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279736 occurrences (No.90 in the rank) during 5 years in the PubMed. [no cache] 500 found

205) BZ anthelmintic resistance was evaluated using a nematode-compound in vitro interaction bioassay and the allele-specific polymerase chain reaction technique to detect mutations of residues 198 and 200 on isotype 1 of the β-tubulin gene.

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PMID:24128686 DOI:10.1017/S0022149X13000618

2015 Journal of helminthology

* Benzimidazole-resistant gastrointestinal nematodes in indigenous Chiapas and Pelibuey sheep breeds from Chiapas, Mexico.

- Because of the natural adaptation of Mexican sheep, the aim of the present study was to identify the presence or absence of gastrointestinal parasitic nematodes (GIN) resistant to benzimidazole (BZ) in both Chiapas and Pelibuey sheep breeds on local farms. Both male and female GIN-infected grazing sheep of the two breeds were selected. Sheep faecal samples were collected to obtain infective larvae (L3). This evolving stage of the parasite was used for taxonomic identification of the genus, based on its morphological characteristics. BZ anthelmintic resistance was evaluated using a nematode-compound in vitro interaction bioassay and the allele-specific polymerase chain reaction technique to detect mutations of residues 198 and 200 on isotype 1 of the β-tubulin gene. Three BZ-based compounds (febendazole (FBZ), tiabendazole (TBZ) and albendazole (ABZ)) at concentrations of 1, 0.5, 0.25, 0.125, 0.062 and 0.03 mg/ml were used to estimate the anthelmintic efficacy and lethal dose (LD50, LD90 and LD99) of the drugs. Two parasitic nematodes, Haemonchus and Teladorsagia, were identified in both isolates. Also, the proportions of anthelmintic resistance identified in GIN of the two sheep breeds were 68% in isolates from the Chiapas breed and 71.8% in the Pelibuey breed. The specific lethal activity obtained with FBZ was higher than 90%. However, TBZ and ABZ showed a lethal activity lower than 50%. High variability in the discriminating dose values was found among the BZ drugs. For example, FBZ LD ranged from 0.01 to 1.20 mg/ml; on the other hand, TBZ and ABZ required a dose ranging from 0.178 to 759 mg/ml. In addition, amino acid changes of Phe (TTC) to Tyr (TAC) at codon 200 of the β-tubulin gene, showing resistance to BZ, and no changes at codon 198 Glu (GAA) to Ala (GCA) were observed for both isolates. These results confirmed the presence of a genetic mutation associated with BZ in both Chiapas and Pelibuey nematode isolates.

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(1)15 to	(19)4 types	(37)2 attention	(55)2 lineages
(2)9 sequence	(20)3 characteristics	(38)2 barriers	(56)2 measures
(3)7 and	(21)3 features	(39)2 computational	(57)2 miRNAs
(4)7 cell	(22)3 job	(40)2 constitutive	(58)2 molecular
(5)7 variations	(23)3 target	(41)2 criteria	(59)2 neuronal
(6)6 cognitive	(24)3 tendon	(42)2 deficits	(60)2 or
(7)6 genes	(25)3 therapy	(43)2 differences	(61)2 parameters
(8)6 surface	(26)3 type	(44)2 divergence	(62)2 phytotoxicity
(9)5 antibodies	(27)3 variation	(45)2 effect	(63)2 polymerase
(10)5 for	(28)2 null	(46)2 elements	(64)2 primers
(11)5 phobias	(29)2 ECM	(47)2 ethnocultural	(65)2 protein
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(13)4 effects	(31)2 PCR	(49)2 fault	(67)2 recommendations
(14)4 growth	(32)2 age-dependent	(50)2 function	(68)2 requirements
(15)4 incidence	(33)2 analysis	(51)2 genetic	(69)2 self-efficacy
(16)4 manner	(34)2 antigen	(52)2 genomic	(70)2 targeted
(17)4 motor	(35)2 antigens	(53)2 information	(71)2 tests
(18)4 needs	(36)2 approach	(54)2 inhibitors

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--- WordNet output for specific --- =>特有の, 特効薬, 明確な, 特定の, 種の, はっきりした Overview of noun specific The noun specific has 2 senses (no senses from tagged texts) 1. particular, specific -- (a fact about some part (as opposed to general); "he always reasons from the particular to the general") 2. specific -- (a medicine that has a mitigating effect on a specific disease; "quinine is a specific for malaria") Overview of adj specific The adj specific has 4 senses (first 2 from tagged texts) 1. (39) specific -- ((sometimes followed by `to') applying to or characterized by or distinguishing something particular or special or unique; "rules with specific application"; "demands specific to the job"; "a specific and detailed account of the accident") 2. (5) specific -- (stated explicitly or in detail; "needed a specific amount") 3. specific -- (relating to or distinguishing or constituting a taxonomic species; "specific characters") 4. specific -- (being or affecting a disease produced by a particular microorganism or condition; used also of stains or dyes used in making microscope slides; "quinine is highly specific for malaria"; "a specific remedy"; "a specific stain is one having a specific affinity for particular structural elements") --- WordNet end ---