Bubonic plague is diagnosed by gram stain and culture of aspirated material from suppurative lymph nodes. Collection of blood specimens, lymph node aspirates from buboes, sputum samples, and tracheal swabs are needed before the administration of antibiotics. Additionally, cerebrospinal fluid (CSF) collection is required in cases suspected to have meningeal complications of plague.  In the United States, reporting of suspicious cases and sending collected material to specialized labs with expertise in Plague testing and to the State Health Department are mandatory procedures.
Yersinia pestis infection laboratory findings
Brucellosis laboratory findings
Legionellosis laboratory findings
Typhoid fever laboratory findings
Trench fever laboratory findings
Paratyphoid fever laboratory findings
Yersinia pestis infection physical examination
Babesiosis laboratory findings