A 65-year-old man undergoing treatment for chronic myeloid leukemia is brought to the hospital with headaches, fever, vomiting, and blurry vision for 3 days. He says the headaches are 10/10 in intensity now, causing some changes in his vision. He also had some episodes of diarrhea over the previous 3 days after eating a deli-meat sandwich from a local cafe. Physical exam reveals neck rigidity and photophobia. Vitals show a fever of 101 F, blood pressure 160/100, heart rate 110/min, and respiratory rate 14/min. Labs reveal a white count of 14000/microL. An urgent CT head is negative for any acute pathology, and a lumbar puncture is performed. Gram stain and culture are sent from the CSF. Which of the following findings is most likely to be seen on the gram stain of this patient's CSF?

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