Species data

Common names

Name:

Crayfish, signal

Family:

Crayfishes

Name:

Freshwater crustacea

Latin names

Name:

Pacifastacus leniusculus

Family:

Astacidae

Name:

Reptantia

Diseases affected

Disease name	Occurance	Reference
Crayfish Plague	Experimental demonstration	Aphanomyces astaci isolate from latently infected stone crayfish (Austropotamobius torrentium) population is virulent
Crayfish Plague	Unknown	eDNA-based crayfish plague monitoring is superior to conventiional trap-based assessments in year-round detection probability
Crayfish Plague	Experimental demonstration	Exploring the eDNA dynamics of the host-pathogen pair Pacifastacus leniusculus (Decapoda) and Aphanomyces astaci (Saprolegniales) under experimental conditions
Crayfish Plague	Carrier not affected	Geographical spread of bacterial and fungal diseases of crustaceans.
Crayfish Plague	Natural occurrence	OIE Diagnostic Manual for Aquatic Animal Diseases (3rd edition).
Crayfish Plague	Unknown	Prevalence of the Crayfish Plague, Aphanomyces astaci Schikora, in Alien Crayfish Species in Japan
Crayfish Plague	Natural occurrence	Prevalence of the pathogen Aphanomyces astaci in freshwater crayfish populations in Croatia. The prevalence of Aphanomyces astaci in invasive signal crayfish from the UK and implications for native crayfish conservation. The signal crayfish (Pacifastacus leniusculus) in Lake Tahoe (USA) hosts multiple Aphanomyces species
Crayfish Plague	Unknown	The Spatial Distribution of Aphanomyces astaci Genotypes Across Europe: Introducing the First Data from Ukraine
White Spot Syndrome Virus	Experimental demonstration	Effect of water temperature on the immune response and infectivity pattern of white spot syndrome virus (WSSV) in freshwater crayfish. Experimental infection of white spot syndrome virus in freshwater crayfish Pacifasticus leniusculus.

Countries affected

Country	Reference
Finland	Aphanomyces astaci isolate from latently infected stone crayfish (Austropotamobius torrentium) population is virulent Chronic crayfish plague infection and eroded swimmeret syndrome in Lake Saimaa (Finland) signal crayfish
France	Status of Pacifastacus leniusculus and its role in recent crayfish plague outbreaks in France: improving distribution and crayfish plague infection patterns
Japan	Prevalence of the Crayfish Plague, Aphanomyces astaci Schikora, in Alien Crayfish Species in Japan
Norway	Crayfish plague (Aphanomyces astaci), Norway Crayfish plague (Aphanomyces astaci), Norway [Immediate notification, 21/10/13] Potent infection reservoir of crayfish plague now permanently established in Norway.
Ukraine	The Spatial Distribution of Aphanomyces astaci Genotypes Across Europe: Introducing the First Data from Ukraine
United Kingdom	Apparent interspecific transmission of Aphanomyces astaci from invasive signal to virile crayfish in a sympatric wild population The prevalence of Aphanomyces astaci in invasive signal crayfish from the UK and implications for native crayfish conservation.
United States of America	The signal crayfish (Pacifastacus leniusculus) in Lake Tahoe (USA) hosts multiple Aphanomyces species

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