The serologic test for legionella infection is species-specific and focuses on Legionella pneumophila, not on other species, which remain possible, if unlikely, culprits.

• 军团杆菌感染的血清学检查是一种针对嗜肺性军团杆菌的种属特异性的检查，而不包括其他种属，所以即使结果阴性，也有感染的可能。