ANNEX 2 
CATEGORY A PATHOGENS 
•k 
according to Report of the British Working Party 
CATEGORY A PATHOGENS 
Organisms so dangerous as to present great risks to the health either of laboratory 
workers or of the human or animal communities such that material containing live 
organisms should not be accepted knowingly or held at all in this country without 
authorisation. 
(i) Pathogens presenting hazards primarily or significantly to the human community. 
Viruses Herpes B virus of monkeys 
Lassa Fever virus 
Marburg virus 
Rabies virus 
Smallpox virus 
(ii) Pathogens presenting hazards primarily to animals. 
Viruses African Horsesickness virus 
African Swine Fever virus 
Bluetongue virus 
Equine Encephalomyelites group of viruses 
Foot and Mouth Disease virus 
Fowl Plague viruses 
Infectious Pancreatic Necrosis virus 
Infectious Haematopoietic Necrosis virus 
Japanese B virus 
Lumpyskin Disease virus 
Newcastle Disease virus 
Rift Valley Fever virus 
Rinderpest virus 
Saint Louis virus 
Sheep Pox virus 
Spring Viraemia virus 
Swine Fever virus 
Swine Vesicular Disease virus 
Teschen Disease virus 
Vesicular Exanthema virus 
Vesicular Stomatitis virus 
Viral Haemorrhagic Septicaemia virus 
Wesselsbron virus 
Bacteria Aeromonas salmonicida (Furunculosis) 
Flexibacler columnaris ( Chondrococcus columnaris ) 
Francisella tularensis 
Fungus Ffistoplasma farciminosum 
Protozoa Myxosoma ( Leniospura ) cerebratis (Whirling disease) 
Piroplasma Theilcria, all species 
Flagellates Trypanosoma cruzi (Chagas’ disease) 
Trypanosoma equiperdum 
Trypanosoma vivax 
Not Yet Classified Agent of Ulcerative Dermal Necrosis 
Agent of Erythrodermatitis 
* 
Report of the Working 
Pathogens, Cmnd. 6054, 
May 1975. 
Party on the Laboratory Use of Dangerous 
Her Majesty's Stationery Office, London, 
VI-14 
[ 476 ] 
