(Bethesda, MD)  --  A Minnesota boy is the seventh victim of the so-called "superbug" at the National Institutes of Health in Maryland.  N-I-H officials say the boy arrived in April and was being treated for complications from a bone marrow transplant when he contracted the deadly germ.  He died September 7th.  The Washington Post reports 19 patients at the hospital have contracted the antibiotic-resitant strain of K-P-C and the Minnesota boy was the first new infection since January.  The outbreak stemmed from a single patient last summer.