Total Voting Rights

27 May 2008

Microgen plc ("Microgen")

Total Voting Rights

In accordance with DTR 5.6.1 of the FSA's Disclosure Rules and Transparency
Rules (DTR), Microgen announces that as at today's date, its issued share
capital comprises 102,899,776 ordinary shares of 5p each with voting rights
("Ordinary Shares"). No Ordinary Shares are held in treasury. The voting rights
of all of the Ordinary Shares are identical. The figure above may be used by
shareholders as the denominator for the calculation by which they will
determine if they are required to notify their interest in, or a change to
their interest in, Ordinary Shares in Microgen under the DTR.

If you require further information please contact:

G.E. Liddle, Company Secretary 01252 772 313

www.microgen.com