Total Voting Rights

Immunodiagnostic Systems Holdings plc

('the Company')

31 March 2010

Total Voting Rights

In conformity with the FSA's Disclosure and Transparency Rules, the Company notifies the market of the following:

As at the date of this announcement, the Company's issued share capital consists of 27,854,566 ordinary shares with a nominal value of 2 pence each ('Ordinary Shares'), with voting rights.

The Company does not hold any Ordinary Shares in Treasury.

The above figure of 27,854,566 Ordinary Shares may be used by shareholders in the Company as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change in their interest in, the share capital of the Company under the FSA's Disclosure and Transparency Rules.

For further information:

Immunodiagnostic Systems Holdings plc Tel: 0191 519 0660

Roger Duggan, CEO

Paul Hailes, Finance Director

Brewin Dolphin Investment Banking Tel: 0845 213 4730

Andrew Emmott

Sean Wyndham-Quin