Serological variability in Xanthomonas albilineans, causal agent of leaf scald disease of sugarcane

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Abstract
The serological characteristics of 215 strains of Xanthomonas albilineans from 28 locations throughout the world were investigated. Three serovars were identified by using three sera prepared against strains from different locations. The same variation among strains was observed with different serological assays: immunofluorescence. dot‐blot enzyme immunoassay and agglutination. Serovar I is the largest group and consists of strains from various geographic locations such as Australia. USA (Florida), Guadeloupe. India. Mauritius. Réunion and including South Africa. Serovar II contains only strains from Africa: Burkina Faso. Cameroon. Kenya. Ivory Coast. Serovar III is the smallest group and contains strains from Caribbean islands (Guadeloupe. Saint Kitts. Martinique). Oceania (Fiji) and Asia (Sri Lanka). This serological variability should be considered when serological techniques are applied for the diagnosis of leaf‐scald disease of sugarcane.