# Microorganisms - [Microbial indicators](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/microbial-indicators.md) - [Bacteroides](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/microbial-indicators/bacteroides.md): (endorsed 2011) - [Coliphages](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/microbial-indicators/coliphages.md): (endorsed 2011) - [Clostridium perfringens](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/microbial-indicators/clostridium-perfringens.md): (endorsed 2011) - [Escherichia coli](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/microbial-indicators/escherichia-coli.md): (endorsed 2011) - [Heterotrophic plate counts](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/microbial-indicators/heterotrophic-plate-counts.md): (endorsed 2011) - [Intestinal enterococci](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/microbial-indicators/intestinal-enterococci.md): (endorsed 2011) - [Thermotolerant coliforms](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/microbial-indicators/thermotolerant-coliforms.md): (endorsed 2011) - [Total coliforms](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/microbial-indicators/total-coliforms.md): (endorsed 2011) - [Bacteria](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria.md) - [Aeromonas](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/aeromonas.md): (endorsed 1996) - [Burkholderia pseudomallei](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/burkholderia-pseudomallei.md): (endorsed 2001) - [Campylobacter](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/campylobacter.md): (endorsed 1996) - [Escherichia coli (E. coli) (pathogenic)](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/escherichia-coli-e.-coli-pathogenic.md): (endorsed 2011) - [Helicobacter pylori](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/helicobacter-pylori.md): (endorsed 2011) - [Klebsiella](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/klebsiella.md): (endorsed 1996) - [Legionella](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/legionella.md): (endorsed 1996) - [Mycobacterium](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/mycobacterium.md): (endorsed 2011) - [Pseudomonas aeruginosa](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/pseudomonas-aeruginosa.md): (endorsed 1996) - [Salmonella](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/salmonella.md): (endorsed 1996) - [Shigella](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/shigella.md): (endorsed 1996) - [Vibrio](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/vibrio.md): (endorsed 1996) - [Yersinia](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/bacteria/yersinia.md): (endorsed 1996) - [Protozoa](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/protozoa.md) - [Acanthamoeba](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/protozoa/acanthamoeba.md): (endorsed 1996) - [Blastocystis](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/protozoa/blastocystis.md): (endorsed 2011) - [Cryptosporidium](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/protozoa/cryptosporidium.md): (endorsed 2011) - [Cyclospora](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/protozoa/cyclospora.md): (endorsed 2011) - [Giardia](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/protozoa/giardia.md): (endorsed 2011) - [Naegleria fowleri](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/protozoa/naegleria-fowleri.md): (endorsed 1996) - [Cyanobacteria and their toxins](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/cyanobacteria-and-their-toxins.md) - [Cyanobacteria and their toxins](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/cyanobacteria-and-their-toxins/cyanobacteria-and-their-toxins.md): (endorsed 2011) - [Cylindrospermopsin](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/cyanobacteria-and-their-toxins/cylindrospermopsin.md): (endorsed 2011) - [Microcystins](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/cyanobacteria-and-their-toxins/microcystins.md): (endorsed 2011) - [Nodularin](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/cyanobacteria-and-their-toxins/nodularin.md): (endorsed 2011) - [Saxitoxins](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/cyanobacteria-and-their-toxins/saxitoxins.md): (endorsed 2011) - [Viruses](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/viruses.md) - [Adenovirus](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/viruses/adenovirus.md): (endorsed 2011) - [Enterovirus](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/viruses/enterovirus.md): (endorsed 2011) - [Hepatitis viruses](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/viruses/hepatitis-viruses.md): (endorsed 2011) - [Norovirus](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/viruses/norovirus.md): (endorsed 2011) - [Rotavirus](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms/viruses/rotavirus.md): (endorsed 2011) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-5/microorganisms.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.