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CDC researchers have developed a multiplexed diagnostic assay for sensitive detection and distinction between viral group members based on the presence/absence of infection-generated antibodies within a clinical serum sample. For example, this assay can be used for rapid discrimination of a clinical unknown as specifically a West Nile or St. Louis encephalitis viral infection. This is particularly beneficial as these two viruses are typically difficult to distinguish by standard serological assays.

This new technique uses microsphere/microbead-based flow-analysis as a platform.

A quantitative RT-PCR-based assay has been developed to rapidly detect all known strains of Rift Valley fever virus (RVFV). RVFV infections occur in both humans and livestock animals resulting in significant mortality and economic loss. Upon outbreak, RVFV has been known to cause devastating loss among livestock (primarily sheep and cattle) with outbreaks characterized by sweeping "abortion storms" and elevation newborn animal mortality approaching 100% in affected areas. The CDC-developed assay is capable of detecting and quantifying RVFV infection in both human and veterinary samples.

CDC researchers have developed an assay for detection and diagnosis of poxviruses within clinical samples or from lab culture-systems. The assay specifically targets chordopoxviruses (except avipoxviruses) for PCR-based identification; an improvement upon the current standard of cell culturing methodologies. Individual chordopoxvirus species can cause disease in humans (e.g., vaccinia, cowpox, monkeypox/Molluscum contagiosum) and animals (e.g., sheeppox, myxoma, swinepox, mule deer pox, tanapox/Orf virus, Bovine popular stomatitis virus).

This invention provides a rapid, sensitive and specific diagnostic tool for the detection of pathogenic fungi and subsequent species-specific discrimination. CDC scientists have developed nucleic acid probes to identify the six most medically important Candida species and endemic mycoses, and to differentiate them from other medically important fungi in a multi-analyte profiling system.

CDC researchers have characterized epitopes of Bacillus anthracis Lethal Factor (LF), a critical component of the B. anthracis lethal toxin. These epitopes may allow for development of therapeutics for the treatment or prevention of B. anthracis infection. They may also allow screening for B. anthracis LF in a sample and development of a peptide anthrax vaccine.

This invention relates to recombinant Rift Valley fever (RVF) viruses containing deletions in one or more virulence genes. The recombinant RVF viruses, generated using a plasmid-based reverse genetics system, can be used as vaccines to prevent RVF infection in livestock and humans. The recombinant RVF viruses grow to high titers, provide protective immunity following a single injection, and allow for the differentiation between vaccinated animals and animals infected with wild-type RVF virus.

This invention pertains to nucleic acid-based assays for the detection of Aspergillus and other filamentous fungi. Assays cover the species-specific detection and diagnosis of infection by Aspergillus, Fusarium, Mucor, Penecillium, Rhizomucor, Absidia, Cunninghamella, Pseudallescheria or Sporthrix in a subject. This can reduce identification time from several days by conventional culture methods to a matter of hours.

This invention, entailsnucleic acid-based assays, for detecting the presence of pathogenic fungi such as Histoplasma capsulatum, Blastomyces dermatitidis, Coccidioides immitis, Pneumocystis brasiliensis, and/or Penicillium marneffei within a sample. Within a healthcare setting, this particular approach can greatly reduce pathogen identification time, better direct treatments and ultimately improve patient outcomes.

This invention relates to assays for the detection and species-specific identification of Aspergillus fungi. Accurate clinical diagnosis of Aspergillus species has become increasingly important as certain species, such as A. terreus and A. fumigatus, are resistant to specific commonly employed antifungal compounds. Most contemporary fungal diagnostic methods are time-consuming and inaccurate.

This invention pertains to the development of oligonucleotides for the rapid nucleic acid-based identification of Candida or Aspergillus fungi species in biological samples. This identification is accomplished by the targeting the internally transcribed spacer-2 (ITS2) region that are unique to various Candida species. The assay is sensitive, specific and rapid. Implementation of the technology will facilitate earlier specific diagnoses, and lead to better antifungal therapy implementation for infected patients.