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[The incidence of adenoviruses in viral conjunctivitis].

A study about the incidence of Adenovirus on viral conjunctivitis was conducted. A sample design was made and samples of conjunctival exudate were taken from 150 patients with diagnosis of apparently viral conjunctivitis at the "Ramón Pando Ferrer" Ophthalmological Hospital from July to December, 1994. Samples were inoculated in cell culture and the indirect immunofluorescence technique was applied to those with a cytopathogenic effect that suggested infection due to Adenovirus. Monoclonal antibodies were used against Adenovirus allowing to identify them as part of the Adenoviridae family. The hemagglutination technique was used with erythrocytes of monkeys and rats as an indicator system in order to group the isolates previously identified by the indirect immunofluorescence technique. Later on, it was made an analysis by restriction enzymes of the viral genome to enable typing. The results of this study showed an incidence of Adenovirus on viral conjunctivitis of 20%, with a confidence interval between 14 and 26% and a reliability index of 95%. It was proved that serotype 37 caused conjunctivitis more frequently.

Adenovirus Infections, Human↗

Ten years' surveillance of viral conjunctivitis in Sapporo, Japan.

BACKGROUND: We set out to establish the epidemiology of viral conjunctivitis over a 10-year period in Sapporo, northern Japan. METHODS: A total of 965 patients with clinically suspected viral conjunctivitis during the 10-year period from 1985 to 1994 in Sapporo were evaluated. RESULTS: Among the 965 patients, cumulative frequency of adenovirus (Ad) was 721 (75%). The dominant serotype of Ad changed with time; each serotype peaked at 3- to 5-year intervals. Adenoviral conjunctivitis occurred most often in July and August each year. Ad3 and Ad4 were predominantly identified in patients 30-39 years old. No enterovirus 70 has been detected. Herpes simplex virus (HSV) and Chlamydia trachomatis had no significant peak. HSV was isolated throughout the year, and C. trachomatis had two peaks of detection: in March and from July to September. HSV and C. trachomatis were predominantly detected in patients 20-29 years old. CONCLUSION: In this study, the main etiological agent of viral conjunctivitis in Sapporo, Japan, was Ad; however, attention should be paid to non-adenoviral agents, such as HSV and C. trachomatis, as possible causes of acute conjunctivitis.

Adenovirus Infections, Human↗

A randomized, double-masked trial of topical ketorolac versus artificial tears for treatment of viral conjunctivitis.

OBJECTIVE: To determine if topical ketorolac 0.5% relieves the symptoms and signs of viral conjunctivitis better than artificial tears. DESIGN: Randomized, controlled trial. PARTICIPANTS: One hundred seventeen patients with a clinical diagnosis of viral conjunctivitis were randomized to the treatment group or control group. METHODS: Physicians and patients were masked to treatment. Patients in the treatment group received topical ketorolac 0.5% four times daily. Patients in the control group received artificial tears four times daily. Symptom and sign scores were recorded on the day of recruitment and at the time of a follow-up examination 3 to 4 days later. MAIN OUTCOME MEASURES: Change in six symptoms of conjunctivitis (overall discomfort, itching, foreign body sensation, tearing, redness, and lid swelling) and four signs of conjunctivitis (conjunctival injection, conjunctival chemosis, conjunctival mucus, and lid edema). Adverse effects were also studied. RESULTS: A total of 105 patients returned for their 3- to 4-day follow-up. Both the artificial tear and ketorolac groups showed improvement in all symptom scores at their 3- to 4-day follow-up visit. There was no statistically significant difference between the change in symptom scores between the treatment group and control group in any symptom category except redness. Patients in the control group were more likely to report improvement in redness than those in the treatment group, P = 0.012. There was no statistically significant difference between the change in sign scores between the treatment and control groups. Ketorolac 0.5% was more likely to produce stinging than artificial tears, 59.2% versus 18.8%, P < 0.001. CONCLUSIONS: Topical ketorolac 0.5% used four times daily is no better than artificial tears at relieving the symptoms or signs of viral conjunctivitis and produces more stinging than artificial tears.

Administration, Topical↗

The change of etiological agents and clinical signs of epidemic viral conjunctivitis over an 18-year period in southern Taiwan.

BACKGROUND: Epidemic viral conjunctivitis is a highly contagious eye disease that occurs worldwide and is caused mainly by adenoviruses and enteroviruses. An 18-year analysis of the changes of pathogens and clinical signs in a subtropical and densely populated island presents certain special features. METHODS: We retrospectively analyzed the clinical information and laboratory records of the conjunctivitis patients with positive conjunctival swabs from 1980 to 1997. RESULTS: The positive rate of laboratory diagnosis of epidemic conjunctivitis was 50.0% (1,233/2,467). From 1980 to 1994, the predominant causative agent of adenoviral keratoconjunctivitis was adenovirus type 8 (Ad8), with six genotypes being evolved. Three of the new Ad8 genotypes each caused a new epidemic. After 1995 the predominant adenoviral pathogens shifted to Ad37 and Ad19, and no more Ad8 was isolated. Enterovirus type 70 (EV70) was isolated from four outbreaks of acute hemorrhagic conjunctivitis (AHC) from 1980 to 1984, but rarely in later years. Coxsackievirus A type 24 variant (CA24v), which first appeared in 1985, appeared later as the causes of four major epidemics of AHC from 1985 to 1994. The overall clinical symptoms of viral conjunctivitis were more severe in the 1990s than in the 1980s. CONCLUSION: In southern Taiwan, outbreaks of adenoviral keratoconjunctivitis caused by new genomic variants could be associated with the long-term endemic co-circulation of Ad8, Ad19, and Ad37, while epidemics of CA24v AHC were caused mainly by introduction of new viral strains from neighboring countries. The aggravation of host symptoms in the 1990s needs further investigation and close follow-up.

Adenovirus Infections, Human↗

Comparative studies on aetiology and epidemiology of viral conjunctivitis in three countries of East Asia--Japan, Taiwan and South Korea.

A total number of 1105 cases with viral conjunctivitis, mainly epidemic kerato-conjunctivitis (EKC) consisting of 354 cases from Sapporo, Japan, of 628 from Kaohsiung, Taiwan and of 123 from Busan, Korea, encountered during the periods, 1980-81 and/or 1983, were studied aetiologically and epidemiologically. Patients were aged from 27 days to 88 years with a peak in the 20-29 year age group. Aetiological diagnoses were established in 610 cases (55%), consisting of 536 cases (49%) caused by adenoviruses and of 74 (7%) by EV 70. The most frequently detected agent was Ad 8 (57%), followed by EV 70 (12%), Ad 3 (9%) and Ad 19 (7%). The aetiological profiles of viral conjunctivitis were generally similar in three cities of East Asia. EKC (70%) was mainly caused by Ad 8, Ad 19 and Ad 37, but AHC (13%) by EV 70 and PCF (5%) by Ad 3 and Ad 11. Ad 19 and Ad 37 isolates in three cities were compared with the cleavage patterns with restriction endonucleases, BamHl, Smal, Sall and Hindlll. All of the Ad 19 isolates tested were identical to Ad 19a reported by Wadell et al, and all but three isolates of Ad 37 were identical to the Ad 37 prototype prevalent in Europe and the US. The three isolates of Ad 37, different from the prototype in cleavage pattern with Hindlll, designated as Ad 37A, were detected in Sapporo and Kaohsiung in 1980. From the cleavage patterns with four restriction endonucleases, Hindlll, BamHl, Sa1l and Sstl, the Ad 8 isolates in 1983 were divided into three subtypes, which were associated with the cities isolated.(ABSTRACT TRUNCATED AT 250 WORDS)

Adenoviridae↗