Abstract: Compositions and methods are provided for detection, diagnosis and prognosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) disease (COVID-19) and for characterization of SARS-CoV-2 antigen-specific T-cell immune responsiveness in COVID-19 patient samples, including in secondary in vitro immune response assays for long-lived anamnestic (memory) T-cell responses. Disclosed compositions and methods include a method that comprises contacting, in vitro, whole blood samples from subjects suspected of having COVID-19 or who have previously been exposed to SARS-CoV-2, with synthetic peptides comprising T-cell epitope-containing regions derived from SARS-CoV-2 Spike proteins; and indirectly detecting SARS-CoV-2-specific activated T-cells by determining production of a T-cell immune response indicator (e.g., interferon-?) in response to stimulation by the Spike protein-derived peptides.

Abstract: Methods for detecting an immune response to Mycobacterium tuberculosis are provided. Aspects of the methods include contacting a biological sample comprising T cells from a subject with at least one M. tuberculosis peptide and determining the presence of T cells in the biological sample that specifically recognize the amino acid sequence of the at least one peptide, wherein the presence of T cells that specifically recognize the amino acid sequence of the at least one peptide indicates the subject has an immune response to M. tuberculosis. In certain aspects, the methods of the present disclosure may include treating a subject identified as having an immune response to M. tuberculosis. Also provided are a skin test and immunoassay kits for practicing the disclosed methods.

Abstract: Compositions that include one isolated, class I HLA-E trimolecular complex that includes a peptide ligand unique to M. tuberculosis-infected cells are disclosed. Isolated compositions that include the three components of the trimolecular complex and/or a polynucleotide encoding one or more of the three components are also disclosed.

Abstract: Methods for producing an immune response to Mycobacterium tuberculosis (Mtb) are disclosed herein. In several examples, the immune response is a protective immune response. In additional embodiments, methods are disclosed for inhibiting an infection with Mtb, preventing an infection with Mtb, or treating an infection with Mtb. Pharmaceutical compositions for the inhibition, prevention and/or treatment of tuberculosis are also disclosed.

Abstract: Methods for producing an immune response to Mycobacterium tuberculosis (Mtb) are disclosed herein. In several examples, the immune response is a protective immune response. In additional embodiments, methods are disclosed for inhibiting an infection with Mtb, preventing an infection with Mtb, or treating an infection with Mtb. Pharmaceutical compositions for the inhibition, prevention and/or treatment of tuberculosis are also disclosed.

Abstract: Methods for producing an immune response to Mycobacterium tuberculosis (Mtb) are disclosed herein. In several examples, the immune response is a protective immune response. In additional embodiments, methods are disclosed for inhibiting an infection with Mtb, preventing an infection with Mtb, or treating an infection with Mtb. Pharmaceutical compositions for the inhibition, prevention and/or treatment of tuberculosis are also disclosed.

Abstract: Methods for detecting an infection with Mtb in a subject are disclosed. The methods include detecting the presence of CD8+ T cells that specifically recognize an Mtb polypeptide. The methods include in vitro assays for detecting the presence of CD8+ T cells in a biological sample, and in vivo assays that detect a delayed type hypersensitivity reaction. The methods also include detecting Mtb polypeptides and polynucleotides.

Abstract: Methods for detecting an infection with Mtb in a subject are disclosed. The methods include detecting the presence of CD8+ T cells that specifically recognize an Mtb polypeptide. The methods include in vitro assays for detecting the presence of CD8+ T cells in a biological sample, and in vivo assays that detect a delayed type hypersensitivity reaction. The methods also include detecting Mtb polypeptides and polynucleotides.

Abstract: Compositions that include at least one isolated, class I HLA trimolecular complex that includes a peptide ligand unique to M. tuberculosis-infected cells are disclosed. Isolated compositions that include the three components of the trimolecular complex and/or a polynucleotide encoding one or more of the three components are also disclosed.

Abstract: Methods for detecting an infection with Mycobacterium tuberculosis (Mtb) in a subject are disclosed. The methods include detecting the presence of CD8+ T cells that specifically recognize an Mtb polypeptide. The methods include in vitro assays for detecting the presence of CD8+ T cells in a biological sample, and in vivo assays that detect a delayed type hypersensitivity reaction. The methods can also include detecting Mtb polypeptides and polynucleotides. Reagents for the detection of an Mtb infection are also disclosed.

Abstract: Methods for producing an immune response to Mycobacterium tuberculosis (Mtb) are disclosed herein. In several examples, the immune response is a protective immune response. In additional embodiments, methods are disclosed for inhibiting an infection with Mtb, preventing an infection with Mtb, or treating an infection with Mtb. Pharmaceutical compositions for the inhibition, prevention and/or treatment of tuberculosis are also disclosed.

Abstract: Methods for detecting an infection with Mycobacterium tuberculosis (Mtb) in a subject are disclosed. The methods include detecting the presence of CD8+ T cells that specifically recognize an Mtb polypeptide. The methods include in vitro assays for detecting the presence of CD8+ T cells in a biological sample, and in vivo assays that detect a delayed type hypersensitivity reaction. The methods can also include detecting Mtb polypeptides and polynucleotides. Reagents for the detection of an Mtb infection are also disclosed.

Abstract: Methods for producing an immune response to Mycobacterium tuberculosis (Mtb) are disclosed herein. In several examples, the immune response is a protective immune response. In additional embodiments, methods are disclosed for inhibiting an infection with Mtb, preventing an infection with Mtb, or treating an infection with Mtb. Pharmaceutical compositions for the inhibition, prevention and/or treatment of tuberculosis are also disclosed.

Abstract: Methods for detecting an infection with Mycobacterium tuberculosis (Mtb) in a subject are disclosed, wherein the subject is a child, a subject with a latent Mycobacterium tuberculosis infection. Method are also disclose for detecting an extra-pulmonary Mycobacterium tuberculosis infection in a subject. The methods include detecting the presence of CD8+ T cells that specifically recognize an Mtb polypeptide. The methods include in vitro assays for detecting the presence of CD8+ T cells in a biological sample.

Abstract: Methods for producing an immune response to Mycobacterium tuberculosis (Mtb) are disclosed herein. In several examples, the immune response is a protective immune response. In additional embodiments, methods are disclosed for preventing an infection with Mtb, or treating an infection with Mtb. Pharmaceutical compositions for the prevention and/or treatment of tuberculosis are also disclosed.

Abstract: Methods for detecting an infection with Mycobacterium tuberculosis (Mtb) in a subject are disclosed. The methods include detecting the presence of CD8+ T cells that specifically recognize an Mtb polypeptide. The methods include in vitro assays for detecting the presence of CD8+ T cells in a biological sample, and in vivo assays that detect a delayed type hypersensitivity reaction. The methods can also include detecting Mtb polypeptides and polynucleotides. Reagents for the detection of an Mtb infection are also disclosed.

Abstract: Methods for detecting an infection with Mtb in a subject are disclosed. The methods include detecting the presence of CD8+ T cells that specifically recognize an Mtb polypeptide. The methods include in vitro assays for detecting the presence of CD8+ T cells in a biological sample, and in vivo assays that detect a delayed type hypersensitivity reaction. The methods also include detecting Mtb polypeptides and polynucleotides.

Abstract: Methods for producing an immune response to Mycobacterium tuberculosis (Mtb) are disclosed herein. In several examples, the immune response is a protective immune response. In additional embodiments, methods are disclosed for inhibiting an infection with Mtb, preventing an infection with Mtb, or treating an infection with Mtb. Pharmaceutical compositions for the inhibition, prevention and/or treatment of tuberculosis are also disclosed.

Abstract: Methods for producing an immune response to Mycobacterium tuberculosis (Mtb) are disclosed herein. In several examples, the immune response is a protective immune response. In additional embodiments, methods are disclosed for preventing an infection with Mtb, or treating an infection with Mtb. Pharmaceutical compositions for the prevention and/or treatment of tuberculosis are also disclosed.

Abstract: Methods for producing an immune response to Mycobacterium tuberculosis (Mtb) are disclosed herein. In several examples, the immune response is a protective immune response. In additional embodiments, methods are disclosed for preventing an infection with Mtb, or treating an infection with Mtb. Pharmaceutical compositions for the prevention and/or treatment of tuberculosis are also disclosed.