Alternaria tenuissima

Alternaria tenuissima
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Ascomycota
Class:	Dothideomycetes
Order:	Pleosporales
Family:	Pleosporaceae
Genus:	Alternaria
Species:	A. tenuissima
Binomial name
	Alternaria tenuissima; Samuel Paul Wiltshire (1933)
Synonyms
	Helminthosporium tenuissimum Christian Gottfried Daniel Nees von Esenbeck (1817); Macrosporium tenuissimum Christian Gottfried Daniel Nees von Esenbeck and Elias Magnus Fries (1832); Macrosporium maydis Mordecai Cubitt Cooke and Job Bicknell Ellis (1878); Clasterosporium tenuissimum Christian Gottfried Daniel Nees von Esenbeck and Pier Andrea Saccardo (1886);

Alternaria tenuissima is a saprophytic fungus and opportunistic plant pathogen. It is cosmopolitan in distribution, and can colonize a wide range of plant hosts.^[1] Colonies of A. tenuissima produce chains on agar growth media.^[1] The fungus often forms concentric ring patterns on infected plant leaves.^[2] This species produces the allergen Alt a 1, one of the most important outdoor seasonal fungal allergens associated with allergy and asthma provocation.^[3] In rare circumstances, this species is also known to infect immunosuppressed humans and animals.^[4]

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