Herpes Virus - HSV 1 and HSV 2 Flashcards
Genome?
dsDNA
Reservoir?
Humans
Where does the envelope come from?
Nucleus
Alpha-Herpes includes what viruses?
Herpes Simplex 1 and 2
HSV encodes what enzymes?
DNA-dependent DNA pol
Thymidine Kinase
Clinical presentation of HSV?
Usually asymptomatic
Both can cause oral and genital infections
Two types of oral herpes?
Acute Herpetic gingivostomatitis
Cold Sores/Herpes Labialis
Symptoms of Acute Herpetic gingivostomatitis
Clear lesions, then white-ish ulcers
Covers mouth, pharynx
Discomfort, fever, gingivitis, lymphendectomy, difficulty speaking/eating
What age group usually gets Acute Herpetic gingivostomatitis?
Kids 1-4
What herpes usually causes oral herpes?
HSV-1
Describe cold sores.
Vesicles, Ulceration, Inflammation, Edema
What is herpes keratitis? Which virus usually?
Herpes of the eye, HSV-1
Clinical presentation of herpes keratitis?
Unilateral Red Eye, Pain, Photophobia
Dendritic Corneal Ulcer
Most frequent cause of blindness.
What is herpes whitlow?
Herpes of small wounds of hands/wrist through secretions
Clinical presentation of herpes whitlow?
Pain and Burning, Erythema, Edema, Vesicles, Fever
What is herpes gladitorum?
Clusters of blisters seen on head/neck that are common among contact sports
What is eczema herpeticum?
Rare, pediatric infection at sites of skin damage by eczema/dermatitis
Typical virus to cause genital herpes?
HSV-2
Symptoms of genital herpes?
Small red bumps, blisters, open sores
Pain/Itching
Flu-like symptoms
Typical virus to cause HSV encephalitis?
HSV-1
HSV encephalitis claim to fame?
Most common viral encephalitis
Clinical presentation of HSV encephalitis?
Early - Fever, headache, Nausea
Late - Encephalopathy (lethargy, confusion, delirium)
What part of the brain is typically targeted?
Temporal Lobes
What is seen in CSF on HSV encephalitis
Elevated Proteins, WBC
Low Glucose
RBC from hemorhage
Most common viral cause of HSV meningitis?
HSV-2
HSV Meningitis is often a complication of…
genital herpes
Most common viral source of neonatal herpes?
HSV-2
How is neonatal herpes transferred?
During delivery through infected maternal genital tract
Transplacental
Hospital Acquired
Post-birth neonatal herpes symptoms?
Usually on skin, eyes, mouth
Encephalitis is common
Pre-birth neonatal herpes symptoms?
Premature birth, low birth-weight
Microcephaly, hydrocephalus, chorioretinitis
Easy way to guess which HSV it is?
HSV-1 = above the waist HSV-2 = Below the waist
Pathogenesis?
Establishes latent infection in sensory ganglia
Upon reactivation, spreads out from ganglion to make lesions
What is cowdry type A?
Intranuclear eosinophilic amorphous
droplet like bodies surrounded by clear halo
Virus is transmitted through…
Saliva, vaginal secretions, lesion fluids
Control of Herpes?
Cyclovirs
Arabinoside
Iododeoxyuridine
Trifluridine