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haemonchus contortus

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https://www.readbyqxmd.com/read/28927469/genetic-diversity-of-haemonchus-contortus-isolated-from-sympatric-wild-blue-sheep-pseudois-nayaur-and-sheep-in-helan-mountains-china
#1
Dong-Dong Shen, Ji-Fei Wang, Dan-Yu Zhang, Zhi-Wei Peng, Tian-Yun Yang, Zhao-Ding Wang, Dwight D Bowman, Zhi-Jun Hou, Zhen-Sheng Liu
BACKGROUND: Haemonchus contortus is known among parasitic nematodes as one of the major veterinary pathogens of small ruminants and results in great economic losses worldwide. Human activities, such as the sympatric grazing of wild with domestic animals, may place susceptible wildlife hosts at risk of increased prevalence and infection intensity with this common small ruminant parasite. Studies on phylogenetic factors of H. contortus should assist in defining the amount of the impact of anthropogenic factors on the extent of sharing of agents such as this nematode between domestic animals and wildlife...
September 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28923082/characterization-of-a-secreted-cystatin-of-the-parasitic-nematode-haemonchus-contortus-and-its-immune-modulatory-effect-on-goat-monocytes
#2
Yujian Wang, Lingyan Wu, Xinchao Liu, Shuai Wang, Muhammad Ehsan, RuoFeng Yan, XiaoKai Song, LiXin Xu, XiangRui Li
BACKGROUND: Haemonchosis is a disease of the small ruminant caused by a nematode parasite Haemonchus contortus, and it is most important and alarming challenges to the small ruminant's production. The infection of the H. contortus could cause high economic losses worldwide. H. contortus is a blood feeding parasite which penetrates into the abomasal mucosa to feed the blood of the host and causing the anemia and decreased total plasma protein. Modulation and suppression of the immune response of the host by nematode parasites have been reported extensively, and the cysteine protease inhibitor (cystatin) is identified as one of the major immunomodulators...
September 18, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28917321/a-panel-of-microsatellite-markers-to-discriminate-and-study-interactions-between-haemonchus-contortus-and-haemonchus-placei
#3
Michelle C Santos, Elizabeth Redman, Mônica R V Amarante, John S Gilleard, Alessandro F T Amarante
Haemonchus contortus and Haemonchus placei are two closely related economically important parasites of ruminants. Their close morphological similarity, common occurrence as co-infections and ability to hybridize makes definitive diagnosis and epidemiological studies in field populations challenging. In this paper, we describe the development of a panel of microsatellite markers that can be used to discriminate and study the genetics of these two parasite species in co-infections and mixed field populations...
September 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28917310/screening-of-a-small-well-curated-natural-product-based-library-identifies-two-rotenoids-with-potent-nematocidal-activity-against-haemonchus-contortus
#4
H M P Dilrukshi Herath, Sarah Preston, Andreas Hofmann, Rohan A Davis, Anson V Koehler, Bill C H Chang, Abdul Jabbar, Robin B Gasser
The control of parasitic roundworms (nematodes) is heavily reliant on the use of a limited number of anthelmintic drugs. However, drug resistance is now very widespread and no vaccines are available, such that the discovery of new chemical entities is crucial. Within this context, we screened a library of pure natural products (n=400) against exsheathed third-stage (xL3) larvae of the parasitic nematode Haemonchus contortus using a whole-organism screening method. We identified two plant-derived rotenoids, deguelin and rotenone, with inhibitory activity on xL3 motility...
September 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28905295/between-breed-variations-in-resistance-resilience-to-gastrointestinal-nematodes-among-indigenous-goat-breeds-in-uganda
#5
R B Onzima, R Mukiibi, A Ampaire, K K Benda, E Kanis
Gastrointestinal nematodes (GINs), Haemonchus contortus, are a major health problem in goat production. Resistance to H. contortus, the most prevalent GIN in Uganda, was studied among three indigenous goat breeds to assess their differences. Twelve male goats of each breed approximately 7 months old of small East African (SEA), Mubende, and Kigezi goats from smallholder farmers in Arua, Mubende, and Kabale were assembled for the study. At the station, they were dewormed with a combination therapy of the broad-spectrum dewormers closantel and albendazole to free the goats of gastrointestinal parasites...
September 13, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28895238/the-use-of-1-h-nmr-metabolomics-to-optimise-the-extraction-and-preliminary-identification-of-anthelmintic-products-from-the-leaves-of-lysiloma-latisiliquum
#6
Gloria Ivonne Hernández-Bolio, Erika Kutzner, Wolfgang Eisenreich, Juan Felipe de Jesús Torres-Acosta, Luis Manuel Peña-Rodríguez
INTRODUCTION: Tannin-rich forages are recognised as an important alternative for the control of gastrointestinal nematodes in small ruminants. Lysiloma latisiliquum, a forage commonly consumed by goats and sheep, has shown anthelmintic activity when tested against Haemonchus contortus. However, to date, the metabolites responsible for the activity are not known. OBJECTIVE: To use (1) H-NMR metabolomics in the extraction and identification of anthelmintic metabolites from L...
September 12, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28883809/recent-research-progress-in-china-on-haemonchus-contortus
#7
REVIEW
Chunqun Wang, Fangfang Li, Zongze Zhang, Xin Yang, Awais A Ahmad, Xiangrui Li, Aifang Du, Min Hu
Haemonchus contortus is one of the most important parasites of ruminants with worldwide distribution that can bring huge economic losses to the breeding industry of cattle, sheep, and goats. In recent 20 years, studies on H. contortus in China mainly focused on the epidemiology, population genetics, anthelmintic resistance, structural and functional studies of important genes regulating the development of this parasite, interaction between parasite molecules and host cells and vaccine development against haemonchosis, and achieved good progress...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28878894/genomic-regions-and-pathways-associated-with-gastrointestinal-parasites-resistance-in-santa-in%C3%A3%C2%AAs-breed-adapted-to-tropical-climate
#8
Mariana Piatto Berton, Rafael Medeiros de Oliveira Silva, Elisa Peripolli, Nedenia Bonvino Stafuzza, Jesús Fernández Martin, Maria Saura Álvarez, Beatriz Villanueva Gavinã, Miguel Angel Toro, Georgget Banchero, Priscila Silva Oliveira, Joanir Pereira Eler, Fernando Baldi, José Bento Sterman Ferraz
BACKGROUND: The aim of this study was to estimate variance components and to identify genomic regions and pathways associated with resistance to gastrointestinal parasites, particularly Haemonchus contortus, in a breed of sheep adapted to tropical climate. Phenotypes evaluations were performed to verify resistance to gastrointestinal parasites, and were divided into two categories: i) farm phenotypes, assessing body condition score (BCS), degree of anemia assessed by the famacha chart (FAM), fur score (FS) and feces consistency (FC); and ii) lab phenotypes, comprising blood analyses for hematocrit (HCT), white blood cell count (WBC), red blood cell count (RBC), hemoglobin (HGB), platelets (PLT) and transformed (log10) egg per gram of feces (EPGlog)...
2017: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/28870237/the-n-and-c-terminal-carbohydrate-recognition-domains-of-haemonchus-contortus-galectin-bind-to-distinct-receptors-of-goat-pbmc-and-contribute-differently-to-its-immunomodulatory-functions-in-host-parasite-interactions
#9
MingMin Lu, XiaoWei Tian, XinChao Yang, Cheng Yuan, Muhammad Ehsan, XinChao Liu, RuoFeng Yan, LiXin Xu, XiaoKai Song, XiangRui Li
BACKGROUND: Hco-gal-m is a tandem-repeat galectin isolated from the adult worm of Haemonchus contortus. A growing body of studies have demonstrated that Hco-gal-m could exert its immunomodulatory effects on host peripheral blood mononuclear cells (PBMC) to facilitate the immune evasion. Our previous work revealed that C-terminal and N-terminal carbohydrate recognition domains (CRD) of Hco-gal-m had different sugar binding abilities. However, whether different domains of Hco-gal-m account differently for its multiple immunomodulatory functions in the host-parasite interaction remains to be elucidated...
September 5, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28831219/effects-of-commonly-used-chemical-fertilizers-on-development-of-free-living-stages-of-haemonchus-contortus-in-experimentally-infected-pasture
#10
Tapas Kumar Roul, Mitra Rajan Panda, Bijayendranath Mohanty, Kautuk Kumar Sardar, Manaswini Dehuri, Ananta Hembram, Trilochan Mohapatra
AIM: The effects of N-P-K fertilizers in the form of urea, single super phosphate and muriate of potash on development of free-living stages of Haemonchus contortus were studied. MATERIALS AND METHODS: Five parasite free experimental plots of 1 m×1 m area, each of paddy leaves (15-day-old) and an equal number of Cynodon dactylon grass were infested with about 10×10(4) eggs/ml phosphate buffer saline along with the application of the calculated amount of fertilizers solution...
July 2017: Veterinary World
https://www.readbyqxmd.com/read/28831218/evaluation-of-crude-larval-protein-and-recombinant-somatic-protein-26-23-rhcp26-23-immunization-against-haemonchuscontortus-in-sheep
#11
Omnia M Kandil, Khaled A Abdelrahman, Hatem A Shalaby, Seham H M Hendawy, Nadia M T Abu El Ezz, Somia A Nassar, James E Miller
AIM: The aim of this study was to evaluate the potential possibility of crude larval and recombinant (rHcp26/23) antigens of Haemonchus contortus for immunization to control sheep hemonchosis. MATERIALS AND METHODS: A total of 21 lambs were divided into five groups. Lambs were immunized with larval and recombinant (rHcp26/23) proteins at day 0 and day 14 and after that challenged with 5000 infective larvae of H. contortus on day 42. An unvaccinated positive control group was challenged with L3 in the meantime...
July 2017: Veterinary World
https://www.readbyqxmd.com/read/28807317/validation-of-the-famacha%C3%A2-system-in-south-american-camelids
#12
Bobby E Storey, Lisa H Williamson, Sue B Howell, Thomas H Terrill, Roy Berghaus, Anand N Vidyashankar, Ray M Kaplan
Haemonchus contortus resistant to multiple anthelmintics threaten the viability of the small ruminant industry in areas where this parasite is prevalent. In response to this situation, the FAMACHA© system was developed and validated for use with small ruminants as a way to detect clinical anemia associated with haemonchosis. Given that H. contortus and multiple anthelmintic resistance is a similar problem in camelids, the FAMACHA© system might also provide the same benefits. To address this need, a validation study of the FAMACHA© system was conducted on 21 alpaca and llama farms over a 2-year period...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28807309/synergistic-interaction-of-ten-essential-oils-against-haemonchus-contortus-in-vitro
#13
L M Katiki, A M E Barbieri, R C Araujo, C J Veríssimo, H Louvandini, J F S Ferreira
Anthelmintic resistance in sheep gastrointestinal nematodes is a worldwide problem. Multi-drug resistant haemonchosis is the most serious impediment for small ruminant systems, and there are no new drug candidates currently under development. Molecules from natural sources have demonstrated anthelmintic activity against parasites. In this work, the monoterpenoids carvacrol, carvone, cineole, linalool, limonene, and thymol and the phenylpropanoids cinnamaldehyde, anethole, vanillin, and eugenol were assessed individually or in mixtures of ten binary, three ternary, and three quaternary combinations using the in vitro egg hatch assay with eggs of a multi-drug resistant strain of Haemonchus contortus...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28807301/a-candidate-recombinant-antigen-for-diagnosis-of-schistosomiasis-japonica-in-domestic-animals
#14
Jintao Feng, Rui Xu, Xin Zhang, Yu Han, Chuanchuan He, Chao Lu, Yang Hong, Ke Lu, Hao Li, Yamei Jin, Jiaojiao Lin, Jinming Liu
Domestic animals infected with Schistosoma japonicum are a major source of infection and play an important role in transmission to humans. A key strategy for the elimination of schistosomiasis is to control the sources of infection. In the present study, we identified a candidate diagnostic antigen-encoding gene, SjMRP1, the putative multidrug resistance protein 1 gene, by screening a cDNA phage display library from 44-day-old S. japonicum worms using IgGs from goat, cattle, and buffalo infected with S. japonicum...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28807282/age-of-haemonchus-contortus-third-stage-infective-larvae-is-a-factor-influencing-the-in-vitro-assessment-of-anthelmintic-properties-of-tannin-containing-plant-extracts
#15
G S Castañeda-Ramírez, C Mathieu, G Vilarem, H Hoste, P Mendoza-de-Gives, P G González-Pech, J F J Torres-Acosta, C A Sandoval-Castro
The larval exsheathment inhibition assay (LEIA) of infective larvae (L3) is an in vitro method used to evaluate the anthelmintic (AH) activity of tannin-containing plant extracts against different species of gastrointestinal nematodes, including Haemonchus contortus. Some conditions remain to be defined in order to standardize the LEIA, i.e. the optimal age of larvae produced from donor animals to use in the assays. Therefore, this study aimed at identifying the effect of age and age-related vitality of H. contortus infective larvae produced under tropical conditions, on the in vitro AH activity measured with the LEIA...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28807275/recombinant-miro-domain-containing-protein-of-haemonchus-contortus-rmiro-1-activates-goat-peripheral-blood-mononuclear-cells-in-vitro
#16
YuLing Wen, YuJian Wang, WenJuan Wang, MingMin Lu, Muhammad Ehsan, XiaoWei Tian, RuoFeng Yan, XiaoKai Song, LiXin Xu, XiangRui Li
In our previous proteomics study, we identified Miro domain-containing protein (Miro-1), an excretory and secretory product of the pole worm, Haemonchus contortus, binds to goat peripheral blood mononuclear cells (PBMCs) in vivo. However, our understanding of the role of Miro-1and its potential immune impact on goat PBMCs is limited. The aim of the present study was to evaluate the effects of Miro-1 on functions of goat PBMCs in vitro. Recombinant protein (rMiro-1) was expressed in a prokaryote and incubated with goat PBMCs...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28767008/the-edible-mushroom-pleurotus-djamor-produces-metabolites-with-lethal-activity-against-the-parasitic-nematode-haemonchus-contortus
#17
Jesús Antonio Pineda-Alegría, José Ernesto Sánchez-Vázquez, Manases González-Cortazar, Alejandro Zamilpa, María Eugenia López-Arellano, Edgar Josúe Cuevas-Padilla, Pedro Mendoza-de-Gives, Liliana Aguilar-Marcelino
Pleurotus djamor is an edible mushroom that has medicinal properties. This study aimed to assess the in vitro activity of P. djamor extracts and fractions against Haemonchus contortus eggs and exsheathed infective larvae (L3). Crude hydroalcoholic extracts were obtained by maceration and fractions were obtained through chromatography. Metabolite identity was determined using gas chromatography/mass spectrometry (GC-MS) analysis. The results showed that P. djamor extracts had no significant activity against eggs at the concentrations used...
August 2, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28765867/-anthelmintic-resistance-in-ruminants-development-diagnostics-and-procedures
#18
Gabriela Knubben-Schweizer, Kurt Pfister
Anthelmintic resistance of gastrointestinal nematodes in small ruminants, but also in cattle and horses, is now found worldwide. The reason for increasing anthelmintic resistance is, in particular, the extensive use of all the anthelmintic agents available on the market. A non-targeted use leads to the selection of naturally occurring resistance genes within parasite populations. The most practical method for evaluating the efficacy of an anthelmintic is the fecal egg-count reduction test. To reduce the rate of anthelmintic resistance development, the available active substances must be applied less and in a targeted manner...
August 2, 2017: Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere
https://www.readbyqxmd.com/read/28757123/molecular-and-biochemical-characterisation-and-recognition-by-the-immune-host-of-the-glyceraldehyde-3-phosphate-dehydrogenase-gapdh-of-the-abomasal-nematode-parasite-teladorsagia-circumcincta
#19
S Umair, C L G Bouchet, J S Knight, A Pernthaner, H V Simpson
A 1023 bp full length cDNA encoding Teladorsagia circumcincta GAPDH (TeciGAPDH) was cloned, expressed in Escherichia coli and the recombinant protein purified and its kinetic properties determined. A phylogenetic tree was constructed using helminth GAPDH sequences. The predicted protein consisted of 341 amino acids and was present as a single band of about 38 kDa on SDS-PAGE. Multiple alignments of the protein sequence of TeciGAPDH with homologues from other helminths showed that the greatest similarity (93%) to the GAPDH of Haemonchus contortus and Dictyocaulus viviparus, 82-86% similarity to the other nematode sequences and 68-71% similarity to cestode and trematode enzymes...
October 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28735356/evaluation-of-anthelmintic-antimicrobial-and-antioxidant-activity-of-chenopodium-album
#20
Bashir A Lone, M Z Chishti, Fayaz Ahmad Bhat, Hidayatullah Tak, Suhaib A Bandh, Abida Khan
The objective of this study was to evaluate the anthelmintic, antimicrobial and antioxidant activities of Chenopodium album against gastrointestinal nematodes of sheep and some pathogenic microbes. A worm motility inhibition assay was used for in vitro study, and a faecal egg count reduction assay was used for an in vivo study. Various concentrations ranging from 100 to 500 μg/ml of the extract were subjected to antimicrobial screening by disc diffusion method against four selected bacterial (Staphylococcus aureus, Klebsiella pneumoniae, Pseudomonas multocida and Escherichia coli) and two fungal (Aspergillus flavus and Candida albicans) strains in order to estimate the medicinal potential of the herb...
July 22, 2017: Tropical Animal Health and Production
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