A sputum sample was brought to the laboratory for analysis. Gram stain revealed the following: rare epithelial cells, 8 to 10 polymorphonuclear leukocytes per high-power field, and pleomorphic Gram-negative rods. As the laboratory consultant, which of the following interpretations should you make?
Many sputum specimens are cultured unnecessarily. Sputum is often contaminated with saliva or is almost totally made up of saliva. These specimens rarely reveal the cause of the patient's respiratory problem and may provide laboratory information that is harmful. The sputum in question appears to be a good specimen. The pleomorphic Gram-negative rods are suggestive of Haemophilus, but culture of the secretions is necessary. Reference: Ananthanarayan and Paniker&;s Textbook of Microbiology Tenth edition
The sputum specimen is too contaminated by saliva to be useful
The appearance of the sputum is suggestive of Haemophilus pneumonia
The patient has pneumococcal pneumonia
There is no evidence of an inflammatory response
Bacteriology