You get called by a public health department in Nova Scotia (or Switzerland, Great Britain, Germany, or southern France). They're wondering if you can help because a number of their sheep and goats have had spontaneous abortions, and some of their cattle have had low birthweight offspring.
"Um...," you say.
Well, they also want your opinion because a few of the farm workers and veternarians have come in sick. Most are men between 30-70 years of age. Some have presented with a self-limited flu-like illness with an abrupt high-grade fever, fatigue, headache, and myalgias. Others have presented with a mild nonproductive cough, fever, and a CXR shown below (A is normal, B is the patient).
Here is the organism:
Challenge: What's your diagnosis?
Both images are in the public domain.