abiola akande roll number : 703. conjunctivitis, also known as pinkeye. it is an inflammation of...
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CONJUCTIVITIS, GLAUCOMA AND FEVER OF UNKOWN ORIGIN.
Abiola Akande Roll number : 703
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Definition
Conjunctivitis, also known as pinkeye. It is an inflammation of the conjunctiva. Conjunctiva: thin, translucent, elastic tissue layer with bulbar and palpebral portions
Bulbar: lines the outer surface of the globe to the limbus (junction of sclera and cornea)
Palpebral: covers the inside of the eyelids Two layers: epithelium, substantia propria
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Types of conjunctivitis
There are different types of conjuctivitis depending on the cause:
Viral conjunctivitis Bacterial conjunctivitisAllergic conjunctivitis
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Viral conjunctivitis
Viral conjunctivitis is often associated with an infection of the upper respiratory tract, a common cold, and/or a sore throat. Viruses that can cause conjunctivitis include: adenovirus, enterovirus and coxsackie.
It usually occurs in community epidemics (schools, workplace, physician’s office)
It can be transmitted by contaminated fingers, medical instruments, swimming pool water.
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Symptoms of viral conjunctivitis
Unilateral or bilateralRedness(hyperaemia)Watering(epiphora),Itching,Mild mucoid discharge,Mild photophobia,Feeling of discomfort and foreign body
sensation.The infection usually begins in one eye and
involve the other within few days.
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Treatment of Viral Conjunctivitis
Topical antibiotics not necessary because secondary bacterial infection is uncommon
Reassurance that the symptoms may get worse for 3-5d before getting better and persist for 2-3 weeks
Some relief from cold compresses and topical antihistamines/decongestants
Do not use topical corticosteroids due to risk of sight-threatening complications (scarring, corneal melting, perforation), especially if etiology is herpes simplex virus or bacterial keratitis
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Bacterial conjunctivitis
Bacterial conjunctivitis causes the rapid onset of conjunctival redness, swelling of the eyelid, and mucopurulent discharge. Bacterial conjunctivitis due to common pyogenic (pus-producing) bacteria causes marked grittiness/irritation and a stringy, opaque, greyish or yellowish mucopurulent discharge that may cause the lids to stick together, especially after sleep. Severe crusting of the infected eye and the surrounding skin may also occurBacterial meningitis could be acute, hyperacute or chronic.
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Acute Bacterial Conjunctivitis
Presentation: Unilateral or bilateral, red eye, mucopurulent or purulent discharge continuously throughout the day, burning, irritation, mild chemosis
Neonates: symptoms appear 5-14d after birth (inclusion conjunctivitis of the newborn)
Highly contagious: spread by direct contact or by contaminated objects
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Hyperacute Bacterial Conjunctivitis
Etiology: Neisseria species, most commonly N. gonorrhoeae
Presentation: profuse, purulent discharge with rapidly progressive symptoms of marked conjunctival injection, irritation, tenderness to palpation, chemosis, lid swelling, and tender preauricular adenopathy
Ophthalmia neonatorum: gonococcal ocular infection with bilateral discharge 3-5d after birth from vaginal transmission
Sexually active teens: transmitted from genitalia to hands to eyes, commonly see concurrent urethritis
Sight-threatening
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Chronic Bacterial Conjunctivitis
Most common etiology: Staphylococcus species
More common in adults and patients with acne rosacea or facial seborrhea
Presentation varies: redness, itching, burning, foreign-body sensation, flaky debris, blepharitis (common), eyelash loss
Concurrently see styes and chalazia of the lid margin from chronic inflammation of the meibomian glands
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Treatment of Acute Bacterial Conjunctivitis
Topical broad-spectrum antibiotics: erythromycin ointment, bacitracin-polymyxin B ointment (Polysporin), trimethropim-polymyxin B (Polytrim), sulfa drops
Most H. flu and S. pneumoniae resistant to macrolides
Sulfa drops (Bleph-10): less effective and rare side effect of Stevens-Johnson syndrome
Rx: 1/2” ointment inside lower lid or 1-2 drops QID for 5-7 days (response seen typically within 1-2d)
Inclusion Conjunctivitis of the Newborn: treat with 2 week course of erythromycin (50mg/kg/d po divided QID) or sulfisoxazole (150mg/kg/d po divided QID), topical unnecessary with systemic
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Treatment of Hyperacute Bacterial Conjunctivitis
Immediate ophthalmic referral Systemic and topical antibiotics and saline irrigation Systemic antibiotic of choice due to penicillin-resistant
N. gonorrhoeae is single-dose Ceftriaxone (25-50mg/kg IV or IM, not to exceed 125mg) or single-dose Cefotaxime (100mg/kg IV or IM) in neonates
If venereal disease present in teens, also treat with single-dose of azithromycin (1g) because over 30% of these patients will have concurrent chlamydial disease
AAP and CDC recommendations for prevention of ophthalmia neonatorum: silver nitrate 1% aqueous solution (side effect of chemical conjunctivitis), erythromycin 0.5% ophthalmic ointment, tetracycline 1% ophthalmic ointment
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Allergic conjunctivitis
Allergic conjunctivitis is inflammation of the conjunctiva (the membrane covering the white part of the eye) due to allergy. Allergens differ among patients. Symptoms consist of redness (mainly due to vasodilation of the peripheral small blood vessels), oedema (swelling) of the conjunctiva, itching, and increased lacrimation (production of tears). If this is combined with rhinitis, the condition is termed "allergic rhinoconjunctivitis".
The symptoms are due to release of histamine and other active substances by mast cells, which stimulate dilation of blood vessels, irritate nerve endings, and increase secretion of tears.
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Treatment of Allergic Conjunctivitis
Self-limited Allergen avoidance, cold compresses,
topical antihistamines/vasoconstrictors (do not use for greater than 2 weeks), artificial tears, topical NSAIDS (low efficacy)
Prophylaxis: oral antihistamines (onset of action=days), mast cell stabilizers (onset of action=5-14d)
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Glaucoma
This is a disease of progressive optic neuropathy with loss of retinal neurons and their axons (nerve fiber layer) resulting in blindness if left untreated. It may have a classical sign –elevated intraocular pressure
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Types
There are two typesOpen angle glaucoma Closed angle glaucomaCongenital glaucoma
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Congenital GlaucomaCongenital GlaucomaOnset: antenatally to 2 years old
Symptoms Irritability Photophobia Epiphora Poor vision
Signs Elevated IOP Buphthalmos Haab’s striae Corneal clouding Glaucomatous cupping Field loss
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Congenital GlaucomaCongenital Glaucoma
Buphthalmos and cloudy corneas
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Narrow Angle GlaucomaNarrow Angle GlaucomaOnset: 50+ years of age
Symptoms Severe eye/headache pain Blurred vision Red eye Nausea and vomiting Halos around lights Intermittent eye ache at night
Signs Red, teary eye Corneal edema Closed angle Shallow AC Mid-dilated, fixed pupil “Glaucomflecken” Iris atrophy AC inflammation
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Narrow Angle GlaucomaNarrow Angle GlaucomaMid-dilated, fixed pupil
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Open Angle GlaucomaAka: chronic simple glaucoma (CSG)
and primary open angle glaucoma (POAG)
Risk Factors IOP Diabetes Age Myopia Race Gender Family history
Cardiovascular Central corneal disease thickness
Hormones
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Open Angle GlaucomaOpen Angle Glaucoma
Onset: 50+ years of age
Symptoms Usually none May have loss of central and peripheral vision late
Signs Elevated IOP Visual field loss Glaucomatous disk changes
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GLAUCOMAGLAUCOMATreatment
Medical Surgical
Miotics Beta-blockers Carbonic anhydrase inhibitors Prostaglandin analogues Alpha-2 agonists
Argon laser trabeculoplasty Trabeculectomy Filtering procedure Cyclocryotherapy Cyclolaser ablation Iridotomy
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Fever of unkown origin(fuo)
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PUO Definition• Fever Persisting for more than 3 weeks.
• Documented Temp above 101 F Several Occasions.
• Uncertain diagnosis after extensive evaluation in hospital for . 1 week.
• PUO of 2 weeks no diagnosis could be made.
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Pyrexia of Unknown Origin
Causes:
A. Infections.
B. Neoplastic Diseases.
C. Auto Immune Disease.
D. Hentable Diseases.
E. Granulamatous Disease.
F. Drug Fever.
G. Miscellaneous Causes.
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1- Infections: A. Viral Syndrome
1. Cytomegalovirus.2. Epstein-Barr Virus (Mononucleosis)
3. HIV Infection.
B. Lyme Disease
C. Pyelonephritis or Urinary Tract Infection
D. Meningitis.
E. Pneumonia
F. Septicemia
G. Acute Sinusitis
H. Malaria
Causes
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I. Osteomyelitis.
J. Typhoid Fever or Enteric Fever
K. Subacute Bacterial Endocarditis (SBE)
L. Tuberculosis.
M. Liver or Biliary infection.
N. Abdominal or Pelvic abscess
O. Dental Abscess
P. Psittacosis
Q. Brucellosis
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2- Neoplastic Disease:A. Leukemia
B. Lymphoma
C. Sarcoma
D. Carcinomatosis
E. Renal cell carcinoma
F. Colon Cancer
G. Pancreatic
H. Hepatoma
I. Metastic cancer
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3- Autoimmune Disease:A. Juvenile Rheumatoid Arthritis (evanescent rash)
B. Henoch-Schonlein Purpura
C. Systemic Lupus Erythematosus
D. Rheumatic Fever (Migratory Polyarthritis)
E. Polymyalgia Rheumatica
F. Temporal Arteritis
G. Inflammatory Bowel Disease
H. Reiter’s Syndrome
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4- Heritable Disease Causes:A. Fabry’s Disease
B. Familial Mediterranean fever
C. Lamellar Ichthyosis
D. Nephrogenic Diabetes Insipidus
E. Anhydrotic ectodermal dysplasia
F. Familial Dysautonomia
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Drug-Induced Fever
1- Antibiotic Induced Fever:A. Erythromycin
B. Isoniazid
C. Penicillin
D. Nitrofurantoin
E. Procainamide
F. Quinidine
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3- Miscellaneous Medications Inducing Fever:A. Allopurinol
B. Antihistamines
C. Aspirin
D. Cimetidine
E. Heparin
F. Meperidine
G. Phenytoin
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InvestigationsHematology
Urine examination
Chest radiograph
Other tests like liver function test, sputum culture etc