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Veterinary Parasitology

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https://www.readbyqxmd.com/read/28624132/schizogony-and-gametogony-of-oocyst-deficient-t-263-strain-of-toxoplasma-gondii
#1
J P Dubey
Oocysts are important stage for the spread of Toxoplasma gondii because they are environmentally resistant. Among all hosts of T. gondii, only felids can excrete oocysts. Cats that have excreted T. gondii oocysts after primary infection develop immunity to re-excretion of oocysts, and this immunity appears to be long-lasting. It would be desirable to have a non-infectious vaccine for the prevention of T. gondii infection in cats and to understand mechanism of immunity to excretion of oocysts. An initial step will be to indentify stage/stages of the parasite for induction of immunity...
May 27, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28637587/comparative-study-on-secretome-and-transmembranome-of-immature-and-mature-metacestodes-of-echinococcus-multilocularis
#2
Fuqiang Huang, Zhisheng Dang, Haoji Zhang, Kinpei Yagi, Kyeongsoon Kim, Magona Joseph, Wenjun Pu, Yuzaburo Oku
Alveolar echinococcosis (AE) is a worldwide zoonosis caused by E. multilocularis. Humans become infected through oral ingestion of the eggs. Host of E. multilocularis produces immune responses that help to either reject and/or limit the growth of this parasite, and in response the parasite produces molecules against this immune attack. This study identifies candidate key molecules in the early infection phase and the chronic stage of the parasite infestation, through comparison of gene expression of 4- and 16-week metacestodes...
May 12, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606328/influence-of-physical-and-chemical-factors-on-the-embryonation-hatching-and-infectivity-of-spirocerca-lupi
#3
Alicia Rojas, Niva Freedberg, Alex Markovics, Yuval Gottlieb, Gad Baneth
Spirocerca lupi is a parasitic nematode which causes spirocercosis, a severe disease of dogs. Its life cycle involves dung beetles as intermediate hosts and canids as definitive hosts. The effect of different physical conditions and chemical factors on the embryonation and hatching of S. lupi eggs were investigated in this study in order to understand the triggers for progression in the early development of this parasite. Exposure to potassium dichromate significantly enhanced the embryonation of eggs compared to formaldehyde and controls (p<0...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606327/evaluation-of-oxidant-antioxidant-balance-in-iberian-ibex-capra-pyrenaica-experimentally-infested-with-sarcoptes-scabiei
#4
José Espinosa, Jesús M Pérez, Jorge R López-Olvera, Arián Ráez-Bravo, Francisco J Cano-Manuel, Paulino Fandos, Ramón C Soriguer, José Enrique Granados, Diego Romero
Oxidative stress (OS) is an imbalance between radical-generating and radical scavenging activity, resulting in oxidation products and tissue damage. Although some studies have been done in other species, there is a lack of information about the oxidative/antioxidant status in the Iberian ibex (Capra pyrenaica) affected by sarcoptic mange. To clarify this fact, albumin, catalase (CAT), glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), paraoxonase-1 (PON-1), glutathione reductase (GR), reduced glutathione (GSH): oxidized glutathione (GSSG) ratio, thiobarbituric acid reactive substances (TBARS) and total oxidant status (TOS) concentrations were measured in peripheral blood of ibexes experimentally infested with Sarcoptes scabiei (n=25), as well as in the healthy control group (n=14)...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606326/evaluation-of-the-transcription-of-interleukin-12-in-the-intestinal-mucosa-of-mice-subjected-to-experimental-toxocariasis-and-supplemented-with-saccharomyces-boulardii
#5
Micaele Quintana de Moura, Wesley Douglas da Silva Terto, Sabrina Taiza Jeske, Leonardo Mortagua de Castro, Natália Berne Pinto, Luciana Farias da Costa Avila, Fabio Pereira Leivas Leite, Maria Elisabeth Aires Berne
No abstract text is available yet for this article.
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606325/quantification-of-anti-leishmania-antibodies-in-saliva-of-dogs
#6
Ana Cantos-Barreda, Damián Escribano, Luis J Bernal, José J Cerón, Silvia Martínez-Subiela
Detection of serum anti-Leishmania antibodies by quantitative or qualitative techniques has been the most used method to diagnose Canine Leishmaniosis (CanL). Nevertheless, saliva may represent an alternative to blood because it is easy to collect, painless and non-invasive in comparison with serum. In this study, two time-resolved immunofluorometric assays (TR-IFMAs) for quantification of anti-Leishmania IgG2 and IgA antibodies in saliva were developed and validated and their ability to distinguish Leishmania-seronegative from seropositive dogs was evaluated...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606324/serological-lessons-from-the-bovine-lungworm-dictyocaulus-viviparus-antibody-titre-development-is-independent-of-the-infection-dose-and-reinfection-shortens-seropositivity
#7
Christina Strube, Andrea Springer, Anne-Marie Schunn, Andrew B Forbes
Infections with the bovine lungworm Dictyocaulus viviparus, the causative agent of parasitic bronchitis, are accompanied by substantial economic losses due to impacts on production, clinical respiratory disease or even death of diseased cattle. To detect lungworm antibodies in cattle, an enzyme-linked immunosorbent assay (ELISA) based on recombinant major sperm protein (MSP) has been developed. However, it remained unknown whether the infection dose influences antibody levels, and how acquired immunity influences antibody level patterns during reinfections...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606323/coprodiagnosis-of-echinococcus-granulosus-infection-in-dogs-from-ankara-turkey
#8
Hatice Öge, Semih Öge, Bahadır Gönenç, Oğuz Sarımehmetoğlu, Gökben Özbakış
The present study were undertaken to compare two isolation techniques (centrifugal flotation and sedimentation) for recovering taeniid eggs from faecal samples, to identify E. granulosus DNA from taeniid eggs by PCR, and to determine the prevalence of E. granulosus in dogs in villages. Faecal samples were collected from 100 dogs in Ankara province. Taenia spp. eggs were found in 27% of dogs faeces. Echinococcus granulosus-specific PCR was obtained in 14 (51.85%) of the taeniid eggs-positive samples. As well as finding Taenia eggs in dogs' faeces, we also found eggs of some helminthic parasites; such as Dipylidium caninum, Toxocara canis, Toxascaris leonina, Trichuris sp...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606322/peripheral-and-placental-immune-responses-in-goats-after-primoinfection-with-neospora-caninum-at-early-mid-and-late-gestation
#9
Wagnner José Nascimento Porto, Pilar Horcajo, Pomy de Cássia Peixoto Kim, Javier Regidor-Cerrillo, Elton Amorim Romão, Gema Álvarez-García, Emanuela Polimeni de Mesquita, Rinaldo Aparecido Mota, Luis Miguel Ortega-Mora
Neospora caninum can cause reproductive failure in goats. However, the pathogenesis of neosporosis in this domestic species remains largely unknown. We recently demonstrated that the outcome of experimental infection by N. caninum in pregnant goats is highly dependent on the time of gestation, during which infection occurs. In the present study, we examined the peripheral and placental immune responses in these groups of goats infected with 10(6) tachyzoites of the Nc-Spain7 isolate at early (G1, at day 40 of gestation, dg), mid (G2, 90 dg) and late (G3, 120 dg) gestation, together with a group of non-infected goats as a control group (G4)...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606321/characterization-of-glutathione-s-transferase-and-its-immunodiagnostic-potential-for-detecting-taenia-multiceps
#10
Ying Sun, Yu Wang, Xing Huang, Xiaobing Gu, Weimin Lai, Xuerong Peng, Guangyou Yang
Taenia multiceps is a widespread zoonotic tapeworm parasite which infects cloven-hoofed animals around the world. Animal infection with Coenurus cerebralis, the coenurus larvae of T. multiceps (Tm), is often fatal, which is a major cause of economic losses in stockbreeding. This study amplified the glutathione S-transferase (GST) gene from the total RNA of C. cerebralis. The resulting protein, Tm-GST, consisted of 201 amino acids, and had a predicted molecular mass of 23.1kDa. Its amino acid sequence shares 77...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606320/lice-induced-immuno-oxidative-wreckage-of-goats
#11
Y Ajith, U Dimri, Shanker K Singh, A Gopalakrishnan, Gopinath Devi, M R Verma, Vivek Joshi, Shahjahan Alam
The present study aimed to evaluate the immuno-oxidative patho-biology of lice infestation in goats. Sixty goats were divided into five groups; sucking lice (Linognathus africanus) infested (Group 1, n=12), chewing lice (Bovicola caprae) infested-mild (Group 2, n=12), chewing lice (B. caprae) infested-moderate (Group 3, n=12), chewing lice (B. caprae) infested-severe (Group 4, n=12) and healthy control (Group 5, n=12). To assess the pathological changes, markers of oxidative stress (lipid peroxidation-LPO, reduced glutathione-GSH, superoxide dismutase-SOD, Catalase-CAT and total antioxidant capacity-TAC), the markers of immune status (Tumour necrosis factor alpha- TNF-α, Interleukin-10- IL-10, Transforming growth factor beta 1- TGF-β1, ratios of TNF-α/IL-10 and TNF-α/TGF-β1) and hemato-biochemical status were evaluated...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606319/seroprevalence-of-and-risk-factors-for-neospora-caninum-infection-in-yaks-bos-grunniens-in-china
#12
Qing-Feng Meng, Gui-Zhe Yao, Si-Yuan Qin, Jian Wu, Xi-Chen Zhang, Ya-Duo Bai, Wei Cong, Wei-Li Wang
The aim of the present study was to detect the seroprevalence of Neospora caninum infection in yaks in Gansu province, China. Serum samples from 974 white yaks and 610 black yaks were tested by a commercial competitive-inhibition ELISA for the detection of specific anti-N. caninum antibodies.; N. caninum antibodies were detected in 10.4% of yaks with higher prevalence in black (11.5% of 610) than white yak (8.6% of 974). Age, regions and sampling times were considered as risk factors associated with N. caninum infection...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606318/integrative-taxonomy-of-goezia-spinulosa-nematoda-raphidascarididae-from-arapaimas-in-the-northwestern-brazil
#13
Maralina Torres da Silva, Pedro Hercílio de Oliveira Cavalcante, Ana Carolina Alves de Camargo, Vanessa Aparecida das Chagas Moutinho, Everton Gustavo Nunes Dos Santos, Cláudia Portes Santos
Arapaima gigas, a fish with a high market value, has been farmed in different localities within Brazil. Among its parasites, adults of Goezia spinulosa are reported to cause ulcers in the stomach and to result in the death of farmed fingerlings. Due to the veterinary importance of this nematode in cultured arapaimas, an integrative taxonomic study is proposed, combining morphological, ultrastructural and genetic profiles of this parasite. The fish were obtained from semi-intensive fish farming in Acre State, Brazil...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606317/molecular-occurrence-of-trypanosomes-erythrocyte-and-serum-sialic-acid-concentrations-of-muturu-and-bunaji-cattle-in-benue-state-nigeria
#14
Samuel Ode, Mathew Adamu, Moeti Taioe, Oriel Thekisoe, Sani Adamu, Daniel I Saror
One hundred each, of Muturu and Bunaji cattle were screened, using polymerase chain reaction (PCR), for trypanosomes in Makurdi and Gboko Local Government Areas of Benue State, Nigeria. Erythrocyte surface sialic acid (ESSA) and free serum sialic acid (FSSA) concentrations were determined and compared in both breeds with the aim of providing baseline data for research and diagnostic purposes. Five per cent (5%) and 23% of the Muturu and Bunaji cattle, respectively, were positive for trypanosomes. The result at p=0...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28606316/protective-immune-responses-during-prepatency-in-goat-kids-experimentally-infected-with-eimeria-ninakohlyakimovae
#15
L Matos, M C Muñoz, J M Molina, F Rodríguez, D Perez, A Lopez, O Ferrer, C Hermosilla, A Taubert, A Ruiz
During the first schizogony, the goat coccidia Eimeria ninakohlyakimovae develops macroschizonts in lacteal duct endothelial cells, whose rupture leads to severe ileal damage and clinical signs during the prepatent period. The immune response elicited against early stages of the parasite development still requires to be investigated. In the present study we have evaluated immune reactions in goat kids primary- and challenged-infected with Eimeria ninakohlyakimovae, and sacrificed during prepatency (7days after challenge)...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28579032/genetic-analyses-of-chinese-isolates-of-toxoplasma-gondii-reveal-a-new-genotype-with-high-virulence-to-murine-hosts
#16
J-M Gao, Y-T Xie, Z-S Xu, H Chen, G Hide, T-B Yang, J-L Shen, D-H Lai, Z-R Lun
A great deal of evidence demonstrates that a strongly clonal population structure of Toxoplasma gondii strains exists in humans and animals in North America and Europe, while the strains from South America are genetically separate and more diverse. Potential differences in virulence between different strains mean that an understanding of strain diversity is important to human and animal health. However, to date, only one predominant genotype, ToxoDB#9 (Chinese I), and a few other genotypes, including ToxoDB#205, have been identified in China...
July 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28579031/the-antiparasitic-activity-of-avenacosides-against-intestinal-nematodes
#17
Maria Doligalska, Kinga Jóźwicka, Katarzyna Donskow-Łysoniewska, Małgorzata Kalinowska
Avena sativa L., 1753 (Poaceae) is used as feed for livestock and as a crop rotation agent. The purpose of the study was to examine the molecular mechanisms behind the antihelminth activity of the oat saponins avenacoside B (AveB) and 26-desglucoavenacoside B (26DGAveB) by evaluating their effect on Heligmosomoides bakeri, a parasitic nematode of mice. The avenacosides AveB and 26DGAveB were separated and purified from A. sativa green leaves, and their mycotoxic activity was confirmed against the fungus Trichoderma harzianum...
July 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28579030/broad-spectrum-anthelmintic-resistance-of-haemonchus-contortus-in-northern-nsw-of-australia
#18
Jane Lamb, Tim Elliott, Michael Chambers, Bruce Chick
On a sheep farm in Northern New South Wales (NSW) of Australia a degree of anthelmintic resistance was suspected. With noticeable clinical signs of infection and sheep not responding to treatment, a faecal egg count reduction test was conducted to ascertain the broad spectrum of anthelmintic resistance at this farm. A number of classes of anthelmintics were assessed including organophosphate, macrocyclic lactone (ML) and in combination an ML, benzimidazole, levamisole and salicylanilide. In addition, the more recently registered classes of anthelmintics, monepantel (amino-acetonitrile derivative) and derquantel/abamectin combination (spiroindole+ML) were included...
July 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28579029/pharmacokinetics-and-anthelmintic-efficacy-of-injectable-eprinomectin-in-goats
#19
C Briqué-Pellet, N Ravinet, Y Quenet, M Alvinerie, C Chartier
The objective of this study was to assess the pharmacokinetics and the anthelmintic efficacy of eprinomectin (Eprecis(®) 20mg/mL) following subcutaneous administration to goats. Forty non-lactating female Alpine goats aged between one and three years and weighing between 32.7 and 59.5kg, were randomly allocated to one of the following groups (8 animals per group): two groups were not infected and were treated at a dose of either 0.2 or 0.4mg/kg BW of eprinomectin, two groups were experimentally infected with nematodes and treated at 0...
July 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28579028/cattle-fever-tick-rhipicephalus-boophilus-microplus-acari-ixodidae-potential-control-on-pastures-by-the-application-of-urea-fertilizer
#20
Brenda Leal, Donald B Thomas, Robert Dearth
The southern cattle fever tick, Rhipicephalus (Boophilus) microplus, spends as much as 80-90% of its life cycle as a larva questing for a host. Standard control methods are limited to on-host applications, leaving a need for methods directed at the pasture infesting stages. Reports from Brazil indicate that pasture fertilization can reduce tick numbers. Granular urea was tested using standard pesticide efficacy methods in both the laboratory and field trials to determine if there was a significant impact on adult reproduction and larval survival...
July 15, 2017: Veterinary Parasitology
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