<prompt> The MC organism causing congenital pneumonia is:Group B haemolytic StreptococcusE. coliStaphylococcus aureusSalmonella spp  <response>: Ans. A. Group B haemolytic StreptococcusPneumonia that becomes clinically evident within 24 hours of birth may originate at 3 different times. The 3 categories of congenital pneumonia are as follows: True congenital pneumonia Intrapartum pneumonia Postnatal pneumoniaTrue congenital pneumonia is already established at birth. It may become established long before birth or relatively shortly before birth. Transmission of congenital pneumonia usually occurs via 1 of 3 routes:Hematogenous, Ascending and Aspiration. Group B Streptococcus GBS was the most common bacterial isolate. Other isolates include Nontypable Haemophilus influenzaeOther gram-negative bacilli, Listeria monocytogenes, EnterococciAnd Occasionally, Staphylococcus aureus and rarely, Mycoplasma pneumoniae 