Division of Infectious Diseases

Case of the Month - June 2016

 

  

A 49 year old man was hospitalized for pneumonia. He had been in good health until four days before hospitalization, when he 
developed fever, pleuritic pain, and a productive cough.
 

His only previous medical history was another bout of pneumonia about ten years previously.
He was not on any medications, had no sick contacts, and did not use tobacco or alcohol, although he smoked a lot of
marijuana every day.
 

On physical exam, left-sided rhonchi were present. A chest X-ray was done (Figure 1). Vancomycin and ceftriaxone were started. 
The cavitary lesion surrounded by an infiltrate was confirmed on a CT scan of the thorax (there were no additional findings). 

A bronchoalveloar lavage was done. Photos of the Gram stain (Figure 2) and growth on blood and MaConkey agars from
the bacterial culture (Figure 3) are shown below. The microbiology technologist noted that the organism was a small
Gram-negative rod that was lactose-negative and both oxidase and catalase positive. After 24 hours, the organism also
demonstrated the ability to oxidize xylose. It was susceptible to meropenem but resistant to all penicillins, cephalosporins,
trimethoprim-sulfamethoxazole, aztreonam, aminoglycosides, and colistin.
 


Answer: lung abscess caused by Achromobacter xylosoxidans
 
What is the organism? /uploadedImages/departments/medicine/Divisions/Infectious_Diseases/June-2016-CXR.png
Figure 1: Chest X-ray with cavitory infiltrate (click on image to enlarge)
 /uploadedImages/departments/medicine/Divisions/Infectious_Diseases/June-2016-Gram stain.png
Figure 2: Gram stain fo BAL fluid (click on image to enlarge)
 
  
  

 








/uploadedImages/departments/medicine/Divisions/Infectious_Diseases/June-2016-BAL culture.jpg 

 

 

 

 Figure 3: Colonies from BAL fluid culture (click on image to enlarge)

 

 

 

ASP News

Antimicrobial Stewardship Program Designated as Center of Excellence by IDSA
The Antimicrobial Stewardship Program (ASP) at Montefiore, led by medical director Priya Nori, MD, has been designated as a Center for Excellence by The Infectious Diseases Society of America (IDSA). It is among 25 academic sites in the nation – and one of few in New York City, to receive this prestigious recognition, which was announced on August 15, 2018.

 

Conferences & Seminars

Infectious Diseases Grand Rounds at Montefiore
Visiting Professor
Dr. Cindy Sears Professor of Medicine, Oncology and Molecular Microbiology and Immunology Johns Hopkins University School of Medicine Bloomberg-Kimmel Institute for Immunotherapy
Wednesday, October 24, 2018 @ 9:00 AM

Conference & Seminar Schedules

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