prevalence and genetic diversity of entamoeba species infecting macaques in southwest china.many colonies of macaques (macaca fascicularis and macaca mulatta) are maintained in china, especially in guangxi and guizhou. a total of 803 fresh stool samples infected with entamoeba were obtained from three big colonies of macaques located in southwest china. the samples were examined for the presence of five entamoeba species using pcr. entamoeba nuttalli, entamoeba dispar, entamoeba coli, and entamoeba chattoni infections were detected, but entamoeba histolytica infection was not. this stu ...201323354942
isolation and molecular characterization of entamoeba nuttalli strains showing novel isoenzyme patterns from wild toque macaques in sri lanka.we have proposed the revival of the name entamoeba nuttalli for a virulent ameba strain, p19-061405, from a rhesus macaque and located it phylogenetically between e. histolytica and e. dispar. as e. nuttalli was originally described for an ameba found in a toque macaque in sri lanka, the prevalence and characteristics of entamoeba species in wild toque macaques were examined. pcr analysis of 227 stool samples from six locations showed positive rates for e. nuttalli, e. dispar, and e. histolytica ...201626333681
transmission of entamoeba nuttalli and trichuris trichiura from nonhuman primates to humans. 201526402309
prevalence of entamoeba nuttalli infection in wild rhesus macaques in nepal and characterization of the parasite isolates.we have recently resurrected the name entamoeba nuttalli castellani, 1908 for a potentially virulent ameba isolate, p19-061405, obtained from a rhesus macaque in kathmandu, nepal. the ameba was morphologically indistinguishable from entamoeba histolytica/entamoeba dispar/entamoeba moshkovskii, but located phylogenetically between e. histolytica and e. dispar. to evaluate the prevalence of e. nuttalli infection in wild rhesus macaques, 112 fecal samples were collected in four locations of the kat ...201323370534
correlation between genotypes of trna-linked short tandem repeats in entamoeba nuttalli isolates and the geographical distribution of host rhesus macaques.several polymorphic markers, including serine-rich protein genes, have been used for the genotyping of isolates from the morphologically indistinguishable protozoan parasites entamoeba histolytica, entamoeba dispar, and entamoeba nuttalli. genotypes of trna-linked short tandem repeats (strs) are highly polymorphic, but the correlation with geographical distribution is unknown. we have recently isolated 15 e. nuttalli strains from wild rhesus macaques in four locations in kathmandu valley, nepal. ...201424185530
comparative analysis of genotypic diversity in entamoeba nuttalli isolates from tibetan macaques and rhesus macaques in china.we have recently demonstrated the potentially virulent species entamoeba nuttalli as one of the highly prevalent parasites in rhesus macaques (macaca mulatta) in mount long-hu and gui-yang in china. tibetan macaque (macaca thibetana) is a unique species living in china. to evaluate the prevalence of entamoeba species in wild tibetan macaques, we obtained 89 stool samples in mount e-mei of si-chuan province in china. pcr analysis detected e. nuttalli, entamoeba coli, and entamoeba polecki st2 in ...201626723919
molecular identification of entamoeba species in savanna woodland chimpanzees (pan troglodytes schweinfurthii).to address the molecular diversity and occurrence of pathogenic species of the genus entamoeba spp. in wild non-human primates (nhp) we conducted molecular-phylogenetic analyses on entamoeba from wild chimpanzees living in the issa valley, tanzania. we compared the sensitivity of molecular [using a genus-specific polymerase chain reaction (pcr)] and coproscopic detection (merthiolate-iodine-formaldehyde concentration) of entamoeba spp. we identified entamoeba spp. in 72 chimpanzee fecal samples ...201626935395
high prevalence of entamoeba infections in captive long-tailed macaques in china.long-tailed macaques (macaca fascicularis) are bred in china for export and for use in experiments. entamoeba infections in captive long-tailed macaques were surveyed in one of the biggest colonies located in guangxi province, china. one stool sample was obtained from each of the 152 different cages representing >3,000 macaques in the colony. the samples were examined by pcr for five entamoeba species. the number of detected entamoeba coli infections comprised 94% of the samples, 93% for entamoe ...201121484347
entamoeba histolytica and e. dispar infections in captive macaques (macaca fascicularis) in the philippines.entamoeba histolytica is a protozoan parasite that infects man and animals. this parasite has a global distribution and the disease it causes is usually characterized by diarrhea. in order to detect the parasite, it is necessary to differentiate it from entamoeba dispar. e. dispar appears morphologically similar to e. histolytica but does not cause disease and tissue invasion. this study reports on the prevalence of e. histolytica and e. dispar among captive macaques in a primate facility in the ...201019862480
isolation and characterization of a potentially virulent species entamoeba nuttalli from captive japanese macaques.we have recently proposed revival of the name entamoeba nuttalli castellani, 1908 for a virulent amoeba (p19-061405 strain) isolated from a rhesus monkey (macaca mulatta) and located phylogenetically between e. histolytica and e. dispar. in this study, e. nuttalli was isolated from feces of captive japanese macaques (m. fuscata) in an open-air corral in japan. the sequence of the 18s rrna gene in the isolates differed from the p19-061405 strain in 2 nucleotide positions, but was identical to the ...200919635174
dna characterization of simian entamoeba histolytica-like strains to differentiate them from entamoeba histolytica.two simian entamoeba histolytica-like strains, ehmfas1 and p19-061405, have been suggested to represent a new species based on genetic characterization. sequence analyses of the hexokinase, glucose phosphate isomerase, and phosphoglucomutase genes supported the previous findings of isoenzyme analyses demonstrating a new zymodeme pattern. phylogenetic studies of 18s rdna, 5.8s rdna, the chaperonin 60 gene, and the pyridine nucleotide transhydrogenase gene showed original clusters of simian e. his ...200919471966
an entamoeba sp. strain isolated from rhesus monkey is virulent but genetically different from entamoeba entamoeba sp. strain, p19-061405, was isolated from a rhesus monkey in nepal and characterized genetically. the strain was initially identified as entamoeba histolytica using pcr amplification of peroxiredoxin genes. however, sequence analysis of the 18s rrna gene showed a 0.8% difference when compared to the reference e. histolytica hm-1:imss human strain. differences were also observed in the 5.8s rrna gene and the internal transcribed spacer (its) regions 1 and 2, and analysis of the serin ...200717403547
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