Bacterial Conjunctivitis vs Viral Conjunctivitis
Bacterial Conjunctivitis and Viral Conjunctivitis are easy to mix up on the boards. Here's a side-by-side comparison — presentation, workup, imaging, and first-line treatment — drawn from our full outlines.
Bacterial Conjunctivitis vs Viral Conjunctivitis at a glance
- Bacterial Conjunctivitis: Acute purulent conjunctival infection — most often self-limited; topical antibiotics shorten course.
- Viral Conjunctivitis: Highly contagious viral inflammation of conjunctiva — typically adenovirus; supportive care only.
Keep comparing — start your free trial
You've used your 2 free previews. Create your free account to see the full Bacterial Conjunctivitis vs Viral Conjunctivitis comparison — plus all 514 diagnosis outlines, 5,500+ board-style questions, and an AI tutor. Your 7-day free trial includes everything, no credit card required.
Side-by-side comparison
| Feature | Bacterial Conjunctivitis | Viral Conjunctivitis |
|---|---|---|
| At a glance | Acute purulent conjunctival infection — most often self-limited; topical antibiotics shorten course. | Highly contagious viral inflammation of conjunctiva — typically adenovirus; supportive care only. |
| Classic presentation | Bilateral mucopurulent discharge with eyelids matted shut on awakening and normal vision in a school-age child.; Eye redness, often beginning unilateral and… | Watery red eye with follicular reaction, ipsilateral preauricular lymphadenopathy, and recent URI in an adult.; Acute red eye, often beginning unilateral and… |
| Workup / key labs | Most cases: clinical diagnosis; no testing needed; Gram stain and culture if: hyperacute presentation, contact lens wearer, severe disease, neonate,… | Clinical diagnosis usually sufficient; Rapid adenovirus antigen test (e.g., AdenoPlus) available in some settings — useful for outbreak control and to avoid… |
| Imaging | Slit-lamp examination if any pain, photophobia, decreased vision, contact lens wear, or treatment failure — exclude keratitis or iritis; Fluorescein staining… | Slit-lamp examination with fluorescein staining if photophobia, decreased vision, contact lens wear, or corneal involvement suspected — looks for dendrites… |
| First-line treatment | Most uncomplicated bacterial conjunctivitis is self-limited; topical antibiotics shorten course and reduce transmission; Topical ocular antibiotic —… | Supportive care — viral conjunctivitis is self-limited (1-3 weeks); Cool compresses to reduce swelling; Artificial tears for lubrication and symptom relief;… |
Drill Bacterial Conjunctivitis vs Viral Conjunctivitis questions on FirstPassPA
Turn this comparison into retention. 5,500+ board-style questions with an AI tutor that explains every answer — free to start, no card required.
Start studying free → Try today's free questionEducational use only. This outline is a study aid for PA students and is not medical advice or a substitute for clinical judgment. FirstPassPA is an independent study tool and is not affiliated with, endorsed by, or sponsored by NCCPA. PANCE® and PANRE® are registered trademarks of the National Commission on Certification of Physician Assistants.