Detection of H. felis DNA in gastric biopsy specimens (3.5 months) by PCR (upper bands) and confirmation by Southern blotting (lower bands). Lanes: M, DNA ladder; 1, cat 1; 2, cat 4; 3, cat 5; 4, cat 2; 5, cat 3; 6, cat 6; 7, cat 7; 8, cat 8; 9, cat 9; 10, negative control; 11, DNA from H. felis ATCC 49179.