I think that Plathyhelminthes is taxonomically grouped into Phylum: Vermes which is much more complex compared to microbes..:lol: beside, you can see some differentiated complex of structure in Plathyhelminthes and also…..the important one…plathyhelminthes is multicellular organism right?

Well actually, platyhelminths are not microorganisms. Microorganisms include the bacteria, fungi, archaea, viruses, protozoa. Platyhelminths are considered as low forms of animals. Check on basic Zoology on pseudocoelomates and acoelomates. So this thread should go there.

Microbiology generally is bacteria. The other definitions are all true, but the academic application is almost always bacteria.

Not true about viruses, they are not microorganisms, cause they are organisms. viruses, viroids and prions are included among the subjects of microbiology study "because they are undoubtly tied to and influence the living world"

With viruses, it all depends upon whom you ask. At the intro biology level, we kind of all agree to largely ignore them as "living," (I briefly discuss what rules they break) but at higher levels, where their exceptions are less confusing and the rules-breakers are many, lots of biologists consider them organisms.

I’m agnostic, myself, mostly because what I believe about labels doesn’t much matter to the viruses.

This "microorganism" thing reminded me my microbiology prof. She include them to microorgansms. And what’s more, she talks about "nucleus" of bacteria. 😆

Hmmm…but I think what she said could be related also, since the appearancee of viruses is said from "retarded" small bacteria or a gene that jumped out from the evolution line and form this tiny little-like-creature… 😆

Microorganisms may be tiny, but the relatively new science of microbiology is huge! Prokaryotic bacteria, eukaryotic fungi, and nonliving viruses are just some of the microbes that effect our health and environment. Some are beneficial, others pathogens or opportunistic.

Microbiology is the study of small living things. Generally this means living things that are too small to see without the use of a microscope. These life forms are called microorganisms or microbes. Microorganisms include bacteria, archaea (a type of prokaryote a bit like bacteria but they have a distinct evolutionary origin), viruses, protozoa (single-cell eukaryotes like amoeba), microscopic fungi and yeasts, and microscopic algae (plant-like organisms). Microorganisms were discovered over three hundred years ago and it is thought that many new microbes have yet to be discovered. Microbiology is a wide area of science that includes bacteriology, virology, mycology, phycology, parasitology, and other branches of biology.