IC18 Flashcards
Notification of STIs should be done within _____ of diagnosis
72h
Notification of STIs (excluding HIV/AIDS) is not meant for ______
case detection or contact tracing
Only demographic data (_______) for epidemiologic analysis is required
age, gender, ethnicity, nationality
________ is mandatory in HIV/AIDS
Partner notification
Which STI could spread during pregnancy to the child?
HIV, syphilis
Which STI could spread from mother to child during childbirth?
Chlamydia, gonorrhea, HSV
Which STI could spread from mother to child during breastfeeding?
HIV
Characteristic of Neisseria gonorhheae
intracellular gram- negative diplococci
Bacteria causing chlamydial infection
Chlamydia trachomatis
Bacteria causing syphilis
Treponema pallidum
What does treponemal test detect?
Treponemal antibody
Can treponemal test be used for monitoring?
No, as treponemal antibody be remain active for life
Frequency of Monitoring of VDRL/ RCR after syphilis therapy
3,6,12,18,24 OR 6,12,24 months
Monitoring for Neurosyphilis
CSF examination every 6 month until CSF normal
Virus causing genital herpes
Herpes simplex virus (HSV-1 & HSV-2)
Most recurrent genital herpes are caused by _____
HSV-2
Mode of transmission for herpes
transfer of body fluids and intimate skin- to-skin contact
5 stages in HSV infection
- Primary mucocutaneous infection,
- infection of the nerve ganglia,
- establishment of latency,
- reactivation, and
- recurrent outbreaks/flairs
Benefits of acyclovir and valacyclovir
Reduce viral shedding, duration of symptoms & time to healing
Does antiviral tx for HSV prevent latency or affect frequency and severity of recurrent disease after drug is discontinued?
No
MOA for acyclovir
inhibits viral DNA polymerase → inhibits DNA synthesis and replication.
Valacyclovir is an ____ of acyclovir
L-valine ester
Valacyclovir is rapidly and almost completely converted in man to _______.
acyclovir and valine
For HIV, which population is mandated to be tested for HIV?
Pregnant women
How does HIV enter CD4 cell?
Binds to CD4 receptor & one of the coreceptors CCR5 or CXCR4
Definition of adequate CD4 response
increase in CD4 count in the range of 50 to 150 cells/mm3 during the first year of therapy
Which NRTI can cause bone marrow suppression thus need to monitor FBC?
Zidovudine
All NRTIs need to be adjusted in renal impairment except ____
abacavir
Which NRTI could incr osteoporosis risk?
Tenofovir
What is rilpivirine contraindicated with?
PPIs (oral absorption is reduced with increased gastric pH)
What is rilpivirine contraindicated with?
PPIs (oral absorption is reduced with increased gastric pH)
What is Atazanavir contraindicated with?
PPIs
Definition of AIDS
CD4 < 200 / mm3
Impact of bictegravir/ dolutegravir on SCr?
Increase as it blocks creatine secretion
ADR for raltegravir
Pyrexia, rhabdomyolysis (incr creatine kinase)
Examples of PK enhancers
ritonavir / cobicistat
(also cyp3A4 inhibitors)
Which protease inhibitor is a sulfonamide hence has concern for SJS?
Darunavir
Additional SE for ritonavir
Paresthesia (numbness of extremities), taste perversion
What is Atazanavir contraindicated with?
PPIs
Name 2 NNRTIs
Efavirenz, rilpivirine
Which class do raltegravir, dolutegravir and bictegravir belong to?
INSTI
ADR for efavirenz
Neuropsychiatric SE
Adverse effect related to mitochondrial toxicity
Lactic acidosis and hepatic steatosis, lipoatrophy
Example of fusion inhibitor
Enfuvirtide
ADR for enfuvirtide
Injection site reaction
Example of CCR5 antagonist
Maraviroc
Test to do before initiating a CCR5 antagonist
co-receptor tropism assay
Prodromal symptoms for HSV
mild burning, itching, or tingling
Clinical presentation for HSV
- classical painful multiple vesicular or ulcerative lesions
- Also local itching, pain, tender inguinal lymphadenopathy
Presence of HSV-2 antibody implies _______ infection
anogenital infection
Two types of nontreponemal test
- Venereal Disease Research Laboratory (VDRL) slide test
- Rapid plasma reagin (RPR) card test
Counselling for acyclovir (HSV)
Take without regards to food, after food if GI upset. SE: Malaise, headache, nausea, vomiting, diarrhoea. Maintain adequate hydration to prevent crystallisation in renal tubules
Counselling for valacyclovir (HSV)
Take without regards to food, after food if GI upset. SE: headache. Maintain adequate hydration to prevent crystallisation in renal tubules