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Acute conjunctivitis is a common disease associated with high morbidity and economic burden. To clarify the etiological characteristics of acute conjunctivitis in Beijing, surveillance of acute conjunctivitis was conducted from July to October during 2007-2012 by collecting eye swabs from patients treated at surveillance hospitals affiliated with a surveillance program of 18 districts Center for Disease Prevention and Control in Beijing. Coxsackievirus A24 variant (CA24v), enterovirus 70 (EV70), human adenovirus (HAdV), herpes simplex virus (HSV), and chlamydia were identified by PCR. Phylogenetic analysis of the VP1 region of CA24v was conducted. Comparisons of proportions and statistical significance were performed using the chi-square test. HAdV was found to be the most prevalent pathogen, followed by CA24v, chlamydia, and HSV. Significant differences in the symptoms of ocular pain, photophobia, and epiphora were identified among the 4 agents. The prevalence of HAdV- and CA24v-mediated conjunctivitis peaked in July or August and September or October, respectively. Nucleotide sequences of the VP1 regions among the isolated CA24v strains shared 92.8%-100% homology. In conclusion, HAdV followed by CA24v, chlamydia, and HSV were the most common causative agents of acute conjunctivitis in Beijing. Comprehensive, continuous surveillance and advanced laboratory techniques are needed for further studies.

Etiology of Acute Conjunctivitis Due to Coxsackievirus A24 Variant, Human Adenovirus, Herpes Simplex Virus, and Chlamydia in Beijing, China