In 2019, a 75-year-old white non-Hispanic man presented to an emergency department with a 3-day history of sore throat with difficulty in swallowing and fever. The result of a rapid streptococcal test of a throat swab specimen for Strep group A was negative. The patient was prescribed erythromycin and sent home; the patient reported allergies to cephalosporins and penicillin. He returned to his primary care physician the next day because of persisting sore throat and worsening difficulty swallowing and breathing, and he was hospitalized. On examination in the hospital, the patient's oral temperature was 38.3C, and he had copious nasopharyngeal secretions. A direct smear from a swab revealed the following result after Gram staining (magnified nasopharyngeal 1,000). 1. a) What is your diagnosis of the disease? 2. b) Name the likely pathogen. test c) How can you further identify the causative agent of the disease? Describe 2 tests that you can perform with indication of the result that you would expect. Interpretation of result predicted result