Pneumocystis. Is it a Protozoan or a Fungus? Does it exist at all according to 'PG' isolation criteria? 19 October 2004
Previous Rapid Response Next Rapid Response Top
Tony Floyd,
Medical Student
Newcastle University,
Louis Feinberg, Joseph Wardell, Moses Horwitz and Jennifer Hawkins

Send response to journal:
Re: Pneumocystis. Is it a Protozoan or a Fungus? Does it exist at all according to 'PG' isolation criteria?

The 'Perth Group' seems as confused about PCP as it is about HIV. Is this TLA denial?

Pneumocystis was initially misclassified as a protozoan on the basis of its morphologic features, as viewed through a microscope (1). Given that it was later reclassified as a fungus by DNA methods, does the 'Perth Group' believe that pneumocystis is still a protozoan? If not, why can the microscopic appearance of a fungus be of little import and be of such great importance to HIV? Just because it suits your argument?

Has pneumocystis ever been isolated according to the fictitious 'rules' that you have insisted that HIV be isolated by?

Is there anywhere in existence an EM picture of a pneumocystis with no other cellular debris in the field of view?

Does PCP therefore exist?

***

References:

(1) Edman JC, Kovacs JA, Masur H, Santi DV, Elwood HJ, Sogin ML. Ribosomal RNA sequence shows Pneumocystis carinii to be a member of the fungi. Nature 1988;334:519-522.

Competing interests: None declared