title: Letter: Letter: How well does transtracheal aspiration reflect pulmonary infection?
mesh_terms: D000818:Animals; D004285:Dogs; D004756:Enterobacteriaceae Infections / Q000175:diagnosis*; D001239:Inhalation; D008171:Lung Diseases / Q000175:diagnosis* / Q000382:microbiology; D008722:Methods; D012706:Serratia marcescens / Q000302:isolation & purification