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haemonchus contortus

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https://www.readbyqxmd.com/read/28420411/characterization-of-a-novel-aspartyl-protease-inhibitor-from-haemonchus-contortus
#1
Baojie Li, Javaid Ali Gadahi, Wenxiang Gao, Zhenchao Zhang, Muhammad Ehsan, Lixin Xu, Xiaokai Song, Xiangrui Li, Ruofeng Yan
BACKGROUND: Aspartyl protease inhibitor (API) was thought to protect intestinal parasitic nematodes from their hostile proteolytic environment. Studies on Ostertagia ostertagi, Ascaris suum and Brugia malayi indicated that aspins might play roles in nematode infection. In a recent study, proteins differentially expressed between free-living third-stage larvae (L3) and activated L3 (xL3) of Haemonchus contortus were identified by 2D-DIGE. API was found downregulated in xL3 when compared with L3...
April 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28414046/caffeoyl-and-coumaroyl-derivatives-from-acacia-cochliacantha-exhibit-ovicidal-activity-against-haemonchus-contortus
#2
G F Castillo-Mitre, A Olmedo-Juárez, R Rojo-Rubio, M Cortázar-González, P Mendoza-de Gives, E E Hernández-Beteta, D E Reyes-Guerrero, M E López-Arellano, J F Vázquez-Armijo, G Ramírez-Vargas, A Zamilpa
Ethnopharmacology relevance: Acacia cochliacantha is a small tree whose foliage is traditionally used in Mexico for treatment of kidney pain, gastrointestinal illnesses and to kill intestinal parasites. In recent decades, the study of vegetal extracts has offered other possible alternatives for the control of Haemonchus contortus. Considering that this nematode affects dramatically the health and productivity of small ruminants, the aim of this study was to identify the anthelmintic compounds from A. cochliacantha hydro-alcoholic extract (HA-E) through an ovicidal test...
April 14, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28407808/nested-pcr-assay-for-detection-of-schistosoma-japonicum-infection-in-domestic-animals
#3
Xin Zhang, Chuan-Chuan He, Jin-Ming Liu, Hao Li, Ke Lu, Zhi-Qiang Fu, Chuan-Gang Zhu, Yi-Ping Liu, Lai-Bao Tong, De-Bao Zhou, Li Zha, Yang Hong, Ya-Mei Jin, Jiao-Jiao Lin
BACKGROUND: Schistosomiasis japonica is a common zoonosis. Domestic animals are the primary source of infection and play an important role in disease transmission. The prevalence and infectivity of this disease in domestic animals in China have significantly decreased and, for this reason, diagnostics with a higher sensitivity have become increasingly necessary. It was reported that polymerase chain reaction (PCR)-based methods could be used to detect schistosome infection in humans and animals and presented a high sensitivity and specificity...
April 13, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28402951/characterization-of-a-secreted-macrophage-migration-inhibitory-factor-homologue-of-the-parasitic-nematode-haemonchus-contortus-acting-at-the-parasite-host-cell-interface
#4
Yujian Wang, MingMin Lu, Shuai Wang, Muhammad Ehsan, RuoFeng Yan, XiaoKai Song, LiXin Xu, XiangRui Li
Modulation and suppression of the immune response of the host by nematode parasites have been reported extensively and the migration inhibitory factor (MIF) is identified as one of the major immunomodulator. In the present study, we cloned and produced recombinant MIF protein from the small ruminant's nematode parasite Haemonchus contortus (rHCMIF-1), and investigated its immunomodulatory effects on goat monocyte. Enzymatic assays indicated that rHCMIF-1 possessed tautomerase activity. Immunohistochemical test demonstrated that the native HCMIF-1 protein was predominantly localized at the body surface and internal surface of the worm's gut...
March 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28391070/can-haemonchus-placei-primary-infected-na%C3%A3-ve-lambs-withstand-haemonchus-contortus-infections
#5
Regina Celis Pereira Reiniger, Luciana Laitano Dias de Castro, Magda Vieira Benavides, Maria Elisabeth Aires Berne
An experiment was conducted with the objective of evaluating whether a 5000 L3 larvae Haemonchus placei primary infection, a less pathogenic parasite species for sheep, could attenuate highly pathogenic Haemonchus contortus infections in lambs. Thirty nine 6-month-old lambs were divided in three primary-infection groups: (HcPI) H. contortus-primary infected lambs, (HpPI) H. placei-primary infected lambs, and (CTRL) non-infected control lambs. Later, these same individuals, then aged 10-month old, were cross challenged with Haemonchus parasite species, creating four groups: HcPI challenged with H...
February 28, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28389861/in-vitro-larvicidal-effect-of-a-hydroalcoholic-extract-from-acacia-cochliacantha-leaf-against-ruminant-parasitic-nematodes
#6
Agustín Olmedo-Juárez, Rolando Rojo-Rubio, Alejandro Zamilpa, Pedro Mendoza de Gives, Javier Arece-García, María Eugenia López-Arellano, Elke von Son-de Fernex
The aim of this study was to evaluate the in vitro lethal effect of a hydroalcoholic extract (HAE) from Acacia cochliacantha leaf against three gastrointestinal nematodes species (Haemonchus contortus, H. placei and Cooperia punctata) of domestic ruminants. The HAE was assessed using five concentrations: 100, 125, 175, 150 and 200 mg/ml; 0.5% Ivermectin was used as a positive control and distilled water, as negative control. The data were normalized using the square root and analysed with a completely randomized design through ANOVA analysis using the general lineal model (GLM) of the SAS program...
April 8, 2017: Veterinary Research Communications
https://www.readbyqxmd.com/read/28345265/cytokine-and-antioxidant-gene-profiles-from-peripheral-blood-mononuclear-cells-of-pelibuey-lambs-after-haemonchus-contortus-infection
#7
Zaira Estrada-Reyes, Ma Eugenia López-Arellano, Felipe Torres-Acosta, Alberto López-Reyes, Alfredo Lagunas-Martínez, Pedro Mendoza-de-Gives, Roberto González-Garduño, Sara Olazarán-Jenkins, David Reyes-Guerrero, Gabriel Ramírez-Vargas
The expression profiles of cytokines and anti-oxidant genes were determined from an experimental infection with H. contortus in Pelibuey lambs. The infection was followed for 34 days (d) to determine the number of eggs per gram (epg) and the packed cell volume (PCV). Differential white cell counts and expression profile estimations of IL2, IL4, IL5, IL6, IL8, IL10, IL13, FCεR1A, GPX and SOD1 were determined at 0 h, 4 h, 2 d and 14 d post-infection (PI) in infected and control groups. Comparison of the fold-change between 0 and 4 h, 4 h and 2 d, and 2 and 14 d periods was performed...
March 27, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28316426/genotyping-of-benzimidazole-resistant-and-susceptible-isolates-of-haemonchus-contortus-from-sheep-by-allele-specific-pcr
#8
Karthik Mohanraj, Subhra Subhadra, Aravindan Kalyanasundaram, Manikkavasagan Ilangopathy, Muthusamy Raman
Extensive and indiscriminate use of the benzimidazole class of drugs has led to the onset of anthelmintic resistance. In tropical countries like India, Haemonchus contortus is the most pathogenic parasite infecting sheep and goats. The widespread presence of resistant helminths (especially H. contortus) threatens the livestock farming. The use of various drugs has led to single nucleotide polymorphism that causes specific amino acid substitutions in β-tubulin protein of H. contortus to confer resistance. This emphasizes the need for a survey on the present status of resistance in India...
March 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28288755/anthelmintic-activity-of-plant-extracts-from-brazilian-savanna
#9
Andreia F Oliveira, Livio M Costa Junior, Aldilene S Lima, Carolina R Silva, Maria N S Ribeiro, José W C Mesquista, Cláudia Q Rocha, Marcelo M P Tangerina, Wagner Vilegas
Helminth infections represent a serious problem for the production of small ruminants that is currently aggravated by resistance to anthelmintic products and has induced a search for control alternatives, such as natural products. In this study, extracts of Turnera ulmifolia L. (leaves and roots), Parkia platycephala Benth. (leaves and seeds) and Dimorphandra gardneriana Tul. (leaves and bark), which have been cited in ethnoveterinary studies and selected naturally by goats in the cerrado (Brazilian savanna), were tested in vitro against Haemonchus contortus...
March 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28262394/the-in-vitro-anthelmintic-properties-of-browse-plant-species-against-haemonchus-contortus-is-determined-by-the-polyphenol-content-and-composition
#10
G Mengistu, H Hoste, M Karonen, J-P Salminen, W H Hendriks, W F Pellikaan
The aims of the present study were to (a) evaluate the anthelmintic activity of 10 East African browse plant extracts, (b) examine their role in inhibition of Haemonchus contortus larval exsheathment, (c) establish relationship between inhibition of larval exsheathment and browse plant extract polyphenol composition. Acetone/water (70/30%) extracts of air dried leaves of Acacia etbaica, Cadaba farinosa, Capparis tomentosa, Dichrostachys cinerea, Dodonaea angustifolia, Euclea racemosa, Maerua angolensis, Maytenus senegalensis, Rhus natalensis and Senna singueana were used...
December 31, 2016: Veterinary Parasitology
https://www.readbyqxmd.com/read/28259774/exploration-of-interaction-zones-of-%C3%AE-tubulin-colchicine-binding-domain-of-helminths-and-binding-mechanism-of-anthelmintics
#11
Prabodh Ranjan, Sivakumar Prasanth Kumar, Vijayakrishna Kari, Prakash Chandra Jha
Numerous studies postulated the possible modes of anthelmintic activity by targeting alternate or extended regions of colchicine binding domain of helminth β-tubulin. We present three interaction zones (zones vide -1 to -3) in the colchicine binding domain of Haemonchus contortus (a helminth) β-tubulin homology model and developed zone-wise structure-based pharmacophore models coupled with molecular docking technique to unveil the binding hypotheses. The resulted ten structure-based hypotheses were then refined to essential three point pharmacophore features that captured recurring and crucial non-covalent receptor contacts and proposed three characteristics necessary for optimal zone-2 binding: a conserved pair of H bond acceptor (HBA to form H bond with Asn226 residue) and an aliphatic moiety of molecule separated by 3...
February 24, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28250429/exploring-the-microbial-community-microflora-associated-with-ovine-haemonchus-contortus-macroflora-field-strains
#12
Saeed El-Ashram, Xun Suo
High-throughput sequencing technology has shown tremendous promise for microbial community composition and diversity. Illumina MiSeq platform was exploited to study the microbial community associated with the different stages of the life-cycle of ovine Haemonchus contortus field strains using two distinct amplification primer sets (targeting V3-V4, and V5-V7). Scanning electron microscope and polymerase chain reaction coupled with Illumina MiSeq platform were employed to confirm the absence of any parasite surface contamination by intact bacteria or their DNA products...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28246451/gastrointestinal-parasitism-of-goats-in-hilly-region-of-meghalaya-india
#13
Meena Das, R Laha, A Goswami, A Goswami
AIM: The aim of this study was to determine the prevalence of gastrointestinal (GI) parasitic infections in goats of hilly region of Meghalaya. MATERIALS AND METHODS: A total of 834 fecal samples of goats were screened for 1 year (2014-2015) using flotation techniques. RESULTS: The overall prevalence of GI parasitic infections in goats was 28.65%. Season-wise highest infections were recorded during rainy season (34.92%) followed by cool (26...
January 2017: Veterinary World
https://www.readbyqxmd.com/read/28242041/a-novel-snapback-primer-probe-assay-for-the-detection-and-discrimination-of-sympatric-haemonchus-species-using-dna-melting-analysis
#14
Rudolf Pichler, Katja Silbermayr, Kathiravan Periasamy
Different sympatric species of Haemonchus parasites infecting ruminants and camels can be distinguished morphologically, but involves tedious microscopic examinations, measurements and several other limitations. Information on internal transcribed spacer-2 (ITS-2) sequence provides confirmatory differentiation of sympatric Haemonchus species. The present study introduces a novel, snapback primer probe based, real time PCR assay for the differentiation of three sympatric Haemonchus species, H. contortus (Hco), H...
February 20, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28239871/the-effect-of-ovine-peripheral-blood-mononuclear-cells-on-haemonchus-contortus-larval-morbidity-in-vitro
#15
E A Shepherd, J J Garza, S P Greiner, S A Bowdridge
The objective of this study was to determine the effects of peripheral blood mononuclear cells (PBMC), derived from parasite-resistant St. Croix (STC) hair sheep and parasite-susceptible Suffolk (SUF) sheep, on Haemonchus contortus L3 stage larval death in vitro, with or without autologous serum. Larval morbidity was quantified by measuring larval ATP concentration following incubation with PBMC. Larvae exposed to either STC- or SUF-derived PBMC had lower ATP than live larvae (0.12 μmol/L ATP and 0.16 μmol/L ATP vs 0...
February 26, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28238472/modulation-of-haemonchus-contortus-infection-by-depletion-of-%C3%AE-%C3%AE-t-cells-in-parasite-resistant-canaria-hair-breed-sheep
#16
Julia N Hernández, Els Meeusen, Michael Stear, Francisco Rodríguez, David Piedrafita, Jorge F González
Canaria Hair Breed (CHB) sheep display resistance against the adult stage of the nematode, Haemonchus contortus. Previous studies have suggested significant correlations between γδ(+) T lymphocytes and fecundity of female adult worms, suggesting a novel role in immune modulation by these cells. The largest proportion of γδ(+) T lymphocytes in sheep are the subpopulation of γδ(+)/WC1(+) T cells. The aim of this study was to evaluate the effect of γδ(+)⁄WC1(+) T cell depletion via infusion of anti-γδ/WC1 monoclonal antibody (mAb) on the subsequent immune response of CHB sheep infected with H...
February 21, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28146155/predatory-activity-of-butlerius-nematodes-and-nematophagous-fungi-against-haemonchus-contortus-infective-larvae
#17
Manoel Eduardo da Silva, Miguel Angel Mercado Uriostegui, Jair Millán-Orozco, Pedro Mendoza de Gives, Enrique Liébano Hernández, Fabio Ribeiro Braga, Jackson Victor de Araújo
The purpose of this study was to evaluate the predatory activity of the nematode Butlerius spp. and fungal isolates of Duddingtonia flagrans, Clonostachys rosea, Arthrobotrys musiformis and Trichoderma esau against H. contortus infective larvae (L3) in grass pots. Forty-eight plastic gardening pots containing 140 g of sterile soil were used. Panicum spp. grass seeds (200 mg) were sown into each pot and individually watered with 10 mL of tap water. Twelve days after seeding, the pots were randomly divided into 6 groups (n=8)...
January 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/28144765/control-of-haemonchus-contortus-in-sheep-using-basidiocarps-of-agaricus-blazei-murril
#18
Thallyta Maria Vieira, Leydiana Duarte Fonseca, Gabriela Almeida Bastos, Viviane de Oliveira Vasconcelos, Maria Luíza França Silva, Franciellen Morais-Costa, Adriano Vinícius de Paiva Ferreira, Neide Judith Faria de Oliveira, Eduardo Robson Duarte
OBJECTIVE: This study evaluated the effects in vitro and in vivo of Agaricus blazei against Haemonchus contortus in sheep. METHODS: The in vitro efficacy of aqueous extract on egg hatching inhibition (EHI) was investigated and after 72 h incubation with varying concentrations the effects on, blastomeres, embryonated eggs, and first stage larvae (L1) were evaluated. Larval development inhibition (LDI) for dry powder and the aqueous extract were evaluated in fecal cultures of sheep infected with H...
January 31, 2017: Veterinary Research Communications
https://www.readbyqxmd.com/read/28127366/antigenic-cross-reactivity-among-haemonchus-contortus-oesophagostomum-columbianum-and-trichuris-ovis-of-goat
#19
Ruma Jas, Joydeb Ghosh, Kinsuk DAS
BACKGROUND: Cross antigenicity is the major problem in developing a reliable tool for immunodiagnosis and immunoprophylaxis of parasitic diseases. Mixed infection due to different types of gastrointestinal parasites is more common than single species infection under field condition. METHODS: The present study was undertaken to detect antigenic cross-reactivity among Haemonchus contortus, Oesophagostomum columbianum and Trichuris ovis of goats by SDS-PAGE and western blot analysis using hyperimmune sera (HIS) rose in rabbit separately against the antigens of the three nematode species...
October 2016: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28098507/development-and-evaluation-of-a-loop-mediated-isothermal-amplification-lamp-assay-for-the-detection-of-haemonchus-contortus-in-goat-fecal-samples
#20
X Yang, M W Qi, Z Z Zhang, C Gao, C Q Wang, W Q Lei, L Tan, J L Zhao, R Fang, M Hu
Haemonchus contortus is one of the most significant strongylid nematodes infecting small ruminants, and it causes great economic losses to the livestock industry worldwide. Accurate diagnosis of H. contortus is crucial to control strategies. Traditional microscopic examinations are the most common methods for the diagnosis of H. contortus , but they are time-consuming and inaccurate. Molecular methods based on PCR are more accurate, but need expensive machines usually only used in the laboratory. Loop-mediated isothermal amplification (LAMP) is a rapid, simple, specific, and sensitive method that has been widely used to detect viruses, bacteria, and parasites...
April 2017: Journal of Parasitology
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