Thursday, December 12
Question of the Day
A four-month-old filly is presented with a four-day history of lethargy, heavy breathing, cough and decreased appetite.
| Value | Normal |
|---|---|
| 104.9°F (40.5°C) | 99.0–100.6°F (37.2–38.1°C) |
| HR=72 bpm | 28-40 bpm |
| R=44 brpm | 10-14 brpm |
On lung auscultation asymmetrically-distributed crackles and wheezes are audible. Some areas have no breath sounds and a dull resonance on thoracic percussion. A lateral chest radiograph shows consolidated nodular lung lesions and mediastinal lymphadenopathy.
Pneumonia due to Rhodococcus equi infection is confirmed based on culture and polymerase chain reaction results on a transtracheal wash.
Which one of following choices is the most appropriate treatment?