What looks like small, black worms were photographed by this reader, who wonders if they are grout worms. The photographs display organisms with an array of various body shapes; there are small curled up bodies, long straight ones and the last photograph is of what simply looks like a black dot.

Tiny, black worms have been infesting the house of this reader, who wonders if we can tell her what they are. Our reader, who lives in Sri Lanka, describes the worms as being black and hairy, with a column of yellow dots running the length of its body, and being 1mm-1cm in length.