ObjectiveTo describe the characteristics of the nasopharyngeal microbiota in children under 5 years of age in Haidong City, Qinghai Province and analyze its associated factors, so as to provide basic data for the evolution and development of nasopharyngeal microbiota in children. MethodsA total of 230 community children from Haidong City, Qinghai Province were included in the study. Participants’ basic information was collected by local volunteers from parents/guardians at enrollment. 16S rDNA sequencing was used to identify the bacterial diversity and abundance of nasopharyngeal microbial community. Bioinformatics methods were used to analyze the characteristics of the nasopharyngeal microbiota, compare the differential species, and investigate the correlation with age. ResultsThere was no statistical difference in either Chao1 index or Shannon index of nasopharyngeal microbial communities among children with different ages (P>0.05). Besides, the structure of nasopharyngeal microbiota in children of different ages was different, either (P=0.020). Age, ethnicity and delivery mode, to some extent, could explain the differences in the structure of nasopharyngeal microbiota in children. There were statistically significant differences in the abundance of Dolosigranulum, Staphylococcus and Corynebacterium in the nasopharyngeal microbiota of children with different ages (P<0.05). Differential analysis revealed that Corynebacterium was found to be over-represented in children under 1 year of age, while Dolosigranulum was found to be over-represented in children between 2 and 3 years old. Furthermore, the results of correlation analysis showed that, Moraxella was positively correlated with Corynebacterium, Dolosigranulum and Streptococcus, but negatively correlated with Pseudomonas. In addition, a strong positive correlation was detected between the Dolosigranulum and Corynebacterium. ConclusionThe diversity of nasopharyngeal microbial community among children under 5 years in Haidong City, Qinghai Province is stable. However, there are differences in the species structure, mainly in the abundance difference of Dolosigranulum, Staphylococcus and Corynebacterium. This study provides basic data on the evolution and maturation of nasopharyngeal microbial communities in early childhood, which can provide a scientific basis for the early prevention and diagnosis of respiratory tract infections in children.

ObjectiveTo understand the current status of primary healthcare workers’ knowledge of hepatitis B and their willingness to engage in non-discriminatory behaviors， to explore the factors influencing their willingness， and to provide a basis for health education on hepatitis B for primary healthcare workers in Qinghai Province. MethodsA questionnaire survey was conducted among primary healthcare institutions in eight cities （prefectures） of Qinghai Province using a combination of random sampling and convenience sampling. The questionnaire included demographic information， knowledge related to hepatitis B， and willingness to engage in non-discriminatory behaviors. ResultsA total of 393 subjects were included in the survey. The accurate awareness rate of hepatitis B transmission route among primary healthcare workers in Qinghai Province was 36.89%. Of the respondents， 46.31% were unwilling to live with family members infected with HBV or carriers， and 50.13% were unwilling to dine with friends infected with HBV or carriers. The willingness of primary healthcare workers to engage in non-discriminatory behaviors related to hepatitis B varied by different places of residence， gender， marital status and per capita household income （P<0.05）. Regarding different dimensions of HBV-related knowledge， there were significant differences in age， education level， and per capita household income for transmission route （P<0.05）. Vaccination showed significant differences based on marital status and per capita family income （P<0.05）. There were significant differences in treatment and outcome among different gender， education level， and per capita family income. Anti-discrimination policies varied significantly by place of residence， age， ethnicity， and per capita income. Multivariate logistic regression analysis showed that primary healthcare workers’ knowledge of hepatitis B transmission route was a significant factor influencing their willingness to engage in non-discriminatory behaviors （OR=0.49， 95%CI：0.29‒0.84）. ConclusionIt is essential to continuously strengthen hepatitis B health education for primary healthcare workers in western China to reduce the willingness to engage in non-discriminatory behaviors towards hepatitis B and protect the rights of HBV-infected individuals.