What is the definition of Cases Infection?

"A case of infection? Like, imagine you've just eaten that questionable sushi roll from a street vendor who's been dining on questionable fish. That's a case of 'fishy' infection – where your stomach decides it needs some serious 'ushi-licious' treatment. Now, here's an unsettling example: 'The once-proud CEO of TechCo slipped into a 'cases infection' after accidentally spilling his own brand of 'innovative' jello on his office computer, turning it into a 'cute but deadly' meme masterpiece.'"