So basically, if it's any of numerous reasonably well-known but very local diseases a fluid's probably going to go colored in some field test kit and say which one, else it could be something known (and often of known substantial concern for large-scale contagion) but too rare or understudied to have cheap robust quick tests yet so that has to be shipped to a real lab (probably with very high biosecurity rating), and if the lab doesn't recognize what they're seeing in their electron microscope and has to do fundamental research first to get a good biochemical profiling it's something truly expanding the boundaries of known infectious pathology?
