HSV Flashcards
(34 cards)
Types of Herpes Viruses
HHV-1: HSV-1-Herpes simplex virus type 1 HHV-2: HSV-2-Herpes simplex virus type 2 HHV-3: VZV-Varicella zoster virus HHV-4: EBV-Epstein Barr virus HHV-5: CMV-Cytomegalovirus HHV-6: Sixth disease/Roseola HHV-7: Roseola HHV-8: KSHV-Kaposi sarcoma-associated herpesvirus
HHV-1/HSV1 Cells of Latency
Sensory Ganglia
HHV-2/HSV2 Cells of Latency
Sensory Ganglia
HHV-3/VZV: Cells of Latency
Sensory ganglia (dorsal root ganglia)
HHV-4/EBV: Cells of Latency
B-Lymphocytes
HHV-5/CMV Cells of Latency
Myeloid cells, salivary gland cells, endothelium
HHV-6 Cells of Latency
CD4+ T-Lymphocytes
HHV-7 Cells of Latency
CD4+ T-Lymphocytes
HHV-8 Cells of Latency
B-lymphocytes (latency), endothelial cells (Kaposi sarcoma)
Primary Infection of Herpes
Acute (primary) herpetic gingivostomatitis
Recurrent Infection of Herpes
Herpes labialis
Intra-oral herpes
HSV-pathogenesis-Primary Infection
- Usually young age
- Often asymptomatic
- Symptomatic=Primary herpetic gingivostomatitis
- In adults is usually pharyngotonsillitis
- Spread through infected saliva or active lesions
- Incubation period=3-9 days
Primary Herpetic Gingivostomatitis Clinical Features
- Cervical lymphadenopathy
- Chills
- Fever
- Nausea
- Anorexia
- Irritability
- Sores in mouth
Primary Herpetic Gingivostomatitis Oral Lesions
- Ulcerations on fixed and movable mucosa
- Variable number of lesions
- Ulcers coalesce and form larger irregular ulcerations
- Gingiva enlarged and painful
- Resolution in 5-7 days (latency in trigeminal ganglion)
HSV- diagnosis
Clinical** Culture (may take 2 weeks) Tissue biopsy Cytologic smear (less invasive)** Serologic testing
HSV-Histopathology
Molding
Margination
Multinucleation
Also Tzanck cells
Lab Results
Positive IgM and Negative IgG = Acute/Recent Infection
Negative IgM and positive IgG = established infection
Treatment primary HSV
- Supportive/Palliative Treatment
- Fluids, nutrition, rest, avoid spreading to others
- Avoid touching eyes, genitals
- Possible referral to MD if infant is not drinking because of pain
**ACYCLOVIR NOT RECOMMENEDED ANYMORE
Medications:
- Topical anesthetic (OTC vs Rx)
- Mucosal coating (OTC)
- Analgesic (OTC vs Rx)
- Antiviral (Rx) (for immunocompromised or dehydrated pts)
Warning about Primary HSV Meds
Rinses may diminish the gag reflex therefore better suited for older patients, but remember serious side-effects of seizures and methemoglobinemia in pediatric population.
HSV-1 Recurrent infection
Secondary herpes Mild, self-limiting Latency in trigeminal ganglion Vermilion border Intraorally on fixed keratinized mucosa Prodrome> papules > vesicles > ulcer > crust > heals > no scar 7-10 days Unilateral
Recurrent HSV-Triggers
Old age UV light Physical/emotional stress Fatigue Heat Cold Pregnancy Allergy Trauma Dental treatment Respiratory illnesses Fever Menstruation Systemic Diseases Malignancy
Can you give someone Herpes if you’re asymptomatic?
Asymptomatic shedding can occur in seropositive patients
More common after surgical procedures and in immunocompromised patients
Universal precautions
What is the difference clinically between Recurrent HSV infection and Primary?
Intraoral colescing lesions are NOT ON MOVABLE MUCOSA FOR RECURRENT!! (palate and keratinized gingiva)
Recurrent HSV-Treatment
- Depends on severity/frequency
- Preventive/suppressive vs episodic/abortive strategies
- Antiviral agents/antiviral-steroid combination agents
- Remove precipitating factors