Virus isolation and titration at 33 degrees and 37 degrees C.

Various prototype viruses and original specimens were comparatively titrated in cell cultures at 33 degrees and 37 degrees C. Higher titers at 37 degrees were consistently obtained with adenoviruses; for other viruses (enteroviruses, herpesvirus hominis, vaccinia virus, parainfluenza viruses) the titers were mostly identical at either temperature. Original specimens and prototye strains showed the same behavior. The habit to cultivate viruses from throat swabs at 33 degrees C is unsatisfactory for adenoviruses.