viral conjunctivitis
Introduction
Introduction to viral conjunctivitis Viral conjunctivitis develops symptoms after about 5 to 12 days of incubation, including conjunctival hyperemia, watery secretions, eye irritation, and upper and lower eyelids when awake. Symptoms often appear in both eyes, and usually begin at a glance. Many patients have been exposed to conjunctivitis and/or have recently contracted a respiratory infection. Conjunctiva and sacral conjunctiva are congested, conjunctival follicles appear in the conjunctiva, and lymph nodes enlarge and pain in the ear. basic knowledge The proportion of illness: 0.001% Susceptible people: no specific people Mode of infection: non-infectious Complications: corneal ulcer glaucoma cataract
Cause
Cause of viral conjunctivitis
Virus infection (60%):
1. Infected by adenovirus type 8, 19 and 37, of which type 8 is more common, highly contagious, can be sporadic or prevalent. 2. It is an outbreak of self-limiting infectious disease. It is highly contagious and can be rapidly spread. The pathogen is enterovirus 70.
Unclean hygiene habits (30%):
Viral conjunctivitis is highly contagious and is transmitted by droplets, contaminants, and by hand to the eye. The patient does not wash his hands after touching his or her eyes or nasal secretions, and contacts the infected eyes to contact non-infected eyes. Poor hygiene practices such as the use of towels and pillows with others can cause cross-contamination.
Prevention
Viral conjunctivitis prevention
1. Patients should pay attention to rest and diet should be light.
2. Washing towels, handkerchiefs, washbasins, etc. should be used separately to avoid transmitting viral conjunctivitis to others.
Complication
Viral conjunctivitis complications Complications corneal ulcer glaucoma cataract
When inflammation affects the cornea or causes complications, it can cause vision damage and even blindness.
Symptom
Viral conjunctivitis symptoms Common symptoms Intraocular foreign body inflammatory cells infiltrate photophobia
Symptoms appear after about 5 to 12 days of incubation, including conjunctival hyperemia, watery secretions, eye irritation, and upper and lower eyelids when they wake up. Symptoms often appear in both eyes, and usually begin at a glance. Many patients have been exposed to conjunctivitis and/or have recently contracted a respiratory infection. Conjunctiva and sacral conjunctiva are congested, conjunctival follicles appear in the conjunctiva, and lymph nodes enlarge and pain in the ear.
Severe viral conjunctivitis patients can complain of obvious photophobia and foreign body sensation. The patient's conjunctival surface may have fibrin pseudomembranes and inflammatory cells and/or focal corneal inflammation. Even after conjunctivitis subsides, use slit lamp to check Residual corneal scar formation (0.5~1.0mm) can be seen for 2 years or more. This corneal scar formation can cause vision loss and significant glare.
Examine
Examination of viral conjunctivitis
an examination
Ophthalmic examination: general examination of the eye, including eye appendages and anterior segment examinations. Eye appendage examinations include examination of the eyelids, conjunctiva, tears, eyeball position, and eyelids.
Eyelid examination: It is usually used for observation and palpation in natural light. The main observations: 1 eyelids with or without congenital anomalies, such as eyelid defects, cleft stenosis, ptosis and so on. 2 eyelid skin abnormalities, such as red, swollen, hot, pain, subcutaneous emphysema, lumps and so on. 3 The position of the eyelid is abnormal, such as the width and width of the bilateral cleft palate, and the presence or absence of internal and external valgus. 4 edge and eyelashes are abnormal. Laryngeal examination: including the lacrimal gland and the lacrimal duct. Check the presence or absence of a lump in the lacrimal gland area, pay attention to the presence or absence of internal and external valgus and occlusion in the location of the punctum, whether there is redness, tenderness and fistula in the lacrimal sac area, whether the secretions overflow from the punctum when the lacrimal sac is squeezed, and the secretion of tears is checked by the device. Quantity, whether the lacrimal duct is narrow and obstructed.
Conjunctival examination: pay attention to the color of the conjunctiva, smooth and transparent, with or without congestion and edema, nipple hyperplasia, follicles, scars, ulcers and new masses. Eyeball and eyelid examination: When checking, pay attention to the size of the eyeball, the shape and position of the eyeball, and whether there is any involuntary nystagmus.
Diagnosis
Diagnosis and identification of viral conjunctivitis
Diagnostic criteria
1. According to clinical manifestations, it can be diagnosed.
2. Secretion smear microscopy should find mononuclear cells, which is helpful for diagnosis.
Differential diagnosis
Acute bacterial conjunctivitis: acute onset, tears, foreign body sensation, burning sensation or stinging or other symptoms, as well as swelling of the eyelids, conjunctival hyperemia and conjunctival surface secretions. There is a large amount of mucopurulent secretion in the conjunctival sac. Even catarrhal marginal corneal infiltration or ulceration.
