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Bacteria measuring fecal water contamination
Indicator bacteria are types of bacteria used to detect and estimate the level of fecal contamination of water. They are not dangerous to human health
Indicator_bacteria
Species that reveals the status of an environment
Certain bacteria can be used as indicator organisms in particular situations, such as when present in bodies of water. Indicator bacteria themselves
Bioindicator
Bacteria
saprotrophic indicator bacteria are often considered signals of community health in soil, aquatic, and bodily systems. All saprotrophic bacteria are unicellular
Saprotrophic_bacteria
Types of bacteria found in feces
TCR, with minor corrections in 2014. Coliform bacteria Coliform index Colony-forming unit Indicator bacteria Doyle, M. P., and M. C. Erickson. 2006. "Closing
Fecal_coliform
Topics referred to by the same term
characteristic of an environment Indicator bacteria, bacteria used to detect and estimate the level of fecal contamination of water Indicator organism, organisms used
Indicator
Group of bacterial species
presence of coliform bacteria. Medicine portal Bacteriological water analysis Coliform index Fecal coliform Indicator bacteria Pathogenic Escherichia
Coliform_bacteria
Infection that results in the death of the body's soft tissue
Necrotizing fasciitis (NF), also known as flesh-eating disease or flesh-eating bacteria, is an infection that kills the body's soft tissue. It is a serious disease
Necrotizing_fasciitis
Observed value of a variable in statistics
Bioindicators, such as indicator bacteria, are ecological indicators, sometimes requiring further consideration of environmental indicators. In public health study
Indicator_(statistics)
Differential media
and isolation of gram-negative bacteria. The media detects lactose fermentation by enteric bacteria with the pH indicator neutral red. It contains bile
MacConkey_agar
Water supplied through a pipe and tap combination
within the system can cause contamination of tap water. If fecal indicator bacteria are found, it indicates that the water source may have been contaminated
Tap_water
Method of analysing water
primary analysis is for indicator organisms rather than the pathogens that might cause concern. Indicator organisms are bacteria such as non-specific coliforms
Bacteriological water analysis
Bacteriological_water_analysis
Chemical compound
Methyl orange is a pH indicator frequently used in titration because of its clear and distinct color variance at different pH values. Methyl orange shows
Methyl_orange
Chemical indicator that turns red in acidic solutions
is an indicator dye that turns red in acidic solutions. It is an azo dye, and is a dark red crystalline powder. Methyl red is a pH indicator; it is red
Methyl_red
Chemical compound
1021/j100884a007. McFeters, GA; Camper, AK (1983). Enumeration of indicator bacteria exposed to chlorine. Vol. 29. pp. 177–93. doi:10.1016/S0065-2164(08)70357-5
Hypochlorous_acid
Virus that infects bacteria
infects and replicates within bacteria. The term is derived from Ancient Greek φαγεῖν (phagein) 'to devour' and bacteria. Bacteriophages are composed of
Bacteriophage
Storage of water by various means
140-180% more fecal indicator bacteria than the water they were supplied with. Fertilizer Runoff Fluorosis Arsenic Poisoning Bacteria and other organic
Water_storage
Untreated water found in a natural environment
44(5), 1573-1579 Clark, J. A.; et al. (1982). "Characterization of indicator bacteria in municipal raw water, drinking water, and new main water samples"
Raw_water
Culture medium used in microbiology
bacteria while inhibiting the growth of others. It contains a high concentration (about 7.5–10%) of salt (NaCl) which is inhibitory to most bacteria—making
Mannitol_salt_agar
Method to detect presence of polysaccharides
comparative Raman spectroscopy. Starch is often used in chemistry as an indicator for redox titrations where triiodide is present. Starch forms a very dark
Iodine–starch_test
Water content of the soil
Debra T.; Simonson, Gerald H. (1978). "Survival and movement of fecal indicator bacteria in soil under conditions of saturated flow". Journal of Environmental
Soil_moisture
River in New Zealand
freshwater and marine sites during that summer, 16 samples exceeded faecal indicator bacteria levels, and 1 of those samples was from Lee River. In November 2018
Lee_River
Body of water in the U.S. state of Texas
significant environmental challenges, including elevated levels of indicator bacteria, low oxygen saturation, and heavy nutrient pollution. In February
Buffalo_Bayou
Resistance of microbes to drugs directed against them
humans, animals, and plants. Any microbe can develop resistance, including bacteria (antibiotic resistance), viruses (antiviral resistance), parasites (antiparasitic
Antimicrobial_resistance
Device or smart label that shows temperature history
temperature indicator (TTI) is a device or label that shows the accumulated time-temperature history of a product. Time temperature indicators are commonly
Time_temperature_indicator
Bacteria that produce light through chemiluminescence
Bioluminescent bacteria are light-producing bacteria that are predominantly present in sea water, marine sediments, the surface of decomposing fish and
Bioluminescent_bacteria
Bacteria and fungi rendering food unsafe
produced by bacteria or fungi, during the spoilage process. Colorimetric analysis can also be used to detect biogenic amines, which are indicators of food
Food_spoilage
Neighborhood in Harris, Texas, United States
Retrieved September 13, 2017. "Eight Total Maximum Daily Loads for Indicator Bacteria in Greens Bayou Above Tidal and Tributaries" (PDF). Texas Commission
Greenspoint,_Houston
Order of viruses
tested as a method for detecting human feces. The virus may outperform indicator bacteria as a marker for human fecal contamination. The presence of crAss-like
CrAssphage
example, lactose fermenters turn a deep red when this pH indicator is used. Those bacteria unable to ferment lactose, often referred to as nonlactose
Sorbitol-MacConkey_agar
deep blue in case of alkalinization. Lactose-positive bacteria build yellow colonies. Bacteria which decarboxylate L-cystine cause an alkaline reaction
Cystine–lactose–electrolyte-deficient agar
Cystine–lactose–electrolyte-deficient_agar
Urban stream in California
Retrieved March 20, 2019. Bardsley, Audra (May 2007). "Patterns of Fecal Indicator Bacteria in the Aliso Creek Watershed". Brown University. Archived from the
Aliso_Creek_(Orange_County)
Selective and differential agar
contains indicators of lactose fermentation and hydrogen sulfide production; as well as inhibitors to prevent the growth of Gram-positive bacteria. It is
Hektoen_enteric_agar
Protected wilderness area in Montana and Wyoming, United States
Contamination to Wilderness Waters Using Droplet Digital PCR and Fecal Indicator Bacteria Methods". Wilderness & Environmental Medicine. 32 (3): 332–339. doi:10
Absaroka–Beartooth_Wilderness
Rod-shaped, gram-negative bacterium
they constitute about 0.1%, along with other facultative anaerobes. These bacteria are mostly harmless or even beneficial to humans. For example, some strains
Escherichia_coli
Chemical compound
is a dye of the triphenylmethane family (triarylmethane dyes) and a pH indicator. It is colored yellow below pH 5.2, and violet above pH 6.8. In its cyclic
Bromocresol_purple
Canadian biologist
Cloutier, A. Labelle, J.-N. Duff and C. Ansseau. 1996. Responses of indicator bacteria to forest soil amended municipal sewage sludge from aerated and non-aerated
Liette_Vasseur
Mucus that is coughed up from the lower airways
caused by pneumococcal bacteria (in pneumonia), pulmonary embolism, lung cancer or pulmonary tuberculosis. Brownish –potential indicator of chronic bronchitis
Sputum
20 mg of the indicator bromocresol purple is added. Different types of bacteria can be differentiated on the agar by their color. Bacteria able to decarboxylate
Lysine_iron_agar
Canyon in the Mexican state of Baja California and the US state of California
removed from the U.S. budget. In October 2017, the amount of fecal indicator bacteria was found to be in above-average concentrations. In February 2018
Goat Canyon (Tijuana River Valley)
Goat_Canyon_(Tijuana_River_Valley)
Urban legend
Urine-indicator dye is a mythical substance that is supposed to be able to react with urine to form a colored cloud in a swimming pool or hot tub, thus
Urine-indicator_dye
the Mfoundi River watershed at Yaoundé, Cameroon, as inferred from indicator bacteria of fecal contamination". Environmental Monitoring and Assessment.
Mfoundi_Flood_Canal
Bacterium that causes tuberculosis
tuberculosis (M. tb), also known as Koch's bacillus, is a species of pathogenic bacteria in the family Mycobacteriaceae and the causative agent of tuberculosis
Mycobacterium_tuberculosis
Chemical compound
dye with formula C37H30ClN3. It is used as an indicator in agar for detection of lipase activity in bacteria. "Opal Blue SS". National Center for Biotechnology
Spirit_blue
Solid or semisolid remains of undigested food
that was not digested in the small intestine, and has been broken down by bacteria in the large intestine. Feces contain a relatively small amount of metabolic
Feces
Organisms that obtain energy by the oxidation of electron donors in their environments
vents. Some examples of chemotrophic organisms include iron-oxidizing bacteria and methanogenic archaea. Chemoautotrophs are autotrophic organisms that
Chemotroph
Type of heterotrophic nutrition based on decayed organic matter
Saprotrophic digestion is most often performed by fungi (e.g. Mucor) and soil bacteria. In fungi, this is usually done by actively transporting such materials
Saprotroph
Water purity rating based on fecal bacteria content
water based on a count of fecal bacteria. It is one of many tests done to assure sufficient water quality. Coliform bacteria are microorganisms that primarily
Coliform_index
River in California, United States
constructed wetlands to filter pollutants, including excess nutrients and indicator bacteria, before flows reach Upper Newport Bay. Furthermore, the OCPW plans
San_Diego_Creek
Milk-based medium used to distinguish between different species of bacteria
used to distinguish between different species of bacteria. The lactose (milk sugar), litmus (pH indicator), and casein (milk protein) contained within the
Litmus_milk
Species of bacterium
for animals, and even exhibit mutualism with certain plants. B. cereus bacteria may be aerobes or facultative anaerobes, and like other members of the
Bacillus_cereus
Coastline care
indicator organisms, can reproduce in the conditions created by decomposing wrack. Wrack can sustain potentially harmful bacteria and fecal indicator
Beach_cleaning
Solid, liquid or gel used to grow microorganisms or cells
media differential media transport media indicator media Culture media contain all the elements that most bacteria need for growth and are not selective
Growth_medium
Method of allowing microorganisms to multiply in a controlled medium
lactose-fermenting bacteria through a pH indicator that changes color when acids are produced from fermentation. On multitarget panels, bacteria isolated from
Microbiological_culture
Phylum of photosynthesising prokaryotes
(/saɪˌænoʊbækˈtɪəriə/ sy-AN-oh-bak-TEER-ee-ə) are a group of autotrophic gram-negative bacteria of the phylum Cyanobacteriota that can obtain biological energy via oxygenic
Cyanobacteria
Shallow pond or reservoir for arid areas
and typhoid, and infection from a number of gut parasites. Fecal indicator bacteria Escherichia coli and Fecal streptococcus are commonly found in water
Water_pan
1943 experiment into rate of mutations
experiment (1943) (also called the Fluctuation Test) demonstrated that in bacteria, genetic mutations arise in the absence of selective pressure rather than
Luria–Delbrück_experiment
Group of antibiotics derived from fungi
widely used today for various bacterial infections, though many types of bacteria have developed resistance following extensive use. In the United States
Penicillin
Species of bacterium
Raoultella planticola is a species of Gram-negative bacteria in the genus Raoultella. R. planticola is quite similar in appearance to Klebsiella pneumoniae
Raoultella_planticola
Plastic debris suspended in water and organisms which live in it
and serves as a habitat for various types of microorganisms, including bacteria and fungi. As of 2022, an estimated 51 trillion microplastics are floating
Plastisphere
Species of gastropod
Enterobacteriaceae and others. According to the measurement of hygienic indicator bacteria Escherichia coli in 2001, the meat of Bullacta exarata meets national
Bullacta_exarata
Species of bacterium
positive in M. morganii, an indicator dye that turns red due to the bacterium's acid production during fermentation. Similar bacteria from the closely related
Morganella_morganii
Inflammation of abdominal organ lining
viscus, mixed bacteria are isolated; the most common agents include Gram-negative bacilli (e.g., Escherichia coli) and anaerobic bacteria (e.g., Bacteroides
Peritonitis
Beneficial symbiosis between species
them to adapt to the human habitat more successfully. Numerous genera of bacteria and fungi live on and in the human body as part of its natural flora. The
Commensalism
Blue dye also used as a medication
described here above in the paragraph on redox indicator. Methylene blue is a dye behaving as a redox indicator that is commonly used in the food industry
Methylene_blue
Genus of bacteria
Vázquez-Boland, José A. (23 October 2025). "List of Recommended Names for bacteria of medical importance: report of the Ad Hoc Committee on Mitigating Changes
Raoultella
Inflammation of the alveoli of the lungs
condition is variable. It is usually caused by infection with viruses or bacteria, and less commonly by other microorganisms. Diagnosis is often based on
Pneumonia
Topics referred to by the same term
to find the character of a potential candidate by measuring a single indicator The Litmus Test, a Radio 4 programme presented by Fred Harris The Litmus
Litmus_test
Biological process
potential as indicators of the availability of permanent hydrocarbon- based energy sources. In the process of chemosynthesis, bacteria produce organic
Chemosynthesis
Chemical compound
Decolorized Acid Fuchsin as an Acid Indicator in Carbohydrate Fermentation Tests with some Remarks on Acid Production by Bacteria". Journal of Infectious Diseases
Acid_fuchsin
used in the production of an anaerobic environment. It is used to culture bacteria which die or fail to grow in the presence of oxygen (anaerobes). These
Gas-pak
Petri dish with agar used to culture microbes
the culture of stool samples and contains two indicators. It is formulated to inhibit Gram-positive bacteria, while the growth of Gram-negative bacilli is
Agar_plate
Species of bacterium
also contains phenol red pH indicator which turns pink when it reacts with alkaline byproducts generated by the bacteria when it grows. Alternatively
Burkholderia_cepacia_complex
Chemical compound
produced by a variety of bacteria including Burkholderia gladioli. It also has antibiotic properties. Toxoflavin acts as a pH indicator, changing between yellow
Toxoflavin
Biomarker for human faecal matter
5β-coprostanol is stable for many hundreds of years enabling it to be used as an indicator of past faecal discharges. As such, records of 5β-coprostanol from paleo-environmental
Coprostanol
Organism using inorganic substrate to obtain reducing equivalents for use in biosynthesis
called "prokaryotic symbionts". An example of this is chemolithotrophic bacteria in giant tube worms; or plastids, which are organelles within plant cells
Lithotroph
Chemical compound
sludge. Pyrrhotite is a waste product of the Desulfovibrio bacteria, a sulfate reducing bacteria. When eggs are cooked for a long time, the yolk's surface
Iron(II)_sulfide
technologies for metal recovery and environmental remediation. Iron-reducing bacteria are one of the most important bacterial groups present in various environments
Dissimilatory iron reducing bacteria
Dissimilatory_iron_reducing_bacteria
Group of chemical compounds used as dye
the active ingredient in a Gram stain, used to classify bacteria. It is used as a pH indicator, with a range between 0 and 1.6. The protonated form (found
Methyl_violet
Count of cells, usually to detect mastitis and thus to assess milk quality
In dairying, the SCC is an indicator of the quality of milk—specifically, its low likeliness to contain harmful bacteria, and thus its high food safety
Somatic_cell_count
Type of bacteria growth
Filamentation is the anomalous growth of certain bacteria, such as Escherichia coli, in which cells continue to elongate but do not divide (no septa formation)
Filamentation
Study of microorganisms in soil
Fiona; Taylor, Matthew; Lear, Gavin (15 December 2016). "Bacteria as emerging indicators of soil condition". Applied and Environmental Microbiology
Soil_microbiology
Biological process to convert light into chemical energy
anoxygenic photosynthesis, which does not produce oxygen. Some bacteria (e.g. purple bacteria) use bacteriochlorophyll to split hydrogen sulfide as a reductant
Photosynthesis
Process of preserving foods with heat
contribute to food spoilage or the risk of disease, including vegetative bacteria, but most bacterial spores survive the process. Pasteurization is named
Pasteurization
Inflammation of the eyelid
lead to permanent alterations of the eyelid margin. The primary cause is bacteria and inflammation from congested meibomian oil glands at the base of each
Blepharitis
Whale excrement and its role in ocean ecology
ecology of the animal concerned. Feces have also provided information on the bacteria present in the gastro-intestinal tract of whales and dolphins. A 2016 research
Whale_feces
Thickening agent used in microbiology and food
experiments whereby bacteria with antibiotic-resistant plasmid are selected. In addition to antibiotic treated agar, other selective and indicator agar plates
Agar
Biochemical pathways used by microbes to satisfy energy needs
carbon dioxide. Examples: Nitrifying bacteria, sulfur-oxidizing bacteria, iron-oxidizing bacteria, Knallgas-bacteria photolithoautotrophs obtain energy
Microbial_metabolism
Separation of a strain from a mixed population of microbes
of gut bacteria, and phenol red in the agar acts as a ph indicator showing if the bacteria are able to ferment mannitol by excreting acid into the medium
Isolation_(microbiology)
Organism type
found in hydrothermal vents in the deep ocean and include some archaea and bacteria (unicellular organisms). Most chemoautotrophs are lithotrophs, using inorganic
Autotroph
Genus of bacteria
pollution, they can be considered as an indicator species. Beggiatoa and other related filamentous bacteria can cause settling problems in sewage treatment
Beggiatoa
Group of organisms
as moving, growth, and reproduction.[citation needed] Plants and some bacteria can alternate between phototrophy and chemotrophy, depending on the availability
Primary_nutritional_groups
Continuous range of values, such as wavelengths in physics
active against a wide range of bacteria, whereas a narrow-spectrum antibiotic is effective against specific families of bacteria. An example of a commonly
Spectrum
Triarylmethane dye
triarylmethane dye used as a histological stain and in Gram's method of classifying bacteria. Crystal violet has antibacterial, antifungal, and anthelmintic (vermicide)
Crystal_violet
Selective culture medium
the indicator phenol red. Sugar fermentation lowers the pH and the phenol red indicator registers this by changing to yellow. Most gut bacteria, including
XLD_agar
Biofilm of microorganisms that grows on teeth
Dental plaque is a biofilm of microorganisms (mostly bacteria, but also fungi) that grows on surfaces within the mouth. It is a sticky colorless deposit
Dental_plaque
Antibiotic medication
community-acquired pneumonia, pelvic infections, and diabetic foot infections, with bacteria that are susceptible to this drug, or expected to be so. It can also be
Ertapenem
Inflammation of membranes around the brain
be present. The inflammation may be caused by infection with viruses, bacteria, fungi or parasites. Non-infectious causes include malignancy (cancer)
Meningitis
Species of bacterium
individuals. B. thetaiotaomicron has been associated with other commensal bacteria and the induction of regulatory T cells, which are essential for maintaining
Bacteroides_thetaiotaomicron
Measure of dissolved or carried oxygen
bloodstream occupied by oxygen. Fish, invertebrates, plants, and aerobic bacteria all require oxygen. In aquatic environments, oxygen saturation is a ratio
Oxygen_saturation
Excessive growth of bacteria in the vagina
vaginosis (BV) is an infection of the vagina caused by excessive growth of bacteria. Common symptoms include increased vaginal discharge that often smells
Bacterial_vaginosis
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INDICATOR BACTERIA
INDICATOR BACTERIA
INDICATOR BACTERIA
INDICATOR BACTERIA
INDICATOR BACTERIA
INDICATOR BACTERIA
INDICATOR BACTERIA
INDICATOR BACTERIA
INDICATOR BACTERIA
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