It is not the "Varoa Destructor" but another mite that carries other bee unfriendly organisms. Dr Denis Aderson has been doing research on this mite in New Guinea and the Varoa Destructor from overseas for quite a number of years. he would be on the Web somewhere in the CSIRO or Government organisation identified with biosecurity issues. There is a DVD called "Honeybee Blues" that was made last year that gives a real easy to understand veiw of varoa and the impliactions for all of us.