Cell Wall Deficient Forms,Stealth Pathogens PDF

Preface

Pleomorphic forms are the first growth in culture, and usually predominate as the pathogen flourishes in vivo. They were observed in clinical specimens in the laboratories of Louis Pasteur and Robert Koch and recognized as pathogenic. So why have they been ignored for many decades? In classrooms, two errors have been perpetuated: (1) students are taught to fix smears with heat [due to their high lipid content, cell wall deficient (CWD) forms melt into globs when heated], and (2 ) only the Gram stain is on the desks of microbiology students. The Gram stain should always be accompanied by Acridine Orange, which shows that otherwise unidentified material contains nucleic acids and, therefore, is cellular. Pleomorphism is an unfortunate phenomenon from the diagnostic point of view. Bacteria and fungi have lost their name tags. However, the greater effi ciency in solving diagnostic mysteries compensates for the great inconvenience in identification.

After you peruse this volume, you should know the answers to the following:

1. What organism should be added to the childhood vaccine, especially for boys? (Chapter 13.)

2. What bacterium in its pleomorphic state is found in direct smears of synovial fluid of rheumatoid arthritis cases? (Chapter 19.)

3. In what chronic disease (currently listed as of unknown origin) is an acid-fast organism routinely found in smears of 72-h blood cultures in any routine medium? (Chapter 21.)

4. Which "bacterium" has a life cycle in the human erythrocyte as complex as that of Plasmodium malaria? (Chapter 25.)

5. The L form, of which common pathogen can permanently damage mammaliam myocardium. (Chapter 11.)

Those who made significant contributions to the 2 nd edition are not forgotten. The maj or financial contributors to the 2 nd edition have given significant support to this third volume. Alva Johnson has been a font of information; Phillip Hoekstra, Steven Phillips, and JoAnne Whitaker were valued collaborators in research; editing was accomplished by Michael P. Looney, Charlotte Olds, Charmaine Ramstead, Sandra Augustine, Richard Berri, and Mary L. Aselstein; and Ernest Hayes offered untiring technical assistance.