Dr. jones discovers that the enamel on a new patient's anterior teeth is mottled and pitted, but the patient doesn't have any caries. most likely, the damage is the result of

a. ingestion of excessive fluoride.
b. brushing with a hard toothbrush.
c. a high-fiber diet.
d. overuse of an oral irrigation device.

A48-year-old male presents with an 8-day history of productive cough, subjective fevers, and malaise. he is otherwise healthy without any active medical problems. he is a social drinker of alcohol, and denies any tobacco or drug use. on physical examination, the patient is alert and oriented. his temperature is 100.4 0 f, pulse rate is 56, respiratory rate is 18, and blood pressure is 133/64. heent is within normal limits and a chest exam has diffuse expiratory wheeze with decreased sounds to the right lower lung fields. blood labs reveal wbc 14.4, hgb 11.3, plt 233, alt 65, ast 102, and po 4 2.1. a chest x-ray reveals a dense consolidation with bulging fissures. based on these findings, what is the most likely pathogen affecting this patient?