Abstract: The present invention provides a method for the treatment and/or prevention of bacterial infection in central nervous system and/or peripheral blood circulation in a mammal by administering effective amount of outer membrane protein A (OmpA) or its derivatives to a mammal. Also provided is an antibody binding to OmpA that can assay OmpA levels in a biological sample and detect or diagnose bacterial infection in central nervous system and/or peripheral blood circulation.

Abstract: The present invention provides a method for the treatment and/or prevention of bacterial infection caused by klebsiella pneumoniae and other gram-negative bacteria in central nervous system and/or peripheral blood circulation in a mammal by administering effective amount of outer membrane protein A (OmpA) or its derivatives to a mammal. Also provided are a method for vaccinating a mammal to produce an antibody against bacterial infection caused by Enterobacteriaceae family in central nervous system and/or peripheral blood circulation and a method of detecting or diagnosing bacterial infections caused by Enterobacteriaceae family in central nervous system and/or peripheral blood circulation in a mammal.

Abstract: This invention relates to a method of monitoring cancer development by determining the abundance of alpha-enolase protein wherein increased abundance is an indication of the severity of cancer. In another embodiment, the invention relates to a method of detecting cancer malignancy by determining the abundance of alpha-enolase antibodies in a sample wherein low levels of such antibodies indicates the malignancy of cancer. Also provided is a method of suppressing tumor growth by inducing the anti-ENO1 immune response.