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Record information and status
Record ID
Date of creation
2019-08-16 19:05 UTC (austein.mcloughlin@cbd.int)
Date of last update
2020-06-30 13:29 UTC (austein.mcloughlin@cbd.int)
Date of publication
2020-06-30 13:29 UTC (austein.mcloughlin@cbd.int)

Organism information
Scientific name
Ugandan cassava brown streak virus
Taxonomic Classification
SpeciesUgandan cassava brown streak virus
Common name(s)
Additional Classification
Group (virus)
Group IV (+ssRNA)
Type of organism
  • Viruses
Characteristics related to biosafety
Centre(s) of origin
The first reported incidence of Cassava brown streak disease was in Northeastern Tanzania in 1936.
Geographical distribution
The virus can be found in cassava growing regions of central and eastern Africa.
Known pathogenicity and/or allergenicity
The virus infects mature (or nearly mature) leaves and characteristically causes chlorotic or necrotic vein banding. Dark, necrotic lesions appear within the tuber tissue and lead to post-harvest spoilage. Lesions can also sometimes appear on young (green) stems, but this is uncommon. Disease symptoms vary greatly and are influenced strongly by environmental conditions.

The virus is transmitted mechanically via cuttings. Whiteflies (Bemisia tabaci) have also been suggest as a vector for viral transmission.
Common use(s)
  • Research
  • Phytopathogen
Additional Information
Additional Information
Ugandan cassava brown streak virus (UCBSV) is a monopartite, (positive) single stranded RNA virus consisting of around 9050 nucleotides and a poly-A tail. The viral genome is encapsulated by the 43 kiloDalton coat protein. UCBSV contains a similar arrangement to the Cassava brown streak viral genome.

Please note that UCBSV is closely related to Cassava brown streak virus (CBSV), which are the causal agents in Cassava Brown Streak Disease in cassava. The symptoms are similar between the two viruses. However, CBSV infects cassava more readily than UCBSV and causes more severe symptoms.

Records referencing this document (1)
1record(s) found
Gene and DNA Sequence1 record