leesma, who was a neuropathology of eminent credentials. >> i guess i need to define what pathology isy of human disease. how it looks under the microscope, how it does its dirty business. i looked at the microscopic slide, look at this, there was obviously an infection present. i was curious to see what organisms could be found and that requires a special stain and that enabled me to say, yes, these upfected areas are bacteria form and are extent and, therefore, could be life threatening. it's a cause of death right there. >> i did a little research and found out who was the man, the physician on pediatric infectious diseases, that's dr. jerome kline from harvard. boston university med, a world class expert on pediatric infectious diseases. >> there's no doubt in my mind that this child died because of overwhelming num caulk kl sepsis. sepsis is a clinical term that applies there is a systemic infection. the history that had been provided by the mother was that the child had been ill for a couple of days with vomiting, diarrhea, but on the morning of september 21st, the mom had observ