Abstract: A method of obtaining mold spore material useful for inhalant allergy comprising growing a mold which includes mold spores and mycelia on a medium which supports growth of the mold. A porous barrier is provided between the medium and at least some of the mold so that a first group of the mold spores and mycelia lies on the side of the barrier remote from the medium and a second group of mycelia lies in the medium and on the other side of the barrier. After optimum growth of the mold has occurred, the barrier and the first group of mold spores and mycelia are removed from the medium and allowed to dry. Subsequently, at least some of the first group of mold spores and mycelia are removed from the barrier so that the step of removing separate the first group of mold spores and mycelia from the second group of mycelia. Following drying, the removed mold spores and mycelia are sieved to separate the mold spores from most of the mycelia.