| If the plug enlarges and is on the surface of the skin, exposed to the air, it is called an open comedo, or blackhead. |
| Nifursol is the last histomonostat still to be permitted in the EU for use as an additive in poultry feed to prevent blackhead disease. |
| However, blackhead can be efficiently controlled through good management and biosecurity practices. |
| When this ban comes into force on 31 March, there will, for example, be a crisis in the treatments used to combat blackhead disease in turkeys. |
| The black color of a blackhead is not caused by dirt, but by cells and oil in the follicle when they are oxidized by oxygen in the air. |
| Meanwhile, this beauty equipment is also suitable for removing blackhead and acne. |
