Perinatal transmission of bloodborne infections: Difference between revisions

Latest revision as of 15:28, 18 September 2020

Main risk is for HIV and HBV

Investigations

Unknown maternal serostatus

If possible, send STAT maternal HIV serology, HBV, HCV, and syphilis; can consider viral load
For infant:
- At birth send HIV, HBV (sAg, sAb, cAb), HCV-Ab, and syphilis serologies, as well as an HIV PCR (not viral load)
- Repeat HIV PCR at 1, 2, and 4-6 months

HIV

Risk of transmission from an untreated HIV-positive mother is approximately 25%, but less than 1% if treated

Viral Load	Management of Mother			Management of Infant
Viral Load	ART	Zidovudine	C-section	Management of Infant
<40	yes	yes	no	zidovudine for 4 to 6 weeks
40-999	yes	yes	consider	combination ART, or zidovudine monotherapy for 4-6 weeks
≥1000	yes	yes	yes	combination ART
unknown	yes	yes	yes	combination ART, adjusted based on results of maternal viral load

Management of Mother

See HIV in pregnancy for information about managing the mother ante-, intra-, and postpartum
Mothers should be treated with antiretroviral therapy and monitored during pregnancy
Intrapartum management is based on viral load, and includes continuing antiretrovirals, giving intravenous zidovudine during labour, and consideration of Cesarean section
Following delivery, mothers should be counselled about the risks of breastfeeding

Management of Neonate

See prevention of neonatal HIV for information about preventing disease in the newborn
An HIV PCR should be obtained within 48 hours of delivery, then regularly following delivery
- If any single HIV PCR test is positive, then they are diagnosed with HIV and need ongoing treatment
A decision to treat the infant with either zidovudine monotherapy for 4 to 6 weeks, or presumptive antiretroviral therapy for at least 6 weeks, depends on the risk of infection

@@ Line 1: / Line 1: @@
-* Also see article on [[neonatal HBV]]
+*Main risk is for [[HIV]] and [[HBV]]
-== Diagnosis ==
+==Investigations==
+=====Unknown maternal serostatus=====
-* Up to 18 months of age, only use '''HIV PCR'''
-** In general, all infants with perinatal exposure should be checked at 14 to 21 days, 1 to 2 months, and 4 to 6 months
-** If high risk, can also check at birth and 2 to 4 weeks after stopping antiretrovirals
-** Confirm a positive result with repeat testing
-* '''Serology''' can be tested starting at 18 to 24 months
+*If possible, send STAT maternal HIV serology, HBV, HCV, and syphilis; can consider viral load
-== Management ==
+*For infant:
-=== Preventative management ===
+**At birth send HIV, HBV (sAg, sAb, cAb), HCV-Ab, and syphilis serologies, as well as an HIV PCR (''not'' viral load)
-* Immediate management depends on maternal viral load and treatment status
+**Repeat HIV PCR at 1, 2, and 4-6 months
-* In general, a mom with HIV should get IV zidovudine during labour
+==HIV==
+*Risk of transmission from an untreated HIV-positive mother is approximately 25%, but less than 1% if treated
 {| class="wikitable"
+! rowspan="2" |Viral Load
-! VL      !! Antenatal Rx !! C-section !! Neonatal Rx
+! colspan="3" |Management of Mother
+! rowspan="2" |Management of Infant
 |-
+![[HIV treatment|ART]]
-| >1000   || Any          || Yes       || ART
+![[Zidovudine]]
+![[Cesarean section|C-section]]
 |-
+|<40
-| 40-999  || None         || Yes       || ART
+|yes
+|yes
+|no
+|[[zidovudine]] for 4 to 6 weeks
 |-
+|40-999
-| 40-999  || ART          || Maybe     || ART
+|yes
+|yes
+|consider
+|combination ART, or [[zidovudine]] monotherapy for 4-6 weeks
 |-
+|≥1000
-| <40     || None         || Maybe     || ART
+|yes
+|yes
+|yes
+|combination ART
 |-
+|unknown
-| <40     || ART          || No        || [[Zidovudine]] x4 weeks
-|-
+|yes
+|yes
-| Unknown || None         || Maybe     || ART
-|-
+|yes
+|combination ART, adjusted based on results of maternal viral load
-| Unknown || ART          || Maybe     || Unclear
 |}
-==== Unknown maternal serostatus ====
+=== Management of Mother ===
-* If possible, send STAT maternal HIV serology, HBV, HCV, and syphilis; can consider viral load
-* For infant:
-** At birth send HIV, HBV (sAg, sAb, cAb), HCV-Ab, and syphilis serologies, as well as an HIV PCR (''not'' viral load)
-** Repeat HIV PCR at 1, 2, and 4-6 months
+* See [[HIV in pregnancy]] for information about managing the mother ante-, intra-, and postpartum
-==== Post-exposure follow-up ====
+* Mothers should be treated with antiretroviral therapy and monitored during pregnancy
-{| class="wikitable"
+* Intrapartum management is based on viral load, and includes continuing antiretrovirals, giving intravenous [[zidovudine]] during labour, and consideration of [[Cesarean section]]
-! Age      !! Investigations   !! Management
+* Following delivery, mothers should be counselled about the risks of breastfeeding
-|-
-| Birth    || CBC/diff, ALT, lactate, and HIV PCR || Start ART as described below
+=== Management of Neonate ===
-|-
-| 7 days   || CBC/diff, nevirapine level || Dose-adjust nevirapine if needed
+* See [[Neonatal HIV#Prevention|prevention of neonatal HIV]] for information about preventing disease in the newborn
-|-
+* An HIV PCR should be obtained within 48 hours of delivery, then regularly following delivery
-| 14 days  || CBC/diff, nevirapine level, and HIV PCR || Dose-adjust nevirapine if needed
+** If any single HIV PCR test is positive, then they are diagnosed with HIV and need ongoing treatment
-|-
+* A decision to treat the infant with either [[zidovudine]] monotherapy for 4 to 6 weeks, or presumptive antiretroviral therapy for at least 6 weeks, depends on the risk of infection
-| 4 weeks  || CBC/diff and ALT; ?HIV PCR? || Stop nevirapine if prior HIV PCR is negative, and continue other ART
-|-
+==Hepatitis B virus==
-| 6 weeks  || ?HIV PCR? || Stop zidovudine and lamivudine if HIV PCR has been negative
-|-
+*[[Hepatitis B in pregnancy#Management|Management of the mother]]
-| 2 months || || Review as needed
+*[[Neonatal HBV#Prevention|Management of the neonate]]
-|-
-| 6 months || CBC/diff and ALT ||
+==Hepatitis C virus==
-|-
-| 18 months || HIV serology || Developmental assessment
+*[[Hepatitis C virus#Management|Management of the mother]]
-|-
+*[[Neonatal HCV|Management of the neonate]]
-| 3.5 years || || Developmental assessment
-|-
-| 5.5 years || || Developmental assessment
-|}
+==Further Reading==
-=== Selection of antiretrovirals ===
-* Can either do a prophylactic regimen, or treat empirically
-* Prophylaxis:
-** ZDV/NVP: [[Zidovudine#Neonatal HIV prophylaxis|zidovudine]] x6 weeks, plus [[nevirapine#Neonatal HIV prophylaxis|nevirapine]] x3 in the first week of life
-* Empiric treatment:
-** ZDV/3TC/NVP: [[Zidovudine#Neonatal HIV prophylaxis|zidovudine]] fir 6 weeks, plus [[lamivudine#Neonatal HIV prophylaxis|lamivudine]] and [[nevirapine#Neonatal HIV prophylaxis|nevirapine]] for 2 to 6 weeks
-** ZDV/3TC/RAL: [[Zidovudine#Neonatal HIV prophylaxis|zidovudine]] for 6 weeks, plus [[lamivudine#Neonatal HIV prophylaxis|lamivudine]] and [[raltegravir#Neonatal HIV prophylaxis|raltegravir]] for 2 to 6 weeks
+*AIDSinfo. [https://aidsinfo.nih.gov/guidelines/html/3/perinatal/187/antiretroviral-management-of-newborns-with-perinatal-hiv-exposure-or-perinatal-hiv Recommendations for the Use of Antiretroviral Drugs in Pregnant Women with HIV Infection and Interventions to Reduce Perinatal HIV Transmission in the United States].
-== Further Reading ==
+*Ontario HIV Treatment Network. [http://www.ohtn.on.ca/mother-to-child/ Guidelines for the Prevention of Mother-to-Child HIV Transmission]. 2017.
-* AIDSinfo. [https://aidsinfo.nih.gov/guidelines/html/3/perinatal/187/antiretroviral-management-of-newborns-with-perinatal-hiv-exposure-or-perinatal-hiv Recommendations for the Use of Antiretroviral Drugs in Pregnant Women with HIV Infection and Interventions to Reduce Perinatal HIV Transmission in the United States].
 [[Category:HIV]]