PAEDS: CAUSATIVE ORGANISMS

Question 1

Causative organism of chickenpox?

Answer 1

Varicella zoster virus

Question 2

Causative organism of whooping cough

Answer 2

Bordatella pertussis

Question 3

Causative organism of scarlet fever

Answer 3

Group A streptococci - usually strep pyogenes

Question 4

Causative organism of hand, foot & mouth disease

Answer 4

Intestinal viruses of the picornaviridae family - coxsackie A16 and enterovirus 71

Question 5

Causative organism of erythema infectiosum/slapped cheek syndrome

Answer 5

Parvovirus B19

Question 6

Causative organism of roseola infantum

Answer 6

Human herpes virus 6 (known as exanthem subitum or sixth disease)

Question 7

Causative organism of croup

Answer 7

Parainfluenza viruses

Question 8

Causative organism of bronchiolitis

Answer 8

Respiratory syncytial virus

Question 9

Causative organism of acute epiglottitis

Answer 9

Haemophilus influenza type B

Question 10

Causative organism of pharyngitis/strep throat

Answer 10

Group A beta haemolytic strep - strep pyogenes

Question 11

Most common causative organism of viral conjunctivitis

Answer 11

Adenovirus mostly

Question 12

Most common Causative organism of otitis media

Answer 12

Strep pneumoniae, haemophilus influenza and moraxella catarrhalis

Question 13

Causative organism of impetigo

Answer 13

Staph aureus or strep pyogenes

Question 14

Causative organism of molluscum contagiosum

Answer 14

Molluscum contagiosum virus, a member of the poxviridae family

Question 15

Causative organism of scabies

Answer 15

Sarcoptes scabies

Question 16

Causative organism of glandular fever

Answer 16

EBV (aka human herpes virus 4)

Question 17

Causative organism of threadworms

Answer 17

Enterobius vermicularis (pinworms)

Question 18

Causative organism of head lice

Answer 18

Pediculus capitis

Question 19

Most common causative organism of viral-induced wheeze

Answer 19

Rhinovirus
RSV

Question 20

Most common causative organism of pneumonia

Answer 20

Strep pneumoniae

Question 21

Most common Causative organism of UTIs

Answer 21

E.coli

(Others: proteus and pseudomonas)

Question 22

Most common Causative organism of early onset and late onset neonatal sepsis

Answer 22

Early onset sepsis: GBS (75%) and E.coli
Late onset - coagulate-negative staph e.g. staph (others: epidermidis, pseudomonas eruginosa, klebsiella, enterobacter and fungal)

Question 23

Most common causative organisms of paediatric encephalitis in children and in neonates

Answer 23

HSV-1 in children from cold sores
HSV-2 in neonates from genital herpes

Question 24

Common causative organisms of meningitis in 0-3 months?

Answer 24

GBS
E.coli
Listeria monocytogenes

Question 25

Most common Causative organism of septic arthritis

Answer 25

Staph aureus (Consider neisseria gonorrhoea in sexually active teenagers)

Question 26

Most common Causative organism of osteomyelitis

Answer 26

Staph aureus

Question 27

Causative organism of eczema herpeticum

Answer 27

Herpes simplex virus 1 or 2

Question 28

What is the most common cause of erythema multiforme?

Answer 28

Herpes simplex virus

Question 29

Causative organism of pityriasis rosea

Answer 29

Herpes hominis virus 7

Question 30

Most common causative organism of Tinea capitis? What can cause it that comes from pets?

Answer 30

Trichophyton tonsurans (Microsporum canis can be acquired from cats or dogs)

Question 31

Most common bacterial cause of conjunctivits?

Answer 31

Streptococcus pneumoniae, Staphylococcus aureus and Haemophilus influenzae.

Question 32

What can cause ophthalmia neonatorum?

Answer 32

Chlamydia trachomatis and neisseria gonorrhoea

Question 33

Common causative organisms of meningitis in 3 months-6 years?

Answer 33

Neisseria meningitidis Strep pneumoniae H.influenzae

Question 34

Common causative organisms of meningitis in>6 year olds?

Answer 34

Neisseria meningiditis Strep pneumoniae

Question 35

Casualties organism of pityriasis versicolour?

Answer 35

Malassezia furfur

Question 36

Most common causative organism of Tinea corporis (ringworm)?

Answer 36

Trichophyton rubrum and Trichophyton verrucosum