Figure 4From: PCR-based genotyping of Helicobacter pylori of Gambian children and adults directly from biopsy specimens and bacterial culturesPCR inferred results of mid region of vacA gene. 1.5% gel electrophoresis of H. pylori genotypes showing PCR results of m1 and m2 allelles of vacA gene. Lane M is a 100 bp ladder (Biolabs, UK), lanes 1, 2 and 3 are m1 positive; lanes 4 and 5 showed the presence of m2.Back to article page