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IdentityTop of page
Preferred Scientific Name
- Brucella abortus
Taxonomic TreeTop of page
- Domain: Bacteria
- Phylum: Proteobacteria
- Class: Alphaproteobacteria
- Order: Rhizobiales
- Family: Brucellaceae
- Genus: Brucella
- Species: Brucella abortus
Distribution TableTop of page
The distribution in this summary table is based on all the information available. When several references are cited, they may give conflicting information on the status. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report.Last updated: 10 Jan 2020
|Continent/Country/Region||Distribution||Last Reported||Origin||First Reported||Invasive||Reference||Notes|
|Egypt||Present||CABI Data Mining (2001)|
|Kenya||Present||CABI Data Mining (2001)|
|Nigeria||Present||CABI Data Mining (2001)|
|Tanzania||Present||CABI Data Mining (2001)|
|Uganda||Present||CABI Data Mining (2001)|
|Zimbabwe||Present||CABI Data Mining (2001)|
|India||Present||CABI Data Mining (2001)|
|-Andaman and Nicobar Islands||Present||CABI Data Mining (2001)|
|Iran||Present||CABI Data Mining (2001)|
|Pakistan||Present||CABI Data Mining (2001)|
|Sri Lanka||Present||CABI Data Mining (2001)|
|Turkey||Present||CABI Data Mining (2001)|
|Netherlands||Present||CABI Data Mining (2001)|
|Mexico||Present||CABI Data Mining (2001)|
|United States||Present||CABI Data Mining (2001)|
|New Zealand||Present||CABI Data Mining (2001)|
|Argentina||Present||CABI Data Mining (2001)|
|Brazil||Present||CABI Data Mining (2001)|
Pathogen CharacteristicsTop of page
The organism responsible for brucellosis is a small Gram-negative coccobacillus that is non-motile, non-encapsulated and non-spore-forming. In infected tissue it normally occurs singly or in small groups. The colonies are circular and 2-4 mm in diameter. Smooth colonies appear translucent, honey-coloured and bluish-green or unstained when stained with crystal violet. Rough colonies appear granular, reddish-yellow and deep violet-red when stained with crystal violet. Mucoid colonies are stringy and appear transparent, greyish and light bluish-red when stained with crystal violet.
Several commercial firms produce media suitable for the isolation of Brucella. On primary isolation it usually requires the addition of 5-10% carbon dioxide and takes 3-5 days incubation at 37° C for visible colonies to appear. Brucella abortus produces H2S. It usually grows in the presence of basic fuchsin, but not always in the presence of thionin at standard concentrations, and is catalase and oxidase positive. It is lyzed by brucella-phages Weybridge (Wb), Firenze (Fz), Tbilisi (Tb) and Berkeley (Bk).
Each Brucella has a specific oxidative metabolic pattern that can be used to determine the ability of an isolate to utilize oxygen on various amino acid and carbohydrate substrates. Currently there are eight recognized Brucella abortus biovars (Corbel et al., 1978; Ray, 1979).
Host AnimalsTop of page
|Animal name||Context||Life stage||System|
|Bos grunniens (yaks)||Domesticated host|
|Bos indicus (zebu)||Domesticated host, Wild host|
|Bos taurus (cattle)||Domesticated host, Wild host|
|Bubalus bubalis (Asian water buffalo)||Domesticated host, Wild host|
|Camelus dromedarius (dromedary camel)||Domesticated host|
|Canis familiaris (dogs)||Domesticated host, Wild host|
|Capra hircus (goats)||Domesticated host|
|Cavia porcellus (domesticated guinea pig)|
|Cervus elaphus (red deer)|
|Mus musculus (house mouse)|
|Ovis aries (sheep)||Domesticated host|
|Sus scrofa (pigs)|
Vectors and Intermediate HostsTop of page
Threatened SpeciesTop of page
Risk and Impact FactorsTop of page Impact mechanisms
- Pest and disease transmission
- Parasitism (incl. parasitoid)
ReferencesTop of page
Corbel MJ, Gill KPW, Thomas EL, 1978. Methods for the identification of Brucella. Tolcarne Drive, Pinner, Middlesex HA5 2DT, UK: Ministry of Agriculture, Fisheries and Food (Publications).
Gates CC, Stephenson RO, Reynolds HW, van Zyll de Jong CG, Schwantje H, Hoefs M, Nishi J, Cool N, Chisholm J, James A, Koonz B, 2001. National Recovery Plan for the Wood Bison (Bison bison athabascae). National Recovery Plant No. 21. Recovery of Nationally Endangered Wildlife (RENEW). Ottawa, Ontario, Canada: 50 pp.
Ray WC, 1979. Brucellosis (due to Brucella abortus and suis). In: Steele J, ed. Handbook Series in Zoonoses. Section A: Bacterial, Rickettial and Mycotic Diseases. Roca Raton, Florida, USA: CRC Press, Inc., 99-127.
CABI Data Mining, 2001. CAB Abstracts Data Mining.,
Distribution MapsTop of page
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