Total Voting Rights

5th September 2007

Microgen plc ("Microgen")

Total Voting Rights

In accordance with the FSA Disclosure and Transparency Rules, Microgen
announces that as at today's date, its issued share capital comprises
102,779,776 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 FSA Disclosure and Transparency Rules.

If you require further information please contact:

G E Liddle, Company Secretary 01252 772313

www.microgen.co.uk