Disclosed are vaccines and vaccine adjuvants useful in the treatment and/or prevention of infection and diseases associated with infectious pathogens, such as tetanus, as well as diseases associated with biological toxins. Also provided are methods of preparing an adjuvant and the vaccine containing the adjuvant. Methods are also provided for vaccinating/immunizing an animal against infection and diseases associated with infectious pathogens, such as tetanus, and other diseases associated with biological toxins. Adjuvant materials are presented that are prepared from an extracellular matrix material. The adjuvant may also be described as a heterologous acellular collagenous tissue preparation. The adjuvants are demonstrated to enhance the immunogencity of an infectious pathogen antigen or biological toxin antigen of interest, as well as to enhance the survival of an immunized animal.