Episode 19

"Harmful Bacteria" (悪玉菌) is the nineteenth episode of the Cells at Work! anime.

Synopsis
The antibody information of a cell is leaked and there's tension in the air. The journey to reunite the lactic acid bacteria with their friends brings the group to the large intestine.

Plot
U-1146, Normal Cell, and Natural Killer Cell travel to the large intestine. The last part of the gastrointestinal tract is full of toxic gas due to harmful bacteria. At the same time, AE3803 joins the platelets on a tour of the large intestine.

Memory T Cell, who was promoted from Killer T Cell, joins the group in search of Cancer Cell. U-1146 encourages Normal Cell to leave them and find where the lactic acid bacterium is.

The group's search becomes a little bit harder when harmful bacteria invade the large intestine. Thus, forcing Normal Cell to run while AE3803 helps the platelets to evacuate.

Cancer Cell ambushes U-1146, Natural Killer Cell, and Memory T Cell. They quickly dispatch him, but it turns out to be a copy.

The real Cancer Cell appears in front of them and beats them without much struggle.

Suddenly, they hear the sound of high heels.

New characters

 * Goblet Cell

Returning characters

 * Normal Cell
 * U-1146
 * Natural Killer Cell
 * Lactic Acid Bacteria
 * AE3803
 * Platelet Division
 * Cancer Cell
 * Killer T Cell