A new variant of Brucella melitensis

• Published in: Clinical microbiology and infection Vol. 12; no. 6; pp. 593 - 596
• Main Authors: Lucero, N.E., Ayala, S.M., Escobar, G.I., Grayon, M., Jacques, I.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Elsevier Ltd 01.06.2006; Blackwell Publishing Ltd; Blackwell; Elsevier for the European Society of Clinical Microbiology and Infectious Diseases
• Subjects: Adolescent; Adult; Bacterial Typing Techniques - methods; Biological and medical sciences; Brucella melitensis; Brucella melitensis - classification; Brucella melitensis - drug effects; Brucella melitensis - genetics; Brucella melitensis - isolation & purification; Brucellosis - microbiology; Child; Child, Preschool; Female; Humans; identification; Infectious diseases; Life Sciences; Male; Medical sciences; Microbial Sensitivity Tests; Penicillins - pharmacology; phenotypic characteristics; Polymerase Chain Reaction - methods; Polymorphism, Restriction Fragment Length; Rev.1 vaccine; variant; variant; identification; Rev.1 vaccine; phenotypic characteristics; Brucella melitensis; Characteristic; Identification; Vaccine; Infection; Prevention; Immunoprophylaxis; Phenotype; Brucellaceae; Bacteria; REV.1 VACCINE; BRUCELLA MELITENSIS; PHENOTYPIC CHARACTERISTICS; IDENTIFICATION; VARIANT
• ISSN: 1198-743X; 1469-0691
• DOI: 10.1111/j.1469-0691.2006.01386.x

Brucella melitensis is highly pathogenic and constitutes a serious risk to public health. In Argentina, biovar 1 has been isolated from infected animals, but the Rev.1 strain vaccine is not authorised for use. This report describes nine atypical B. melitensis isolates obtained from humans. These isolates grew slowly, produced small colonies and were susceptible to penicillin and dyes, similar to the B. melitensis Rev.1 vaccine strain, but were inhibited by streptomycin 2.5 mg/L. The isolation of such atypical B. melitensis variants has never been reported from animals in Argentina, and could indicate the emergence of a new mutant variant.