11. Infections 3: Viral, Venereal, Inflammation and Unknown Flashcards
Enveloped viruses induce what types of hypersensitivity?
4 - cell mediated
3 - antibody mediated
Non-enveloped viruses induce what type of hypersensitivity?
3 - antibody production
What type of viruses are retro viruses?
Enveloped
How do viruses replicate?
Use the transcriptase enzyme to replicate the host’s DNA from its RNA
What characterizes category A HIV/AIDS CD4 + Lymphocyte?
CD4 > 500
Persistent generalized lymphadenopathy
What characterizes category B HIV/AIDS CD4 + Lymphocyte?
CD4 200-500
Oropharngeal candida
Hairy leukoplakia (oral)
What characterizes category C HIV/AIDS CD4 + Lymphocyte?
CD4 <200 CMV retinitis Kaposi's sarcoma Lymphoma Pneumocystis carnii
What are the ocular signs and symptoms of HIV/AIDS?
HIV related vasculopathy
- Conj vascular sludging
- CWS
- Intra-retinal hemes
How is CMV retinits described?
Brush fire
What is PORN?
Outer retinal necrosis leading to full thickness tissue necrosis with minimal or no vitritis
Who gets PORN?
Immunodeficient patients
What does the vitreous look like in PORN?
Clear
What typifies acute retinal necrosis syndrome (ARN)?
Orbital pain and decreased VA
Vitritis
Healthy patients
What do the histological lesions from CMV look like?
Classic Owl’s eye
What are the ocular signs/symptoms of active CMV?
Necrotizing retinits
Smouldering borders
What is has less severe retinal disease in CMV, acquired or congenital?
Congenital
What are the common signs associated with congenital HSV?
*Microcephaly
Skin vesicles
Intra-uterine growth retardation
What are the ocular signs and symptoms of congenital HSV?
Posterior lenticular opacification
Microphthalmia
Microcornea
What are the common ocular signs/symptoms of neonatal HSV?
*Periocular skin disease
Vit inflammation
What are the signs/symptoms of primary HSV?
Acute follicular conjunctivitis
Initial episode of the superficial cornea that then affects the eyelid or conjunctiva
What type of keratitis may occur in recurrent HSV?
Necrotizing stromal keratitis (neurotrophic)
How is Mumps spread?
Airborne respiratory droplets
What are the systemic signs/symptoms of mumps?
Hearing loss
CN palsy
Guillain-Barre syndrome
What are the ocular signs/symptoms of mumps?
Acute dacryoadenitis Conjunctivitis, episcleritis, scleritis Disciform stromal keratitis Uveitis Retina: AMPPE, choroiditis Neuritis
What labs can be done for mumps?
ELISA
What 3 viruses can cause disciform keratitis?
Herpes zoster
Mumps
Varicella
What are the systemic signs/symptoms of congenital rubella?
Bilateral hearing loss
Mental retardataion
Meningitis
Dental hypoplasia
What are the ocular signs/symptoms of congenital rubella?
Microphthalmia Glaucoma Keratoconus Spherophakia Angle dysgenesis Salt and pepper fundus
What characterizes rubeola (Measles)?
Fever/cough
Kplik’s spots on conj mucosa (and other mucosa)
Maculopapular rash
What ocular complication can be seen in measles?
Retinitis
Posterior uveitis
Chlamydia can cause what respiratory infection in adults?
Pneumonia
How is chlamydia transmitted?
Birds