As part of the evaluation in a febrile 18-month-old female,…

As part of the evaluation in a febrile 18-month-old female, the following WBC count with differential is obtained:WBCs 6100/mm (normal 6.0 – 17.0 X103/µL)Neutrophils 35% (normal 40% to 70%)Bands 3% (normal 0% to 4%)Lymphocytes 52% (normal 30% to 40%)Reactive lymphocytes 10%These results increase the likelihood that the cause of child’s infection is: