parasi.

Question 1

which of the following methods used for screening for syphilis?

Answer 1

prozone phenomenon

Question 2

what is the lab diagnosis of congenital syphilis?

Answer 2

1- by using VDRL test => infant will have a higher titer of Abs than the mother
- to differentiate btw. false +ve or true +ve by the persistence of Abs with time because he might take the Abs from mother but with time will disappear.
infants whos mother has syphilis should be treated

Question 3

imp points regarding Haemophilus ducreyi

Answer 3

1- painful ulcer
2- bubo (local lymphadenitis)
3- diagnosis by pus aspirated from L.N or isolated H.ducreyi from ulcer
4- require chocolate agar with factor X

Question 4

what is the reservoir in chlamydia trachomatis?

Answer 4

Asymptomatic genital infection

Question 5

what is the lab diagnosis of chlamydia trachomatis?

Answer 5

1- Giemsa stain or immunofluorescence => inclusion bodies
2- ELIZA => exudate (eye, RT, or GT) or urine
3- culture using cycloheximide
4- staining with iodine => visualize glycogen which is present only in C.trachomatis, not other chlamydia

Question 6

which of the following types of antibodies responsible for defense against N.gonococcus?

Answer 6

IgA and IgG

Question 7

which of the following types of antibodies responsible for defense against N.gonococcus?

Answer 7

IgA and IgG

Question 8

what are the types of people who at risk of gonococcal infection?

Answer 8

people with a deficiency in late-acting complement component 6-9
PREGNANT , MENESES

Question 9

which of the following the term used in infants affected with N.gonorrhea by disseminated infection?

Answer 9

ophthalmia neonatorum

Question 10

what is the lab test of N.gonorrhea?

Answer 10

1- men: PMNs finding the organism inside
2- women: a culture of gram satin but gram stain can be falsely +ve due to normal flora and inability to see a small number
3- “Thayer martin medium” : chocolate agar + antibiotic.
4- culture without antibiotic in case of specimens from sterile sites as blood and joints
5- oxidase +ve, maltose -ve

Question 11

what is the lab test of N.gonorrhea?

Answer 11

1- men: PMNs finding the organism insode
2- women: culture of gram satin but gram stian cn be falsly +ve due to normal flora and inability to see small number
3- “thayer martin medium” : chocolate agar + antibiotic.
4- oxidase +ve, maltose -ve
5- culture without antiobiotic in case of specement from sterlile sites as blood and joits

Question 12

where do the transcription and translation occur in rubella?

Answer 12

in the nucleus

Question 13

where do the replication and assembly occur in rubella?

Answer 13

in the cytoplasm

Question 14

how does L.monocytogens transmitted?

Answer 14

undercooked meat
unpaustraized milk 
raw vegetables 
contact with animal or their feces 
transplacentally

Question 15

how does rubella transmitted?

Answer 15

respiratory droplets

transplacentally

Question 16

lab diagnosis of rubella?

Answer 16

1- cell culture but it produces
a little cytopathic effect (CPE).
2- X4 rise in IgG antibody titer between acute-phase and convalescent-phase sera in the hemagglutination inhibition test or ELISA.
3- the presence of IgM antibody in a single acute-
phase serum sample
4- PCR
5- pregnant women, fetus 
6- amniocentesis

Question 17

which of the following tests used for the diagnosis of congenital syphilis?

Answer 17

VDRL