Reid Smith wrote:
>
> > All cells, plant and animal have cell membranes.
> > In addition plant cells have a cell wall.
> > Animal cells *never* have a cell wall.
-snip-
> Interesting I wonder if-how these cell wall defecient cells relate to
> the mycoplasum that is talked about causing problems in some humans?
>
> Take Care
> Reid
Hi Reid and Listers,
Very interesting that you mention *mycoplasma*, a unique cell indeed.
We need a little background first for the benefit of listers who may
not be familiar with mycoplasma. A little zoology please.
Animal cells have cell membranes of -- protein and lipid.
Plant cells have membranes and-- walls of Cellulose (rigid).
Bacteria cells have membranes and-- walls of Peptidoglycan (flexible).
Viruses have a protein coat. No membrane or wall.
There are five generally recognized life *kingdoms*:
Monera; no nuclear membrane or other membrane-bound parts.
Protista; single celled eukaryotes.
Fungi; produce spores, lack chlorophyll.
Plante; cellulose walls, have chlorophyll, vascular systems.
Animalia; multicellular, specialized organs, heterotrophic.
All these kingdoms are composed of two catagories of cells;
Prokaryotes; no nuclear membrane.
Eukaryotes; have a nuclear membrane.
Kingdom *Monera* is composed of *prokaryote* cells only.
All other kingdoms are composed of *eukaryote* cells.
Our bodies (Animalia) are eukaryote cells, we eat (Plante and
Animalia) eukaryote cells.
Now lets look at the mycoplasma. It is in the kingdom Monera,
prokaryote cells. It has been called half animal and half plant and part
virus. Our body sees the mycoplasma cell and doesn`t know what to do
with it.
Penicillin won`t work on it, mycoplasma has no cell wall to destroy;
thats what penicillin does. Most things don`t work against mycoplasma.
Mycoplasma will do some nasty things to the human body.
Margulis and Schwartz want to place Mycoplasmas and Spiroplasmas in a
*phylum* called Aphragmabacteria, because they differ from all other
bacteria in that they lack cell walls.
Medically, mycoplasma are a genus of minute pleomorphic gram-negative
nonmotile prokaryotic microorganism (family Mycoplasmataceae) without
cell walls, that are intermediate between bacteria and viruses.
Mycoplasma is the cause of *pleuropneumonia*, pleurisy accompanied by
pneumonia. It is highly contagious and affects cattle, goats, sheep and
horses (M.mycoides). It is also a contagious fatal respiratory disease
of young pigs (H.pleuropneumoniae).
M.leprae causes Hanson`s diease and M.lepraemurium cause leprosy in
man. Then there is M.tuberculosis, the cause of the tubercle bacilli in
humans(TB), and the bovine type and the avian type and the reptile type,
etc.& etc.. The M.bovine is a cow and cattle diease which is passed to
humans thru ingestion of milk and beef, it causes TB of the bones and
lymphatic system. Human TB may affect any tissue of the body but most of
the time it is in the lungs.
Keep taking that CS. :-)
Bless you Bob Lee
--
Oozing on the muggy shore of the gulf coast
l...@fbtc.net
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