Figure 3.
Phylogenetic analysis of the A(H5N1) neuraminidase (NA) genes from representative viruses from Cameroon. The phylogenetic tree was generated using the maximum-likelihood method. Bootstrap values (n = 500) > 70 are shown. Scale bars indicate substitutions per site. Sequences from representative Cameroonian strains included in the study are indicated in bold and italic. Other control strains are indicated in bold. Representative Cameroonian isolates used for antigenic analysis are indicated with black stars while control strains are indicated with black circles.