From GOOGLE SEARCH for BOTLASS FLY:
Bit like the BOTLASS FLY, the USA doctors do not know to treat the larva in short term visiting tourists who got infected by a mosquito while on holiday and find they have an itchy growing lump under their skin. Tobacco poultice will suck the larva out, by cutting off it's airhole. Almost anything will work, but tourists that have $3000 operations in the USA are a joke!
the welts from the botlass fly last for days but are not really harmful. Ticks of course and scorpions, but the worst is the beefworm. It is the larva of the botfly and it is carried by the mosquito. It comes in with the bite and lives within your flesh while it grows, grabbing hold of your skin with pincers and burrowing in. Nasty little parasite, that. The whole area blows up and is quite painful, there is a burning sensation, but you mustn't pull it, oh no. Then you will definitely get an infection. Instead you must cover the area with glue and tape and suffocate it. The worm squirms underneath for awhile before it dies and that is considered painful by some, but the next morning you can just squeeze the carcass out like toothpaste from a tube."