If we are following the Rochester Criteria then there is no doubt that the
child needs an LP b/c this is a febrile child under 60 days with a Serious
Bacterial Illness. Not to mention I am going to take a leap that the child
does not appear well b/c a CXR was obtained (otherwise it brings up the issue
in why order a test in a well appearing child).
It seems to me that the Rochester Criteria were developed for exactly this
case in mind.
Also, I would question sending a 7 week infant home with clear pneumonia b/c
of the apnea risk (I would be interested in others thoughts on this point).
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