Is Shigella flexneri Gram positive or negative?

Also, is Shigella Flexneri catalase positive/negative?

The Shigella species are small, Gram-negative rods. They produce pink colonies with XLD medium, and colourless colonies with DCA. Shigella species are facultative Anaerobes. They are non-motile and oxidase, urease, and colorless colonies on DCA.

The next question is: What causes Shigella Flexneri? This infection is caused by a bacteria called Shigella. It can cause stomach pains, fever, and watery diarrhea.

Another question that might be asked is, "How do you identify Shigella?"

Shigellosis is suspected by a doctor based on typical symptoms such as fever, pain, and watery diarrhea in people who have likely been exposed to the bacteria. Doctors take a stool sample and send it to a laboratory for culture and identification to confirm that shigellosis has been diagnosed.

Is Shigella dysenteriae a bacteria?

Shigella dysenteriae, a rod-shaped bacterial species, is Shigella. Shigella can cause Shigellosis (bacillary Dysentery). Shigellae are a Gram-negative, facultatively anaerobic and nonmotile, nonspore-forming, non-spore-forming, Gram-negative bacteria.