The present invention relates to toll-like receptors, to cells comprising such toll-like receptors, to methods for the detection of immunostimulatory oligodeoxynucleotides wherein such methods use such toll-like receptors, to immunostimulatory oligodeoxynucleotides detected by use of this method, to the use of such immunostimulatory oligodeoxynucleotides in medicine and to vaccines comprising such immunostimulatory oligodeoxynucleotides.