Original: Birds can act as vectors for spreading diseases such as psittacosis , salmonellosis , campylobacteriosis , mycobacteriosis ( avian tuberculosis ) , avian influenza ( bird flu ) , giardiasis , and cryptosporidiosis over long distances .
Simplified: People can catch some bird diseases , for example psittacosis , salmonellosis , campylobacteriosis , Newcastle 's disease , mycobacteriosis , influenza , giardiasis , and cryptosporiadiosis .