Conjunctivitis is an inflammation of the eyeball conjunctiva and eyelid conjunctiva caused by external stimulation and infection. The conjunctiva contains abundant capillaries, sensory nerve endings and a large number of lymphocytes, which are extremely sensitive to internal or external stimuli. The disease is often caused by minor external or internal stimuli.
Causes of Conjunctivitis in dogs
Mechanical conjunctival trauma: various foreign bodies (dust, fur, insects, etc.) fall into the conjunctival sac or stick to the conjunctiva; Parasites that live in the conjunctival sac (e.g. thelaziasis Canis); Eyelid position changes or structural defects; The eyelids were entropion or valgus, defective, and eyelashes grew abnormally.Chemical ALL kinds of CHEMICAL products or drugs splashing, fumigation: to dog, cat bathing or body hair deworming, the application of fur cleaner or insect repellent into the eye by mistake.
"Secondary to certain infectious diseases: canine distemper, infectious hepatitis, feline viral rhinotracheitis."
"Diseases secondary to adjacent tissues: dacryocystitis, keratitis, sinusitis, nasolacrimal duct obstruction, etc."
Conjunctivitis symptoms
The main symptoms were shame, tears, conjunctival flushing and conjunctival blepharospasm. Serous to purulent discharge was discharged from the inner canthus. It can be divided into catarrhal conjunctivitis and suppurative conjunctivitis."Catarrhal conjunctivitis: The most common clinical form, characterized by conjunctival flushing, swelling, congestion, and secretion of serous, mucous, or mucopurulent secretions." It can be divided into acute and chronic types. The symptoms of acute type are mild conjunctival and fornix slightly swollen, bright red, less secretion, early clear, and then become mucous. Severe eyelid swelling, often heat pain, shame, congestion, and even see blood spots. Inflammation may involve the bulbar conjunctiva. Chronic type is often turned from acute type, the symptoms are often not obvious, the degree of shame is very light or no, slight congestion, dark red conjunctiva.
"Purulent conjunctivitis: occurs as a result of infection with pyogenic bacteria or in the course of an infectious disease, especially distemper." In addition to the general symptoms of conjunctivitis, its symptoms are more severe. It is characterized by a large amount of mucinous or purulent discharge from the eye. The upper and lower eyelid margins and eyelashes are often stuck together by viscous purulent material. If the inflammation is severe or lasts for a long time, conjunctival necrosis, eyeball adhesion, and even corneal ulcer may occur.
Diagnostic criteria for Conjunctivitis in dogs
The diagnosis can be made by laboratory tests and clinical symptoms.Conjunctivitis treatment
If the cause is excluded, the primary disease should be treated. Eyes were washed with 3% boric acid, 0.1% ethacridine (rivanol) or normal saline. Chloramphenicol eye drops and cortisone acetate eye drops were given 3-4 times a day for non-viral infection and intact cornea. When virus infection is suspected, herpes net eye drops or morpholine guanidine eye drops can be used, initially every 2 hours, 5 to 6 times a day after the symptoms are improved. For refractory suppurative conjunctivitis, 1% iodoform ointment was used along with procaine penicillin for subconjunctival or retrobulbar closure.The broad-spectrum antibiotics bacitracin and chloramphenicol should be the first choice for clinical effect. When the effect is not ideal, ciprofloxacin is selected, and cephalosporin is the last choice when the dog has dry eye. Hydrocortisone plus antibiotics were used for nonbacterial, allergic, or corneal bleeding.
