The ornamental design for a cultureswab, as shown and described.
The single view is a perspective view of a culture swab showing my new design.
In the drawing, the broken away portions represent that no particular length is claimed; the pattern of elongate lines on the surface of the tube represents the ribs and is understood to continuous uniformly throughout the surface; and the flange portion of the culture swab shown in broken lines forms no part of the claimed design.
The design is for a bullet tipped culture swab for use in veterinary medical procedures. The culture swab has a swab that is disposed within the culture swab and deployed during use.