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Published on: May 1, 2021
Conjunctivitis: A review.
Callum Gin1, Carmel Crock2, Kristen Wells3
1BSc, MD, MMED, Ophthalmology Unaccredited Registrar, Royal Adelaide Hospital, Adelaide, SA; Resident Medical Officer, Royal Victorian Eye and Ear Hospital, Melbourne, Vic.
General practitioners (GPs) can improve the diagnosis of conjunctivitis, a common eye infection. This overview aids GPs in accurately assessing, diagnosing, and managing red eye presentations for better patient outcomes.
Area of Science:
- Ophthalmology
- Primary Care Medicine
Background:
- General practitioners (GPs) frequently encounter diagnostic uncertainty with conjunctivitis and red eye presentations.
- GPs are essential in the initial diagnosis and management of these common ocular conditions.
Purpose of the Study:
- To provide an overview of conjunctivitis, covering its causes, assessment, and diagnosis.
- To guide GPs on safe patient referral and appropriate safety netting for conjunctivitis.
Main Methods:
- Review of conjunctivitis etiology, clinical presentation, and diagnostic challenges.
- Discussion of diagnostic strategies, including laboratory investigations like polymerase chain reaction (PCR) and culture.
- Guidance on referral pathways and safety netting advice for primary care.
Main Results:
- Conjunctivitis is commonly caused by viral, bacterial, and allergic pathogens.
- Accurate clinical diagnosis of conjunctivitis can be challenging, with symptoms potentially lasting up to three weeks.
- Laboratory confirmation via PCR and culture can aid in definitive diagnosis.
Conclusions:
- Accurate diagnosis and management of conjunctivitis by GPs are crucial for optimal patient outcomes.
- Understanding the differential diagnoses and appropriate investigations is key for effective primary care of red eye.
- Safe referral and safety netting are important components of conjunctivitis management in general practice.
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Etiology
Three primary contributing factors have been identified.
Acute Pharyngitis
Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
Classification
Acute pharyngitis can be categorized based on its underlying cause:

