• Infectious Diseases p52-p62.

1. Urinary Tract Infection (uti).

***) The commonest causes of urinary tract infections are:

1. Proteus species

2. Escherichia coli

3. Klebsiella

4. Pseudomonas

5. Citrobacter species

Answer: B* Escherichia coli

***) A 3 year old boy presents to you with recurrent urinary tract infection. Renal ultrasound was normal. Your next step of investigation would be:

Intravenous urogram

Isotope scan

No need for further investigations

Voiding cystourethrogram

Cystoscopy

Answer: D* Voiding cystourethrogram

???) The major organic cause of recurrent abdominal pain in children is:

Peptic ulcer

Urinary tract infection

Meckel's diverticulitis

Megacolon

Regional enteritis

Answer: 2* Urinary tract infection

???) The definitive test for urinary tract infection in a 10 years old girl is:

IVP

MCU (Micturating cystouretherogram)

CBC

Urine routine analysis

Urine culture with significant bacteriuria

Answer: 5* Urine culture with significant bacteriuria

2. Streptococcal Pharyngitis.

???) Which one of the following conditions needs treatment:

Erythema toxicum of the newborn

Withdrawal vaginal bleeding at third day of life

Mongolian spots

Mastitis neonatorum

Impetigo neonatorum

Answer: 5* Impetigo neonatorum

***) Concerning impetigo all of the following are true, except:

Is highly contagious

The drug of choice in children is tetracycline

Is usually caused by a staphylococcal infection

In an infant may be complicated by generalized exfoliation

It effects mainly the nostrils and perioral areas

Answer: 2* The drug of choice in children is tetracycline

3. Scarlet Fever.

???) All of the following about rash are true, except:

In measles the rash is a maculopapular, begins on the head and spread downwards

In scarlet fever the rash is vesicular and petechial

In erythema infectiosum the rash begins as a marked erythema of the cheeks

In varicella rash is polymorphic, but mainly vesicular

In rubella the rash is maculopapular, associated with postauricular and suboccipital lymphadenopathy

Answer: 2* In scarlet fever the rash is vesicular and petechial

4. Rheumatic Fever.

???) Which one of the following is not a collagen disease in children:

Rheumatic fever

Sclerema

Rheumatoid arthritis

SLE (systemic lupus erythematodes)

Dermatomyositis

Answer: 1* Rheumatic fever

???) ??? One of the following is the pathognomonic rash of rheumatic fever:

Erythema multiforme of the limbs

Erythema nodosum of the back

Erythema nodosum of the trunk

Purpura on the lateral aspect of buttocks

Purpura on the lower extremities

Answer: 1* Erythema multiforme of the limbs

5. Infectious Mononucleosis.

***) All of the following are true about infectious mononucleosis, except:

Generalized lymphadenopathy

Splenomegaly in 50% of cases

The drug of choice in children is chloramphenicol

The classic picture is rarely seen in the blood film

Atypical lymphocytes are usually seen in the blood film

Answer: C* The drug of choice in children is chloramphenicol

***) The lymph node enlargement in infectious mononucleosis most commonly involve:

Cervical group

Occipital nodes

Axillary group

Epitrochlear group

Inguinal group

Answer: 1* Cervical group

***) In infectious mononucleosis all are true, except:

Hepatomegaly may present

Lymphadenopathy is presenting sign

Skin rash (maculopapular) may present

Aacyclovir is an effective therapy

The incubation period is 25-50 days

Answer: 44444445* The incubation period is 25-50 days