Clinical characteristics of dengue cases infected hepatotropic virus and Mycobacterium tuberculosis in Xishuangbanna prefecture / 中华实验和临床病毒学杂志

Objective@#To study the clinical features of dengue cases infected with hepatotropic virus and Mycobacterium tuberculosis in Xishuangbanna, and to provide evidences to set up effective treatment programs for the dengue patients infected with the other diseases for hospitals.@*Methods@#The clinical characteristics of dengue cases infected hepatotropic virus and Mycobacterium tuberculosis were analyzed retrospectively on their symptoms and biochemical parameters from the People′s Hospital and the Infectious Disease Hospital of Xishuangbanna Prefecture in 2013 and 2015.@*Results@#The clinical characteristics of dengue cases infected with hepatotropic virus were typical, and inclued low incidence of urinary abnormalities, coagulation disorders and high-lactate dehydrogenase. Dengue cases infected with Mycobacterium tuberculosis had high incidence of shock, high-hematocrit, renal function and coagulation abnormalities, which suggested a trend of more serious illness than other groups obviously.@*Conclusions@#The rate of severe disease was higher in dengue cases infected with Mycobacterium tuberculosis than those infected with hepatotropic virus, which suggests that the dengue cases infected with Mycobacterium tuberculosis should be treated timely to reduce the severity of the diseases in the hospital.

Molecular characteristics of dengue virus outbreak in China-Myanmar border region, Yunnan province, 2015 / 中华流行病学杂志

<p><b>OBJECTIVE</b>To understand the molecular characteristics of a dengue virus outbreak in China-Myanmar border region, Yunnan province, 2015 and provide etiological evidence for the disease control and prevention.</p><p><b>METHODS</b>Semi-nested RTPCR was conducted to detect the capsid premembrane (CprM) gene of RNA of dengue virus by using dengue virus NS1 positive serum samples collected in Mengdin township, Gengma county, Yunnan province in July, 2015. Some positive samples were then detected by using PCR with specific primers to amplify the full E gene. The positive PCR products were directly sequenced. Then sequences generated in this study were BLAST in NCBI website and aligned in Megalign in DNAstar program. Multiple sequence alignments were carried out by using Mega 5.05 software based on the sequences generated in this study and sequences downloaded from GenBank, including the representative strains from different countries and regions. Phylogenetic trees were constructed by using Neighbor-Joining tree methods with Mega 5.05 software.</p><p><b>RESULTS</b>Twenty one of 25 local cases and 10 of 14 imported cases from Myanmar were positive for DENV-1. Eight serum samples were negative for dengue virus. A total of 13 strains with E gene (1485 bp), including 8 local strains and 5 imported strains, were sequenced, which shared 100% nucleotide sequence identities. Twelve strains with CprM gene (406 bp) from 9 local cases and 3 imported cases shared 100% nucleotide sequence identities. Phylogenetic analyses based on E gene showed that the new 13 strains clustered in genotype I of dengue virus and formed a distinct lineage.</p><p><b>CONCLUSIONS</b>This outbreak was caused by genotype I of DENV-1, which had the closest phylogenetic relationships with dengue virus from neighboring Burma area. Comprehensive measures of prevention and control of dengue fever should be strengthened to prevent the spread of dengue virus.</p>

Investigation of prevalence of soil-transmitted nematode infections among La-hu Ethnic residents in Xiaojie Township,Jinghong City,Yunnan Province / 中国血吸虫病防治杂志

Objective To understand the prevalence of human intestinal parasite infections in Lahu Ethnic residents so as to provide the evidence for effective control. Methods The prevalence of soil-transmitted nematode infections in local people was determined by Kato-Katz technique and individual sanitary behaviors and habits were requested by a standardized questionnaire in 3 villages of Xiaojie Township,Jinghong City,Yunnan Province. The relationship between intestinal parasite infections and behav-ioral characteristics was analyzed. Results Of 289 subjects,255 individuals were infected with soil-transmitted nematodes;the prevalence was 88.24%. Among the infected individuals,210 were found infected with hookworm and the infection rate was 72.66%;154 subjects were infected with Ascaris lumbricoides and the infection rate was 53.29%;13 were infected with Trichuris trichura,and the infection rate was 4.50%;16 were infected with other parasites and the infection rate was 5.54%. The percentag-es of people with light infection of hookworm,A. lumbricoides and T. trichura were 90.48%,97.40%and 100%,respectively. Con-clusions There is high prevalence of soil-transmitted nematode infections in Lahu Ethnic residents in Jinghong City,but the in-fection intensity was generally low. The control and monitoring of soil-transmitted parasite infections should be strengthened in this area.

Serological survey of Toxoplasma gondii infection in some areas of Pu’er City / 中国血吸虫病防治杂志

Objective To understand the status of Toxoplasma gondii infection in the population of Pu er City so as to pro-vide the evidence for formulating the strategy of toxoplasmosis control. Methods The population from Jingdong Jinggu and Menglian counties in Pu er City was surveyed IgG of T. gondii in serum was detected by ELISA. Results Totally 906 resident serum samples were detected and the IgG positive rate was 24.2%. The positive rates were higher in the aged groups of 30-39 years and 60-69 years and the difference among different aged groups was significant χ2=17.77 P 0.01 . There were no si-gnificant differences between different sexualities and among different educational levels and living habits P 0.05 . The posi-tive rates were 26.6% 194/730 15.5% 22/142 and 8.8% 3/34 in farmers students and other occupations respectively and there was a significant difference among them χ2=12.51 P 0.01 . The positive rates were 23.3% 198/849 and 36.8%21/57 in the farmers who had the habit of rearing pigs in pens and the farmers who had the habit of free ranging pigs respec-tively and there was a significant difference between them χ2=5.33 P 0.05 . Conclusion The IgG positive rate of T. go-ndii is very high in Pu er City and therefore the health education for toxoplasmosis control should be strengthened.