General
5-6mm long with a grey thorax with three indistinct longitudinal stripes on it. The abdomen has an extensive area of yellow at its base. Wing span is 10-12mm and venation is characteristic with the fourth longitudinal vein extending to the wing margin in a relatively straight line.

Significance 
Potential vectors have a wide range of diseases such as dysentery gastroenteritis and tuberculosis. They can transmit intestinal worms. They move from filth to food and therefore move pathogens from dirty to clean areas. Flyspotting is produced when feeding and defecating.

Control
Eliminate the source where possible. Application of a residual insecticide to breeding sites and areas where the flies congregate. Fly screening to windows. Ultra low volume application of a mist of insecticide of adult flies.  Specialist advice required for control in animal units.