chronic catarrhal conjunctivitis
Introduction
Introduction to chronic catarrhal conjunctivitis Chronic catarrhal conjunctivitis is a chronic inflammation of the conjunctiva caused by a variety of causes, with multiple bilateral onset. Depending on the cause, the symptoms and eye performance are different. The patient feels foreign body sensation, dryness, itching, tingling and visual fatigue. When the eye is examined, the light is only mildly congested and the surface is smooth. There may be a little viscous secretion in the conjunctival sac; while long-term stimuli of chronic inflammation are characterized by conjunctival hyperemia, hypertrophy, papillary hyperplasia, velvety-like, mucus or mucopurulent discharge. basic knowledge The proportion of illness: 0.5% -1% (usually after acute conjunctivitis) Susceptible people: no special people Mode of infection: non-infectious Complications: keratitis scleritis
Cause
Causes of chronic catarrhal conjunctivitis
(1) Causes of the disease
Infection factor
The most common bacteria are Staphylococcus aureus and Moraxella. Since both bacteria have the potential to cause eyelid inflammation, the acute conjunctivitis they cause can also be delayed and turned into chronic inflammation. Staphylococcus epidermidis, Escherichia coli, Klebsiella pneumoniae, and Serratia are also common pathogenic bacteria; pneumococci, streptococci may also cause chronic conjunctivitis, especially those with chronic dacryocystitis.
2. Non-infectious factors
It is the most common cause of this disease. The long-term stimulation of the eye by adverse environmental factors, such as sand, smoke, harmful gases, etc.; the effects of certain eye diseases, such as trichiasis, chronic dacryocystitis, obstruction of lacrimal passage, blepharitis, Refractive error, strabismus, etc.; long-term application of certain stimulating drugs or cosmetics can cause chronic inflammation of the conjunctiva.
(two) pathogenesis
Inflammation caused by Staphylococcus aureus can be caused by direct infection of bacteria or toxins released by bacteria. Exotoxin can produce non-specific conjunctivitis or superficial punctate keratitis; skin necrosis is caused by external skin and ulcer The reason is that Moraxella can produce proteolytic enzymes, which cause lesions of the eyelids and ankle skin. Chronic conjunctivitis caused by non-infectious factors is associated with long-term chronic irritation.
Prevention
Chronic catarrhal conjunctivitis prevention
1. Pay attention to the strict disinfection of used facial wash utensils, handkerchiefs and treated medical utensils.
2. Prevent eye infections when you are sick.
3. Medical personnel must wash their hands after disinfection to prevent cross-infection. When examining ultra-acute bacterial conjunctivitis, wear protective glasses.
Complication
Chronic catarrhal conjunctivitis complications Complications keratitis scleritis
Mainly corneal complications, chronic conjunctivitis generally does not occur corneal complications, but corneal complications caused by Staphylococcus aureus is not uncommon, bacterial exotoxin often cause keratitis of the lower corneal epithelium, severe punctate epithelium Lesions can be found throughout the cornea, marginal keratitis also occurs, usually infiltration and ulceration at the limbus at 4 and 8 points, corresponding to limbal congestion; marginal keratitis occurs by the cell wall of S. aureus Metabolites and bacterial exotoxins cause hypersensitivity reactions; hypersensitivity to cell wall antigens can also cause blister keratitis, Moraxella infection can also be complicated by punctate keratitis, subepithelial infiltration, adjacent to the external iliac crest Segmental scleritis.
Symptom
Chronic catarrhal conjunctivitis symptoms Common symptoms Keratitis Eye tingling Foreign body sensation Conjunctiva congestion Purulent discharge Trichiasis Eyes dry congestion
Depending on the cause, the symptoms and eye performance are different. The patient feels foreign body sensation, dryness, itching, tingling and visual fatigue. When the eye is examined, the light is only mildly congested and the surface is smooth. There may be a little sticky secretion in the conjunctival sac; while long-term stimuli of chronic inflammation are characterized by conjunctival hyperemia, hypertrophy, papillary hyperplasia, velvety-like, mucus or mucopurulent discharge, if the eyelid margin is affected at the same time There are lashes, trichiasis, erythema of the eyelids, telangiectasia, and inflammation of the eyelids.
Examine
Chronic catarrhal conjunctivitis examination
Taking conjunctival sac secretion or sputum conjunctival scraping and bacterial culture, pathogenic bacteria and sensitive drugs can be initially identified to guide treatment. For general bacterial conjunctivitis, bacteriological examination is not routine.
Diagnosis
Diagnosis and identification of chronic catarrhal conjunctivitis
Mainly rely on medical history and clinical manifestations, for patients with stubborn and unhealthy, should be done with sputum and conjunctival bacteria culture.
Acute catarrhal conjunctivitis, commonly known as "red eye disease", incubation period of 1 to 3 days, acute onset, two eyes at the same time or separated by 1 to 2 days, conscious tears, foreign body sensation, burning sensation, due to more secretions, often upper and lower eyelashes Sticking together, it is difficult to blink when getting up in the morning, and the subconjunctival hemorrhage can occur in patients caused by Koch-Week bacillus or pneumococcal bacteria. The disease reaches orgasm after 3 to 4 days of onset, and gradually decreases afterwards. Such bacterial conjunctivitis has certain Self-limiting, can be cured in about 2 weeks, occasionally with catarrhal marginal conjunctival infiltration or ulceration, can be identified according to clinical symptoms.
