You received a wound culture that yielded the organisms shown below. The culture produced oxidase-positive, beta-hemolytic colonies on BAP. The organisms were resistant to O129. The sample came from a 75 year old man who developed fever and chills. He is a known alcoholic and has been diagnosed of liver cirrhosis. Based on these findings, this organism is most likely:

A physician suspects meningitis, gonococcal conjunctivitis, and chlamydial cervicitis in three different patients. Which combination of specimen collection and transport is most appropriate?

A gram negative bacillus was isolated from a burn infection.  The wound had a greenish coloring and a fruity smell.  The organism was motile, oxidase positive, and K/K on TSI agar.  In OF media, the organism turned yellow in the open tube but was green in the closed tube.  Based on this information, what is the likely causative agent?

A gram negative bacillus was isolated from a clench-fist wound. The organism was gram negative.  The organism pit the agar and the culture emitted a characteristic bleach odor. What is the likely organism?

Which of the following morphologically resembles Streptococcus pyogenes colonies on BAP (beta hemolytic colonies) and causes pharyngitis in older children and young adults. The organism when Gram stained shows as slender, non-spore forming Gram positive rods.

A slow-growing, non-chromogenic Mycobacterium that causes pulmonary disease commonly among immunocompromised patients that does not reduce nitrate, does not produce niacin, and is catalase negative is:

An organism is isolated from the endotracheal tube of a patient receiving chemotherapy. The gram-negative bacillus grows on BAP and produces clear, colorless colonies on MacConkey. The isolate is non-motile, oxidase-negative, and biochemically inactive. Which of the following is the most likely organism?

Anaerobic Gram negative rods are isolated from a decubitus ulcer (bed sore) of a 70 year old patient in a nursing home facility. Below are the results on Kanamycin/Vancomycin agar (left) and BBE agar (right). Based on the information and culture results, which organism would be the likely cause of infection? KV_BBE.jpg 

Gram negative, intracellular, dipolococci are observed from a gram-stained smear taken from red papules on a 15-year-old girl who presents with fever, nausea, vomiting, and stiff neck. She later becomes lethargic and comatose. Which of the following organisms should be suspected?

 A 3  month old infant presented with persistent symptoms that include paroxysmal cough, breathing difficulty, fever and vomiting after a spasm of coughing. Cyanosis (lack of oxygen causing blue skin coloration) and intercostal retractions were noted.  The infant also had a temperature. Nasophyrngeal secretions were collected and analyzed. The image below shows the colonies recovered after 5 days from the selective medium. The organism is biochemically inert. Based on this information, the suspected agent is most likely B pertussis colonies mercury drops.jpg