Ramos believes he contracted the food poisoning on Monday night after eating shrimp and French fries, though it wasn't until Tuesday morning that he started to feel ill.
"I didn't eat anything since yesterday. [When I tied to eat], I threw it up," Ramos said before Wednesday's game. "I was feeling so bad last night. So now [I'm ready] to eat something, but I have to wait a little bit, but I'm feeling better."
Ramos has received most of the playing time behind the plate this season. Entering Wednesday's action, he was hitting .248 with 12 home runs -- a Nationals record for a catcher -- and 40 RBIs. In his last nine starts, he was 9-for-32 with three home runs and five RBIs.
Although he is doing much better at the plate, Ramos feels there is room for improvement. He believes that he needs to be more patient, as he is known for swinging at the first pitch in crucial situations.
"[I have to] just concentrate a little bit more and get a good pitch to hit. A couple of times, I swung at bad pitches. That's the thing I have to fix," he said.