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Pseudomonas tolaasii
Scientific classification
Kingdom:	Bacteria;
Phylum:	Proteobacteria;
Class:	Gamma Proteobacteria;
Order:	Pseudomonadales;
Family:	Pseudomonadaceae;
Genus:	Pseudomonas;
Species:	P. tolaasii;
Binomial name
	Pseudomonas tolaasii; Paine 1919
Type strain
	ATCC 33618; CCUG 23369 and 32782; CFBP 2068; CIP 106735; ICMP 12883; JCM 21583; LMG 2342; NCPPB 2192

Pseudomonas tolaasii is a species of Gram-negative soil bacteria that is the causal agent of bacterial blotch on cultivated mushrooms (Agaricus bisporus)^[1]. It is known to produce a toxin, called tolaasin, which is responsible for the brown blotches associated with the disease^[2]. It also demonstrates hemolytic activity, causing lysis of erythrocytes^[3]. Based on 16S rRNA analysis, P. tolaasii has been placed in the P. fluorescens group^[4].

[edit] References

^ Brodey, et al. (1991). "Bacterial blotch disease of the cultivated mushroom is caused by an ion channel forming lipodepsipeptide toxin". Molecular Plant Microbe Interactions 1: 407–411. doi:10.1094/MPMI-4-407.
^ Soler-Rivas, et al. (1999). "Biochemical and physiological aspects of brown blotch disease of Agaricus bisporus.". FEMS Microbiol Reviews 23: 591–614. doi:10.1111/j.1574-6976.1999.tb00415.x. PMID 10525168.
^ Munsch P, Alatossava T. (2002). "Several pseudomonads, associated with the cultivated mushrooms Agaricus bisporus or Pleurotus sp., are hemolytic". Microbiol Res 157: 311–315. doi:10.1078/0944-5013-00159. PMID 12501995.
^ Anzai, et al. (2000, Jul). "Phylogenetic affiliation of the pseudomonads based on 16S rRNA sequence". Int J Syst Evol Microbiol 50 (Pt 4): 1563–89. PMID 10939664.

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