BBV Flashcards

1
Q

What are the different types of HIV?

A

HIV1 and HIV2

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2
Q

What proportion of people are unaware they have HIV?

A

1/4

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3
Q

What proportion of patients infected with Hep B develop a chronic infection?

A

1/20

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4
Q

What proportion of patients infected with Hep C develop a chronic infection?

A

75%

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5
Q

What is the main route of transmission for Hep C?

A

IVDU

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6
Q

When must the BBV screen be carried out?

A

Within 3 months before they plan to provide gametes for use in treatment

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7
Q

What is detected in BBV serology?

A

Anti-HIV1&2; HBsAg, anti-HBc; anti-HCV-ab

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8
Q

What % of HIV +ve women will have hydrosalpinx?

A

40%

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9
Q

What type of infertility is HIV associated with in women?

A

Tubal factor

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10
Q

How may being HIV +ve affect a man’s sperm?

A

Lower motility - likely proportional to CD4 count

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11
Q

How may HAART affect a man’s sperm?

A

Lower count and motility, and greater % of abnormal forms

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12
Q

What are the treatment options of Hep B?

A

12 months of weekly injection of immunomodulator peginterferon alpha-2a, or antiviral e.g. tenofovir or entecavir

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13
Q

How many genotypes of Hep C are there?

A

3

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14
Q

What is the % success of eradication therapy in genotype 1 of Hep C?

A

50%

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15
Q

What is the % success of eradication therapy in genotype 2 of Hep C?

A

80%

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16
Q

Which CURRENT NICE guidelines related to BBV +ve patients and fertility services?

A

1.2, 13.9

17
Q

How may Hep B patients conceive naturally?

A

Immunisation of seronegative partner

18
Q

How may Hep C patients conceive naturally?

A

Post-eradication therapy of seropositive partner

19
Q

What is TUPSI?

A

Used in HIV patients. Patients have Unprotected SI in calculated fertile window while seronegative partner is taking PrEP (usually, occasionally they may decide to do it without PrEP). TUPSI should only be done if VL undetectable for 6months or is taking HAART

20
Q

How often should HIV -ve patients doing TUPSI be tested for HIV?

A

Monthly

21
Q

How often should HIV +ve patients doing TUPSI have their VL tested?

A

Monthly

22
Q

What is an alternative option for HIV +ve when with detectable VL or not on HAART

A

Self-insemination

23
Q

What is the usual VL in semen compared to blood

A

USUALLY 10x less in semen

24
Q

What is the risk of HIV transmission in receptive vaginal intercourse at each exposure?

A

0.1%

25
Q

What is required before a BBV +ve couple can be referred to fertility services?

A

1) GU work-up; 2) HIV parameters; 3) STI screen; 4) Fertility work-up; 5) counselling

26
Q

How do we reduce risk of transmission of BBV’s in ART?

A

Sperm washing

27
Q

How do we reduce risk of transmission of BBV’s in natural conception?

A

HIV = PrEP
Hep B = immunisation
Hep C = eradication therapy in +ve patient

28
Q

How is risk to staff minimised?

A

Immunisation against Hep B

29
Q

How is risk to other patients minimised?

A

Probe wiping; BBV +ve = end of theatre list; separate cryopreservation containers

30
Q

What would be the immunological profile of a patient with acute Hep B?

A
HBsAg = +ve
Anti-HBc = +ve
Anti-HBs = -ve
31
Q

What would be the immunological profile of a patient with chronic Hep B?

A
HBsAg = +ve
Anti-HBc = +ve
Anti-HBs = -ve
OR
HBsAg = -ve
Anti-HBc = +ve
Anti-HBs = -ve
32
Q

What would be the immunological profile of a patient with resolving acute Hep B infection?

A
HBsAg = -ve
Anti-HBc = +ve
Anti-HBs = -ve