[Show abstract][Hide abstract] ABSTRACT: In recent years, the number of human rabies cases in the People's Republic of China has increased during severe epidemics in 3 southern provinces (Guizhou, Guangxi, and Hunan). To analyze the causes of the high incidence of human rabies in this region, during 2005-2007, we collected 2,887 brain specimens from apparently healthy domestic dogs used for meat consumption in restaurants, 4 specimens from suspected rabid dogs, and 3 from humans with rabies in the 3 provinces. Partial nucleoprotein gene sequences were obtained from rabies-positive specimens. Phylogenetic relationships and distribution of viruses were determined. We infer that the spread of rabies viruses from high-incidence regions, particularly by long-distance movement or transprovincial translocation of dogs caused by human-related activities, may be 1 cause of the recent massive human rabies epidemics in southern China.
[Show abstract][Hide abstract] ABSTRACT: Human rabies virus vaccine strain CTN181 from China was sequenced. The overall length of the genome was 11,923 nucleotides (nt), comprising a leader sequence of 58 nt, nucleoprotein (N) gene of 1353 nt, phosphoprotein (P) gene of 894 nt, matrix protein (M) gene of 609 nt, glycoprotein (G) gene of 1575 nt, RNA-dependent RNA polymerase (RdRp, L) gene of 6387 nt, and a trailer region of 70 nt. The five monocistrons are separated by intergenic regions (IGRs) of 2, 5, 5 and 24 nucleotides (nt), respectively. Two obvious differences between CTN181 and the other rabies virus vaccine strains were (1) the putative stop/polyadenylation signal of the G gene has only one poly (A) tract for CTN181, and (2) the start of the open reading frame for L has two repeats of ATG for CTN181. Both were similar to the SHBRV-18 (silver-haired bat-associated RV strain 18) strain. In addition, some mutations and new functional regions were discovered that are presumed crucial to the function of leader region and L protein. There is an equal role for all five genes in the phylogenetics of rabies virus.
Virus Research 09/2008; 135(2):260-6. · 2.75 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Characterization of rabies virus phosphoprotein through analyzation of genetic variations about rabies virus phosphoproteins in high-incidence regions in China.
The nucleotide sequence of the P gene of Guangxi, Guizhou and Hunan provinces positive sample's were sequenced, and the P region's similarity and phylogenetic analyses were completed by using softer wares.
The similarity of P region's nucleotide sequence is 82.1%-100%, while, the similarity of amino acid sequence is 87.5%-100%. A little variation in phosphoprotein cannot influence its biological functions.
All rabies viruses isolated from Guangxi, Guizhou and Hunan provinces belong to genotype 1 and share same phylogenesis and same genome characteristic; Virus distribution presents unique Characterization; Some virus isolates from Hunan province and Thailand may come from the same virus.
Zhonghua shi yan he lin chuang bing du xue za zhi = Zhonghua shiyan he linchuang bingduxue zazhi = Chinese journal of experimental and clinical virology 07/2008; 22(3):165-7.
[Show abstract][Hide abstract] ABSTRACT: To investigate the situation of dog rabies and analyze it's relationship with human rabies.
In Guizhou, Guangxi and Hunan provinces which suffered from rabies most heavily, one or two cities were selected respectively from regions with high-, middle-, low-incidence rate of human rabies as investigation spots where Dogs' brain specimens were collected and detected with both direct immunofluorescence assay (IFA) and RT-PCR.
A total of 2887 specimens were collected and 66 of these were positive for IFA and RT-PCR. Therefore, the rate of positive specimens was 2.3%. However, there was not a close relationship in the incidence rate of dog rabies and human rabies.
Dog's infection situation of rabies contributed to the severe epidemic of human rabies.
Zhonghua shi yan he lin chuang bing du xue za zhi = Zhonghua shiyan he linchuang bingduxue zazhi = Chinese journal of experimental and clinical virology 07/2008; 22(3):161-4.
[Show abstract][Hide abstract] ABSTRACT: Characterization of RdRp gene (L) of rabies virus aG and CTN181 strain in China.
Overlapped fragments were amplified and assembled. Then characterization and phylogenetic analyses as well as prediction of functional regions were performed using biologic softwares.
L gene of CTN181 and aG strains were composed with 6387nt and 6384nt respectively and there were two repeated ATG in the start of L gene in CTN181 strain. In addition, some mutations and new functional regions were discovered and presumed to be crucial to the role of these regions in replication of rabies virus. Analyses of L gene provide new insight into the functional regions, and phylogenetic analyses showed that human vaccine strain aG were independent to others recommended by WHO.
The characterization of complete L genes will be helpful for research on new functional regions, antiviral drugs targeted at RdRp and phylogenetic analyses.
Zhonghua shi yan he lin chuang bing du xue za zhi = Zhonghua shiyan he linchuang bingduxue zazhi = Chinese journal of experimental and clinical virology 07/2008; 22(3):171-3.
[Show abstract][Hide abstract] ABSTRACT: To establish a molecular diagnostic method for rabies virus(RV) based on TaqMan PCR.
BaseD on the rabies virus nucleoprotein gene sequences published in GenBank, RV specific primers and probe were designed by Primer Premier 5.0. The primers and probe were optimized and the sensitivity, specificity,and reproducibility of the system were tested. Quantitative standard curve of RV TaqMan PCR was established. Some RV samples were detected using this system.
The optimized primers and probe were 0.6 micromol/L and 0.2 micromol/L. Reproducibility test showed that coefficient variables were all less than 5% in 4 different system. Quantification standard curve based on the genomic copy was drawn. RV detection using the established method proved that TaqMan PCR was more sensitive and easier performed than traditional RT-PCR.
TaqMan PCR for RV detection had been established, which was more sensitive and specific than the general RT-PCR.
Zhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi 11/2006; 27(10):889-93.
[Show abstract][Hide abstract] ABSTRACT: Mosquitoes were collected in Heilongjiang province in 2002, four virus strains were isolated by inoculation of homogenates onto BHK cell lines. The viruses were identified. Multiple alignment and phylogenetic analysis were carried out by Clustal X (1.8) program.Amino acid (AA) analysis was carried out by GENEDOS (3.2).
Biological characters of four newly isolated strains were examined and it was found that all of them could produce cytopathogenic effect (CPE) in BHK cells, killing sucking mice. Serological tests showed that all of these stains reacted positively to JEV antibodies. PrM and E gene regions were amplified and sequenced. Phylogenic analysis showed that all the newly isolated JEV strains belong to genotype III. Using the vaccine strains (SA14-14-2) as control, analysis of the E gene of the new strains and two JEV strains (47, Ha-3) isolated previously from Heilongjiang province showed that these new strains' nucleotide sequence had a homology of up to 99.9% and the amino acid sequence homology up to 99.8%, respectively. Compared with the standard JE vaccine strain SA-14-14-2 and the four new strains, the nucleotide sequence homology was 97.3% and amino acid sequence homology was between 96.8% and 97.0%, respectively. Compared with vaccine strain, there were seven common variations in all the four newly isolated strains.
Four JE virus strains were isolated in Heilongjiang province. As compared to the vaccine strain, six variations were found in the newly isolated strains at the eight sites relevant to the virulence of the virus.
Zhonghua shi yan he lin chuang bing du xue za zhi = Zhonghua shiyan he linchuang bingduxue zazhi = Chinese journal of experimental and clinical virology 01/2006; 19(4):307-11.