Objective To analyze the prevalence of dengue fever in Guangzhou based on circuit-qi theory.Methods Data on dengue fever cases in Guangzhou from January 21,2012,to January 19,2024 were collected.And then the incidence of dengue fever was analyzed under the circuit-qi conditions of dominant qi,guest qi,celestial qi,joining of guest qi with dominant qi,and dissimilation of circuit and qi.Results Higher incidence of dengue fever in Guangzhou was presented under the circuit-qi conditions of the fifth qi of the dominant qi in each year,shaoyang minister fire of the guest qi,shaoyin monarch fire of the celestial qi,guest qi restricting dominant qi in the joining of guest qi with dominant qi,shaoyang minister fire(guest qi)joining with yangming dry-metal(dominant qi)in the pattern of guest qi restricting dominant qi.The outbreak of dengue fever under the circuit-qi conditions of dissimilation of circuit and qi showed no statistically significant difference.Conclusion Over the 12-year period from 2012 to 2024,the prevalence of dengue fever in Guangzhou exhibited a 4-5-year cyclical pattern,often with consecutive outbreaks over two years.The prevalence of dengue fever in Guangzhou is associated with the factors of dampness and heat in the theory of five circuits and six qi,while has less relation with dissimilation of circuit and qi.

Objective To investigate the characteristics of traditional Chinese medicine(TCM)syndromes in patients with influenza complicated with pneumonia and to provide references for TCM treatment strategies.Methods A retrospective analysis was conducted on 189 cases of influenza complicated with pneumonia,which were treated in the outpatient or inpatient department of Guangdong Provincial Hospital of Chinese Medicine from January 2016 to December 2023.Frequency analysis,factor analysis,and cluster analysis were performed to summarize the distribution patterns of TCM syndromes in these patients.Results(1)Clinical characteristics:Among the 189 patients,162 were infected with influenza A virus,27 with influenza B virus,and 1 with co-infection of both viruses.There were 93 males(49.2％)and 96 females(50.8％).The age of the patients ranged from 19 to 96 years,with a mean of(68.06±19.08)years.(2)TCM four-examination findings:The top four clinical symptoms were cough,fever,expectoration,and fatigue.Regarding tongue manifestations,the predominant tongue colors were red,dark red,and pale with dark hue,while the primary tongue coatings were yellow greasy and white greasy.The most common pulse patterns were slippery,wiry,and rapid.(3)Syndrome distribution characteristics:Factor analysis revealed that the disease location was primarily lung and spleen,with cold,heat,and phlegm as the main pathological factors.Cluster analysis identified three distinct syndrome types:exterior cold with interior heat syndrome,phlegm-turbidity obstructing internally syndrome,and phlegm-stasis obstructing the lung syndrome.Conclusion The predominant TCM syndromes in influenza complicated with pneumonia are exterior cold with interior heat syndrome,phlegm-turbidity obstructing internally syndrome,and phlegm-stasis obstructing the lung syndrome.The disease primarily affects the lung and spleen,with cold,heat,and phlegm as the major pathological factors.Attention should also be paid to the influence of"stasis"as a pathological factor on these patients.