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HIV PEP:
Stop HIV within 72 hours of sex
HIV Testing:
20 min result, 28 days after sex
STD Testing:
Full & comprehensive

HIV Western Blot Test, Singapore - Shim Clinic

The HIV western blot test is used to confirm a HIV infection. It is performed after a positive HIV screening test.

Varying Criteria for a Positive HIV Western Blot

AFRICA AUSTRALIA UNITED KINGDOM USA CDC 1 USA CDC 2 USA FDA USA RED CROSS
ENV gene p160
p120
p41
ANY
TWO
ONE
OR
MORE
ONE
OR
MORE
p120/
p160*
AND
p41
p120/
p160*
OR
p41
ONE
OR
MORE
ONE
OR
MORE
ENV gene p68
p53
p32
O
P
T
I
O
N
A
L
ANY
THREE
p31** p32 ANY
ONE
GAG gene p55
p40
p24
p24 p24 p24 ANY
ONE

* The CDC regards p120 and p160 as a single unit—if antibodies to one show up, the others are automatically considered to be present
** Used instead of p32 in the United Kingdom

References


Related Concepts

Sexual risk (of HIV/STD/pregnancy), and what you can do before and after exposure.

Timeline HIV STD Pregnancy
Before exposure
Abstain from sex, Be faithful, or Condom use
Circumcision (males only)
Contraception
(females only)
HIV PrEP (pre-exposure prophylaxis)
– Stop HIV infection before exposure
STD vaccine:
Hepatitis vaccine
HPV vaccine
STD / HIV exposure
Unsafe sex / unprotected sex:
No condom / Condom broke / Condom slip
0-72 hours HIV PEP (post-exposure prophylaxis)
– Stop HIV infection after exposure
STD testing *
Screening test
– to look for asymptomatic infections
– from previous exposures
Emergency contraception
with the
morning-after pill
(females only)
2 weeks HIV DNA Test
1 month HIV 4th Generation Test
SD Bioline HIV Ag/Ab Combo
– Fingerprick blood sampling.
20 minutes to results
3 months HIV 3rd Generation Test
OraQuick® HIV-1/2 Antibody
– Oral fluid or
– Fingerprick blood sampling.
20 minutes to results
STD testing *
– Full & comprehensive
diagnostic test
– to look for current infections
Watch for HIV Symptoms STD Symptoms
If infected HIV Treatment STD Treatment Abortion

* Males: Do not urinate for at least 4 hours before arriving.
* Females: testing is more accurate when you are not menstruating.


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