<prompt> The organism causing Early-onset neonatal septicemiaStreptococcus agalactiaeStreptococcus bovisStreptococcus pyogenesStreptococcus viridans  <response>: Early-onset sepsisless than 72 hrs is caused by organisms prevalent in the maternal genital tract or in the delivery area. The microorganisms most commonly associated with early-onset infection include the following: Group B Streptococcus GBS- Streptococcus agalactiae, Escherichia coli, Coagulase-negative Staphylococcus, Haemophilus influenzae, Listeria monocytogenes.Late-onset sepsis72hrs or later is caused by organisms thriving in the external environment of the home or the hospital. Organisms that have been implicated in causing late-onset sepsis include the following: Coagulase-negative Staphylococcus, Staphylococcus aureus, E coli, Klebsiella, Pseudomonas, Enterobacter, Candida, GBS, Serratia, Acinetobacter, Anaerobes 