Bartonella rochalimae Detection by a Sensitive and Specific PCR Platform.

Area of Science:

• * Veterinary Microbiology
• * Molecular Diagnostics
• * Infectious Diseases

Background:

• * Bartonella rochalimae is an emerging zoonotic pathogen with a global distribution.
• * Current molecular detection methods, including genus-specific polymerase chain reaction (PCR) and Sanger sequencing, can yield false-negative results for B. rochalimae due to cross-reactivity with other Bartonella species.
• * Accurate and sensitive detection is crucial for epidemiological studies and clinical diagnosis.

Purpose of the Study:

• * To develop a sensitive and specific quantitative PCR (qPCR) platform for the precise detection of Bartonella rochalimae.
• * To target specific genes (intergenic transcribed spacer, gltA, and rpoB) recommended for Bartonella subtyping.
• * To provide a reliable diagnostic tool for epidemiological surveillance and clinical management of B. rochalimae infections.

Main Methods:

• * Development of a novel qPCR assay targeting the intergenic transcribed spacer, gltA, and rpoB genes of B. rochalimae.
• * Evaluation of the assay's limit of detection (LOD) and specificity against a panel of Bartonella species and host DNA.
• * Validation of the qPCR platform for quantitative detection of B. rochalimae.

Main Results:

• * The developed qPCR platform demonstrated a high sensitivity with a limit of detection between 5 and 10 genomic equivalents per reaction.
• * The assay exhibited excellent specificity, showing no amplification of DNA from other Bartonella species or selected host organisms.
• * The qPCR platform provides accurate quantification of B. rochalimae DNA in samples.

Conclusions:

• * The novel qPCR assay offers a sensitive, specific, and reliable method for detecting and quantifying Bartonella rochalimae.
• * This platform overcomes limitations of previous PCR-based methods, reducing the risk of false-negative results.
• * The assay is a valuable, fast, and cost-effective tool for epidemiological investigations of Bartonella rochalimae reservoirs and vectors, as well as for diagnosing human infections.