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Published on: July 5, 2017
Etiology of acute conjunctivitis in children
Insights
Common causes of acute conjunctivitis in children include Haemophilus influenzae and adenoviruses. Streptococcus pneumoniae is also implicated. Differentiating viral from bacterial causes clinically is challenging.
Area of Science:
- Ophthalmology
- Pediatrics
- Microbiology
Background:
- Acute conjunctivitis is a frequent pediatric condition with diverse etiologies.
- Accurate diagnosis is crucial for appropriate management and preventing complications.
Purpose of the Study:
- To identify the specific infectious agents causing acute conjunctivitis in children.
- To correlate clinical presentations with identified pathogens.
Main Methods:
- Cultured 99 pediatric patients with conjunctivitis and 102 controls for bacteria (including Haemophilus influenzae), viruses, Chlamydia trachomatis, and mycoplasmas.
- Statistically analyzed the prevalence of isolated agents in cases versus controls.
Main Results:
- Haemophilus influenzae (42%), adenoviruses (20%), and Streptococcus pneumoniae (12%) were significantly associated with conjunctivitis.
- These three agents accounted for 72% of identified cases; dual infections were rare.
- Clinical differentiation between viral and bacterial conjunctivitis was difficult.
Conclusions:
- Haemophilus influenzae and adenoviruses are primary causes of acute conjunctivitis in children.
- Co-occurring symptoms like pharyngitis or otitis can suggest specific pathogens.
- Seasonal variations exist, with adenovirus more common in fall and H. influenzae in winter.
Abstract:
To determine the etiology of acute conjunctivitis in children seen in pediatric practice, 99 patients with conjunctivitis and 102 age-and season-matched controls were cultured for aerobic bacteria including Haemophilus influenzae, and for viruses, Chlamydia trachomatis, and mycoplasmas. Agents statistically associated with conjunctivitis included H. influenzae (42% vs 0%), Streptococcus pneumoniae (12% vs 3%), and adenoviruses (20% vs 0%). One of these three etiologic agents was isolated from 71 (72%) of the patients. Simultaneous infection with two pathogens was uncommon. Staphylococcus aureus was equally prevalent in diseased and control eyes; one strain of C. trachomatis was isolated from a control eye. Although there were variations in the clinical features of viral and bacterial conjunctivitis, differentiation in an individual patient was difficult. An adenovirus was isolated from 11 (65%) of 17 patients who had pharyngitis in addition to conjunctivitis. H. influenzae was isolated from 14 (74%) of 19 children who had both otitis and conjunctivitis. Adenovirus conjunctivitis was common in the fall and H. influenzae in winter.
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