Tiffi said:
EDIT: Personally I like being corrected if i mispell something and people correct me all the time!! That what forums are for.. for learning
In that case, only for clarification:
Whether Tiffi knew it or not, she is actually quite correct. A lookup of "bacterias" in the dictionary shows it is the proper inflection form of the word "bacteria". The inflected form is the fancy way of describing the plural of nouns amongst other uses. In our aquaria, we have both Nitrosomonas and Nitrobacter directly involved in the nitrogen cycle (amongst others), it is correct that the fear of loss would be of
bacterias in an acceptable plural form.
http://www.m-w.com/
An example is available from a curriculum unit from Yale under the "Pathogen Contamination":
http://www.yale.edu/ynhti/curriculum/units/1992/5/92.05.11.x.html
None of us here are infallible with spelling, grammar, etc.... with all the angles and loopholes of the English language (not to mention being in a hurry at times and whatever), and hence why most don't tend to correct other folks on trivial items.
Welcome to America Tiffi! I would have never guessed that English was your second language.