Felt sick two weeks ago, had some acute gasenteritis . Felt better after it passed. Today, i has gastric problems came back, had soft stool, not liquid. Noticed some bright red string in it, resembled a thin vein , or small branch. They didn t look like worms , nor did they move. Largest piece was 3-4 inches long, ~1-2mm in diameter. Seemed to meet in a cluster, but that was deep inside a big piece of poop, so I m not sure. A few smaller pieces had some mucus like substance on its edges