C ASE STUDY Can Koch’s postulates be fulfilled for all viral pathogens? What steps might present difficulties for viral pathogens? For some scientists Koch’s postulates still have not been...

C ASE STUDY

Can Koch’s postulates be fulfilled for all viral pathogens? What steps might present difficulties for viral pathogens? For some scientists Koch’s postulates still have not been sufficiently fulfilled to say that HIV causes the disease syndrome of AIDS. Visit this website http://www.niaid.nih.gov/publications/hivaids/12. htm and explore more about this issue.