antibodies to T. gondii were found in 39 (26.9%) of 145 free-range chickens with titers of 25 in 7chickens; 50 in 6 chickens; 100 in 2 chickens; 200 or higher in 24 chickens. The hearts of the 39 seropositive chickens were bioassayed in mice; viable T. gondii was isolated from 20 and further propagated in cell culture. Genotyping of T...
October 24, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27762668/platynosomum-illiciens-trematoda-dicrocoeliidae-in-captive-black-tufted-marmoset-callithrix-penicillata-primates-cebidae-from-brazil-a-morphometric-analyses-with-taxonomic-comments-on-species-of-platynosomum-from-nonhuman-primates
#12
Hudson Alves Pinto, Vitor Luis Tenà Rio Mati, Diego Florencio Pujoni, Alan Lane de Melo
The trematodes belonging to the genus Platynosomum are biliary parasites of birds and mammals (domestic and wildlife) in tropical and subtropical areas of the globe. Despite several reports on platynosomosis in captive nonhuman primates, mainly in South America, the taxonomy of species of Platynosomum that infect these hosts remains confused, and it is not clear whether the species found in cats is the same that infects nonhuman primates. Because a detailed morphological study of Platynosomum from nonhuman primates is lacking, in this study we analyzed specimens of Platynosomum recovered from the biliary system of Callithrix penicillata kept in captivity in an animal facility...
October 20, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27762663/a-new-genus-and-two-new-species-of-proteocephalidean-tapeworms-cestoda-from-cichlid-fish-perciformes-cichlidae-in-the-neotropical-region
#13
Alain de Chambrier, Carlos Daniel Pinacho-Pinacho, Jesus Servando Hernà Ndez-Orts, Tomà ŠScholz
Cichlidocestus n. gen. is proposed to accommodate 2 new species of proteocephalidean cestodes, Cichlidocestus gillesi n. sp. from Cichlasoma amazonarum in Peru Amazonia (type species) and Cichlidocestus janikae n. sp. from Hypsophrys nicaraguensis (all Perciformes: Cichlidae) in Costa Rica. The new genus is unique among all but 1 proteocephalidean genera in the position of the ovary that occupies the middle and posterior thirds of proglottids (versus the ovary in the posterior third of proglottids near their posterior margin in all but 1 remaining taxa)...
October 20, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27755914/larval-biology-and-environmental-tolerances-of-the-king-crab-parasite-briarosaccus-regalis
#14
Leah Marie Sloan, Sarah Mincks Hardy
Rhizocephalan barnacles in the genus Briarosaccus parasitize and castrate king crab hosts, thereby preventing host reproduction and potentially altering host abundance. To better understand how environmental factors in Alaska may influence Briarosaccus prevalence, we studied the effects of temperature and salinity on the larvae of Briarosaccus regalis (previously B. callosus). Nauplius larvae were reared at 7 temperatures (2 to 16 C) and 8 salinities (19 to 40) to determine larval survival and development rates...
October 18, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27754773/four-new-species-of-eimeria-apicomplexa-eimeriidae-from-emoia-spp-skinks-sauria-scincidae-from-insular-pacific-with-a-summary-of-coccidia-from-skinks-of-papua-new-guinea
#15
Chris T McAllister, Donald W Duszynski, Christopher C Austin, Robert N Fisher
Between September and November 1991, 54 adult skinks from 15 species including 5 seaside skinks (Emoia atrocostata), 1 Pacific blue-tailed skink (Emoia caeroleocauda), 2 Fiji slender treeskinks (Emoia concolor), 15 white-bellied copper-striped skinks (Emoia cyanura), 1 Bulolo River forest skink (Emoia guttata), 6 dark-bellied copper-striped skinks (Emoia impar), 5 Papua five-striped skinks (Emoia jakati), 2 Papua slender treeskinks (Emoia kordoana), 3 Papua robust treeskinks (Emoia longicauda), 1 brown-backed forest skink (Emoia loveridgei), 3 Papua black-sided skinks (Emoia pallidiceps), 2 Papua white- spotted skinks (Emoia physicae), 2 Papua yellow-head skinks (Emoia popei), 1 Papua brown forest skink (Emoia submetallica), and 5 Fiji barred treeskinks (Emoia trossula) were collected by hand or blowpipe from several localities on Rarotonga, Cook Islands, Ovalau Island, Fiji, and Papua New Guinea (PNG) and their feces examined for coccidians...
October 18, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27723440/hairworm-infection-and-seasonal-changes-in-paratenic-hosts-in-a-mountain-stream-in-japan
#16
Junpei Yamashita, Takuya Sato, Katsutoshi Watanabe
For parasites with complex life cycles, the ecological traits determining host competence and seasonal changes in infection in natural habitats are often unclear, which makes it difficult to predict infection dynamics, including disease outbreaks. Hairworms (Phylum: Nematomorpha) require both aquatic and terrestrial hosts to complete their life cycle. Although hairworm host competencies have been tested in laboratory experiments, knowledge of the paratenic hosts (aquatic insect larvae) in their natural habitats is limited...
October 10, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27723436/transient-expression-of-plasmodium-berghei-msp8-and-hap2-in-the-marine-protozoan-parasite-perkinsus-marinus
#17
Emma R Cold, Gerardo R Vasta, Josà A Fernà Ndez-Robledo
Perkinsus marinus is a protozoan parasite of molluscs that can be propagated in vitro in a defined culture medium, in the absence of host cells. We previously reported that P. marinus trophozoites can be transfected with high efficiency by electroporation using a plasmid based on MOE, a highly expressed gene, and proposed its potential use as a "pseudoparasite". This is a novel gene expression platform for parasites of medical relevance for which the choice of the surrogate organism is based on phylogenetic affinity to the parasite of interest, while taking advantage of the whole engineered surrogate organism as a vaccination adjuvant...
October 10, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27723433/temporal-community-structure-in-2-gregarines-rotundula-gammari-and-heliospora-longissimi-co-infecting-the-amphipod-gammarus-fasciatus
#18
Rita Lynn Grunberg, Michael V K Sukhdeo
This study surveyed gregarine parasites that infect the amphipod, Gammarus fasciatus, to investigate temporal dynamics in infracommunity structure. We sampled a population of hosts for two years from the north branch of the Raritan River in New Jersey. These hosts were infected with 2 direct life cycle gregarine parasites, Rotundula gammari and Heliospora longissimi. Infections were separated temporally, with the prevalence of R. gammari peaking within the amphipod population in the fall (prevalence = 78% yr 1and 97% yr 2) and H...
October 10, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27723428/microhabitat-selection-and-eyefluke-infection-levels-in-the-western-mosquitofish-gambusia-affinis
#19
Shane L Griffin, Nichole Carpenter, Autumn Smith-Herron, Kristin K Herrmann
A variety of trematode species infect the eyes of fish as second intermediate hosts. In most cases the definitive host is a piscivorous bird. Studies of a few species have shown an increase in transmission due to decreased visual acuity of the fish host. However, this may vary depending on trematode microhabitat choice within the eye. Some trematode species are found in the lens, some in the vitreous humor and others have been reported from the retina. Here we report 3 genera of eyeflukes in 3 locations of the eye in the intermediate fish host, Gambusia affinis...
October 10, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27700620/earliest-evidence-of-toxocara-in-a-1-2-million-year-old-extinct-hyena-pachycrocuta-brevirostris-coprolite-from-nw-pakistan
#20
Angela Perri, Susann Heinrich, Shira Gur-Arieh, Jeffrey J Saunders
The study of fossil parasites can provide insight into the antiquity of host-parasite relationships and the origins and evolution of these paleoparasites. Here, a coprolite (fossilized feces) from the 1.2-million-year-old paleontological site of Haro River Quarry in northwestern Pakistan was analyzed for paleoparasites. Micromorphological thin sectioning and Fourier-Transform Infrared Spectrometry (FTIR) analysis confirms the coprolite belonged to a bone-eating carnivore, likely the extinct giant short-faced hyena (Pachycrocuta brevirostris)...
October 4, 2016: Journal of Parasitology
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