Bacteria, Fungi and Viruses - Sizes and Significance
(Sizes in Micrometers - MM)



100% Montmorillonite Clay

Barbs Wellness LLC
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Professional Water Test Available

Note: Most are above 0.1M in size. None are below 0.01 in size.

OrganismMicrobial GroupRod Length µmRod or Coccus Diameter µm Source Significance
Absidia corymbiferaFungi3.8Environmental Zygomycosis
Acetobacter MelanogenusBacteria1.0-2.00.4-0.8 Strong beer/vinegar bacterium.
AcinetobacterBacteria1.3Environmental Opportunistic infections
Acremonium spp.Fungi2.5Environmental Extrinsic Allergic Aveons
Actinomyces israeliiBacteria1.0Humans Antinomycosis
AdenovirusVirus0.08Humans Colds
Alcaligenes ViscolactisBacteria0.8-2.60.6-1.0 Causes ropiness in milk.
AlkaligenesBacteria0.75Humans Opportunistic infections
Alternaria alternataFungi14.4Environmental Mycotoxicosis
ArenavirusVirus0.18Rodents Hemorrhagic fever
Aspergillis spp.Fungi3.5Environmental Aspergillosis, Volatile Organic Compound
Aureobasidium pullulansFungi5Environmental Chromomycosis
Bacillus anthracisBacteria3.0-10.01.0-1.3(1.1 average)Environmental Causes anthrax in mammals
Bacillus StearothermophilusBacteria2.0-5.00.6-1.0 Biological indicator for steam sterilization
Bacillus subtilisBacteria2.0-3.00.7-0.8 Biological indicator for ethylene oxide sterilization
Blastomyces dermatiitidisFungi14Environmental Blastomycosis
Bordetella pertussisBacteria0.25Humans Whooping cough
Botrytis cineraFungi7Environmental Extrinsic Allergic Aveons
CardiobacteriumBacteria0.63Humans Opportunistic infections
Chaetomium globosumFungi5.5Environmental Chromomycosis, Volatile Organic Compound
Chiamydia psittaciBacteria0.3Birds Psittacosis
Chlamydia pneumoiaeVirus0.3Humans Pneumonia
Cladosporium spp.Fungi9Environmental Chromblastomycosis
Clostridium botulinumBacteria 3.0-8.00.5-0.8 Produces exotin causes botulism
Clostridium PerinngensBacteria4.0-8.01.0-1.5 Produces toxin causing food poisoning
Clostridium tetaniBacteria4.0-8.00.4-0.6 Produces exotoxin causing tetanus
Coccidioides immitisFungi4Environmental Coccidiodomycosis
CoronavirusVirus0.11Humans Colds
Corynebacteria diphtheriaBacteria1.0Humans Diphtheria
Coxiella burnetiiBacteria0.5Cattle, sheep Q fever
CoxsackievirusVirus0.027Humans Colds
Cryptococcus neoformansFungi5.5Environmental Cryptococcosis
Diplococcus PneumoniaeBacteria0.5-1.25 Causes lobar pneumonia
EchovirusVirus0.028Humans Colds
Emericella nidulansFungi3.3Environmental Mycotoxicosis, Volatile Organic Compound
Epicoccum nigrumFungi20Environmental Extrinsic Allergic Aveons
Erwina aroideaeBacteria2.0-3.00.5 Causes soft rot in vegetables.
Escherichia collBacteria1.0-3.00.5 Indicator of fecal contamination in water
Eurotium spp.Fungi5.8Environmental Extrinsic Allergic Aveons
Exophiala jeanselmeiFungi2Environmental Chromomycosis
Francisella tularensisBacteria 0.2Wild animals Tularemia
Geomyces pannorumFungi3Environmental Extrinsic Allergic Aveons
Haemophilus influenzaeBacteria0.5-2.00.2-0.3 Causes influenza and acute respiratory infections
Haemophilus influenzaeBacteria0.43Humans Meningitis, pneumonia
Haemophilus parainfluenzaeBacteria1Humans Opportunistic infections
HantavirusVirus0.07Rodents Hantavirus
HelminthosporiumFungi12.5Environmental Extrinsic Allergic Aveons
Histoplasma capsulatumFungi3Environmental Histoplasmosis
InfluenzaVirus50.4-0.5Humans, birds Flu
Klebsielia pneumoniaeBacteria5 Opportunistic infections, causes pneumonia and other respiratory inflammation
Lactobacillus DelbrueckilBacteria2.0-9.00.5-0.8 Causes souring of grain-mashes
Legionella pneumophiaBacteria0.6Environmental Pontiac fever
Micromonospora faeniActinomycetes1Agricultural Farmers' lung, Hypersensitivity Pneumonitis
Moraxella catarrhalisBacteria1.3Humans Opportunistic infections
Moraxella lacunataBacteria1Humans Opportunistic infections
MorbillvirusVirus0.12Humans Measles (rubeola)
Mucor plumbeusFungi7.5Environmental Mucormycosis
Mycobacterium aviumBacteria1.2Environmental Cavitary pulmonary disorder
Mycobacterium intracellulareBacteria1.2Unknown Cavitary pulmonary disorder
Mycobacterium kansasliBacteria.86Humans Cavitary pulmonary disorder
Mycobacterium TuberculosisBacteria1.0-4.00.2-0.5(0.86 average)Humans Hard swelling of body tissues. TB
Mycoplasma pneumoniaeBacteria0.25Humans Pneumonia
Mycoplasma pneumoniae (PPLO)Bacteria0.3-0.5 Smallest known free-living organism
Neisseria meningitidisBacteria0.8Humans Meningitis
Nocardia BrasilensisActinomycetes1.1Environmental Nocardiosis
Paecilomyces variotiiFungi3Environmental Mucormycosis
Paracoccidioides brasilensisFungi2.3Environmental Paracoccidioidomycosis
ParainfluenzaVirus0.22Humans Flu
ParamyxovirusVirus0.23Humans Mumps
Parvovirus B19Virus0.022Humans Filth disease,anemia
Pediococcus acidilactciBacteria0.6-1.0 Causes mash spoilage in brewing
Pediococcus CerevisiaeBacteria1.0-1.3 Causes deterioration in beer
Penicillium spp.Fungi3.3Environmental Mycotoxicosis, Volatile Organic Compound
Phialophora spp.Fungi1.5Environmental Chromomycosis
Phoma sppFungi3.3Environmental Mucormycosis
Pneumocystis cariniiBacteria2Environmental Pneumocystosis
Poxvirus - VacciniaVirus0.23Agricultural Cowpox
Pseudomonas aeruginosaBacteria0.57Environmental Opportunistic infections
Pseudomonas malleiBacteria0.77Environmental Opportunistic infections
Pseudomonas pseudomalleiBacteria0.57Environmental Opportunistic infections
Pseudormonas diminutaBacteria1.0 0.3 Test organism for retention 0.2 µm membranes
RhinorvirusVirus0.023Humans Colds
Rhizopus stoloniferFungi.8Environmental Zygomycosis
Rhodoturula spp.Fungi1.4Environmental Extrinsic Allergic Aveons
Salmonella enteritidisBacteria2.0-3.00.6-0.7 Causes food poisoning
Salmonella hirschefeldiiBacteria1.0-2.50.3-0.5 Causes enteric fever
Salmonella typhimuriumBacteria1.0-1.5 0.5 Causes food poisoning in man
Salmonella typhosaBacteria2.0-3.00.6-0.7 Causes typhoid fever
Sarcina maximaBacteria4.0-4.5 Isolated from fermenting malt mash
Scopulariopsis spp.Fungi6Environmental Onychomycosis
Serratia marcescensBacteria0.5-1.00.5 Test organism for retention of 0.45 µm membranes
Serratia marcescensBacteria 1.3Environmental Opportunistic infections
Shigella dysenteriaeBacteria1.0-3.00.4-0.6 Causes dysentery in man
Sporothrix schenckiiFungi6.5Environmental Sporotrichosis
Stachybotrys spp.Fungi5.7Environmental Stachybotryotoxicosis
Staphylococcus AureusBacteria0.8-1.0Humans Causes pus forming infections, opportunistic infections
Streptoccous lactisBacteria0.5-1.0 Contaminant in milk
Streptococcus pneumoniaeBacteria0.9Humans Pneumonia, otitis media
Streptococcus pyogenesBacteria0.6-1.0(0.9 averageHumans Causes pus forming infections, scarlet fever, pharyngitis
Thermoactinomyces sacchariActinomycetes0.86Agricultural Bagassosis
Thermoactinomyces vulgarisActinomycetes1Agricultural Farmers' lung, Hypersensitivity Pneumonitis
Thermomonspora viridisActinomycetes0.6Agricultural Farmers' lung, Hypersensitivity Pneumonitis
TogavirusVirus0.063Humans Rubella (german measles)
Trichoderma spp.Fungi4.1Environmental Mycotoxicosis, Volatile Organic Compound
Ulociadium spp.Fungi15Environmental Extrinsic Allergic Aveons
Varicella-zosterVirus0.3Humans Chickenpox
Wallemia sebiFungi3Environmental Extrinsic Allergic Aveons
Yersinia pestisVirus0.75Humans Pheumonic plague

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