A 28-year-old man visits the clinic with complaints of a per…
A 28-year-old man visits the clinic with complaints of a persistent cough that has lasted for three weeks. He describes the cough as productive, with occasional streaks of blood in the sputum. He has also been experiencing unintentional weight loss (about 10 pounds over the last month), night sweats that soak through his clothes, and persistent fatigue.The patient denies recent travel outside of the United States but mentions that he volunteers weekly at a local homeless shelter, where he interacts closely with the residents. He is a non-smoker and has no significant medical history. He works as a part-time barista and does not have access to regular healthcare.Upon examination, his vital signs show a low-grade fever (99.6°F). A physical exam reveals mild crackles in the upper lungs. A chest X-ray demonstrates upper-lobe opacities with cavitation and fibrosis, which were later confirmed as accumulations of bacteria and white blood cells, surrounding by calcified deposits. A sputum sample is obtained for further testing.a. What is the pathogen (species name required) most likely responsible for this patient’s symptoms? Explain your reasoning. b. What is the transmission method of this pathogen?
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