Notifiable Interest

microgen

Information Management Solutions

www.microgen.co.uk

6th October 2005

Microgen plc (the 'Company')

Notifiable Interests

The Company received notice on 6th October 2005 under Sections 198-202 of the
Companies Act 1985 that Aberforth Partners is interested in 15,238,151 Ordinary
Shares representing 14.89% of the issued share capital of the Company, which is
currently 102,327,567 Ordinary Shares.

The shares are registered in the name of:

                                                                  No. of shares
                                                                               
Nortrust Nominees Limited A/C ABERFRTH                               12,296,451
                                                                               
Bank of Ireland Nominees Limited                                        766,500
                                                                               
The Church, Commissioners for England (Chase                          1,016,300
GIS) Nominees Limited                                                          
                                                                               
State Street Nominees Limited A/C JD59                                1,158,900
                                                                               
                                                                     15,238,151

If you require further information please contact:

G.E. Liddle, Company Secretary

Tel: [phone]