Sampling survey of disability in 0-6 year-old children in China.

Objective: To investigate the current status of disabled children and prevalence of disabilities in children aged 0-6 years and their risk factors, and to provide scientific evidence for making relevant policies for disabled children.

Methods: In a community-based cross-sectional study, multi-phase, stratified, unequal proportional and cluster sampling was adopted to survey 60 124 children aged 0-6 years. All the investigated children were screened for disabilities, and those with positive screening tests were further diagnosed by various specialties.

[Study on the coinfection of three tick-borne infectious diseases in China using polymerase chain reaction method].

Objective: To study the existence of Ehrluichiosis, lyme disease and tick-borne spotted fever coinfection in some areas in China.

Methods: Using polymerase chain reaction (PCR), B. burgdorferi sensu lato, spotted fever group (SFG) Rickettsiae and human granulocytic ehrlichia (HGE), Ehrlichia chaffeensis (EC) were detected in ticks and mouse samples collected from Inner Mogolia autonomous region, Heilongjiang province, Beijing and Fujian province.

[A new type of spotted fever group Rickttsiaes detected in the area of Changbai mountain, Jilin province].

Objective: In order to find out the current situation of tick-borne spotted fever in the area of Changbai mountain, Jilin province.

Methods: In this study, a polymerase chain reaction (PCR) method was developed with primers R. rOmpA 190.

[Typing of hemorrhagic fever with renal syndrome by cluster analysis].

Objective: To make an inquiry into method of typing of hemorrhagic fever with renal syndrome (HFRS).

Method: Average monthly rates were calculated on the basis of data from 1995 to 1999, then cluster analysis was carried out to type out endemic areas.

Results: Compared with the results of 36 surveillance spots from 1980 to 1992, twenty-four surveillance spots had the same results (66.

[Study on the application of geographic information system in spatial distribution of hemorrhage fever with renal syndrome in China].

Objective: To analyze the spatial distribution of hemorrhagic fever with renal syndrome (HFRS) in China by geographic information system, and to draw up a map on HRFS risk areas.

Methods: A set of database was set up using the information collected and linked to electronic maps of China in a software ArcGIS 8.01 from 41 HFRS surveillance sites during 1995 - 1998.

[A case-control study on the vitamin D receptor gene polymorphisms and susceptibility to pulmonary tuberculosis].

Objective: To investigate the association between the genetic polymorphisms of VDR gene and susceptibility to pulmonary tuberculosis.

Methods: Case-control study was conducted. PCR-RFLP technique was used to detect the C/T polymorphism in VDR gene.

Prevalence of Anaplasma phagocytophila and Borrelia burgdorferi in Ixodes persulcatus ticks from northeastern China.

A total of 1,345 Ixodes persulcatus ticks collected from northeastern China were investigated for the presence of Anaplasma phagocytophila and Borrelia burgdorferi by a nested polymerase chain reaction (PCR). Sixty-two (4.6%) ticks were positive for A.