RESUMEN
Hydatid disease does seriously harm to human and livestock ,and causes huge economic losses to the livestock in‐dustry .Despite the fact that people have made some success in prevention and control of animal hydatid disease after making great efforts during the past few decades ,however ,there still remain many problems and challenges .In order to facilitate the research in animal hydatid disease in China ,here we reviewed the problems and challenges in the prevention and control of this disease and put forward several proposals on the treatment and management of dogs ,immunization ,diagnose ,surveillance , etc .
RESUMEN
Dirofilaria immitis (heartworm) infections affect domestic dogs, cats, and various wild mammals with increasing incidence in temperate and tropical areas. More sensitive antibody detection methodologies are required to diagnose asymptomatic dirofilariasis with low worm burdens. Applying current transcriptomic technologies would be useful to discover potential diagnostic markers for D. immitis infection. A filarial homologue of the mammalian translationally controlled tumor protein (TCTP) was initially identified by screening the assembled transcriptome of D. immitis (DiTCTP). A BLAST analysis suggested that the DiTCTP gene shared the highest similarity with TCTP from Loa loa at protein level (97%). A histidine-tagged recombinant DiTCTP protein (rDiTCTP) of 40 kDa expressed in Escherichia coli BL21 (DE3) showed immunoreactivity with serum from a dog experimentally infected with heartworms. Localization studies illustrated the ubiquitous presence of rDiTCTP protein in the lateral hypodermal chords, dorsal hypodermal chord, muscle, intestine, and uterus in female adult worms. Further studies on D. immitis-derived TCTP are warranted to assess whether this filarial protein could be used for a diagnostic purpose.
Asunto(s)
Animales , Perros , Estructuras Animales/química , Anticuerpos Antihelmínticos/sangre , Antígenos Helmínticos/química , Clonación Molecular , Dirofilaria immitis/química , Modelos Animales de Enfermedad , Escherichia coli/genética , Expresión Génica , Datos de Secuencia Molecular , Peso Molecular , Proteínas Recombinantes de Fusión/química , Análisis de Secuencia de ADN , Biomarcadores de Tumor/químicaRESUMEN
Echinococcus granulosus is the causative agent of cystic echinococcosis with medical and veterinary importance in China. Our main objective was to discuss the genotypes and genetic diversity of E. granulosus present in domestic animals and humans in western China. A total of 45 hydatid cyst samples were collected from sheep, humans, and a yak and subjected to an analysis of the sequences of mitochondrial cytochrome b (cytb) gene. The amplified PCR product for all samples was a 1,068 bp band. The phylogenetic analysis showed that all 45 samples were identified as E. granulosus (genotype G1). Ten haplotypes were detected among the samples, with the main haplotype being H1. The haplotype diversity was 0.626, while the nucleotide diversity was 0.001. These results suggested that genetic diversity was low among our samples collected from the west of China based on cytb gene analysis. These findings may provide more information on molecular characteristics of E. granulosus from this Chinese region.
Asunto(s)
Animales , Humanos , Animales Domésticos/parasitología , Composición de Base , Secuencia de Bases , Bovinos/parasitología , China , Citocromos b/genética , ADN de Helmintos/genética , Equinococosis , Echinococcus granulosus/clasificación , Variación Genética , Haplotipos/genética , Mitocondrias/genética , Datos de Secuencia Molecular , Filogenia , Reacción en Cadena de la Polimerasa/veterinaria , Alineación de Secuencia , Análisis de Secuencia de ADN , Ovinos/parasitología , TibetRESUMEN
Taenia pisiformis is one of the most important parasites of canines and rabbits. T. pisiformis cysticercus (the larval stage) causes severe damage to rabbit breeding, which results in huge economic losses. In this study, the genetic variation of T. pisiformis was determined in Sichuan Province, China. Fragments of the mitochondrial cytochrome b (cytb) (922 bp) gene were amplified in 53 isolates from 8 regions of T. pisiformis. Overall, 12 haplotypes were found in these 53 cytb sequences. Molecular genetic variations showed 98.4% genetic variation derived from intra-region. F(ST) and Nm values suggested that 53 isolates were not genetically differentiated and had low levels of genetic diversity. Neutrality indices of the cytb sequences showed the evolution of T. pisiformis followed a neutral mode. Phylogenetic analysis revealed no correlation between phylogeny and geographic distribution. These findings indicate that 53 isolates of T. pisiformis keep a low genetic variation, which provide useful knowledge for monitoring changes in parasite populations for future control strategies.