<Li> X-gal plates are differential for lac operon mutants . </Li> <P> Transport media should fulfill these criteria: </P> <Ul> <Li> Temporary storage of specimens being transported to the laboratory for cultivation </Li> <Li> Maintain the viability of all organisms in the specimen without altering their concentration </Li> <Li> Contain only buffers and salt </Li> <Li> Lack of carbon, nitrogen, and organic growth factors so as to prevent microbial multiplication </Li> <Li> Transport media used in the isolation of anaerobes must be free of molecular oxygen </Li> </Ul> <Li> Temporary storage of specimens being transported to the laboratory for cultivation </Li>

Which of the following genera of bacteria need very specialized media for culturing