218-part 2

Question 1

rate of spread of STI can be mathematically calculated by

Answer 1

efficiency of transmission x rate of partner exchange x duration of infectiousness

Question 2

how many new std cases each year and how much does it cost

Answer 2

19 million cases, $17 billion

Question 3

Three things to consider for biology of sexual transmission

Answer 3

status of the mucosal surface, the viral inoculum, and target cells

Question 4

Important biological factors of transmission for infected donor

Answer 4

pathogen load (stage of illness), presence of another STD, viral phenotype

Question 5

important biological factors of transmission for the uninfected recipient

Answer 5

presence of an STD, genetic susceptibility, integrity of epithelium, target cells, mucosal immune response

Question 6

why are men more likely to give HIV

Answer 6

higher concentration of HIV in semen than vaginal secretions

Question 7

why does having another STD increase your risk for HIV

Answer 7

it increases the number of target cells (langerhans dndritic macrophages) in the genital region

Question 8

three main consequences of PID

Answer 8

infertility (20%), chronic pain (18%), ectopic pregnancy (9%)

Question 9

three std’s that can give you cancer

Answer 9

hpv, hep b, HIV

Question 10

when is transplacental transmission of STDs most common

Answer 10

when STD is acquired later in pregnancy

Question 11

Can stds be transmitted in breast feeding

Answer 11

yes