7 weeks baby girl was brought into the hospital with a rash on the palms of her hands and soles of her feet only with fever, cough and high WBC count.

7 weeks baby girl was brought into the hospital with a rash on the palms of her hands and soles of her feet only with fever, cough and high WBC count. The baby was premature 35 weeks at a weight of 2.97kg. She was treated with Penicillin G for 14 days & testing after that showed the treatment was successful. The parents were treated too. What infection does she have and how would you identify the sources and why? Name the causative agent and what are the virulence factors for it? What type of testing would you use to make sure of your diagnosis? At what stage of the infection is she, and why? Explain the microbial and the immune response. Why penicillin like antibiotics is effective and how does that relate to the virulence factors for the pathogen? (microbiology)