A full-term 6-day-old neonate is brought in with a purulent conjunctivitis which the parents noticed earlier today. On Gram stain of the purulent exudate, no bacteria are seen. Which of the following bacteria is most likely the cause of the conjunctivitis?
A) Chlamydia trachomatis B) Escherichia coli C) Listeria monocytogenes D) Neisseria gonorrhoeae E) Streptococcus pneumoniae