Safety and Efficacy of Combination Listeria/GVAX Pancreas Vaccine in the Pancreatic Cancer Setting

Inclusion Criteria: * Have histologically proven malignant adenocarcinoma of the pancreas; measurable disease is not required, mixed histology is not allowed; subjects must have metastatic disease * 2nd line, 3rd line or greater * At least 18 years of age * Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1 * Anticipated life expectancy \>12 weeks * For women and men of childbearing potential, a medically acceptable method of highly effective contraception (oral hormonal contraceptive, condom plus spermicide, or hormone implants) must be used throughout the study period and for 28 days after their final vaccine administration. A barrier method of contraception must be employed by all subjects (male and female), regardless of other methods. * Have adequate organ function as defined by specified laboratory values Exclusion Criteria: * Allergy to both penicillin \& sulfa or suspected hypersensitivity to granulocyte-macrophage colony stimulating factor (GM-CSF), dimethyl sulfoxide, fetal bovine serum, trypsin, yeast, glycerol or other component of the therapy options * Known history or evidence of brain metastases, immunodeficiency disease or immunocompromised state or history of autoimmune disease requiring systemic steroids or other immunosuppressive treatment * Have any evidence of hepatic cirrhosis or clinical or radiographic ascites * Have prosthetic heart valves, major implant or device placed in the last 12 months or history of infection with implant/device that cannot be easily removed * Rapidly progressing disease * Clinically significant and/or malignant pleural effusion * Received prior GVAX pancreas vaccine or CRS-207 * Major surgery or significant traumatic injury (or unhealed surgical wounds) occurring within 28 days prior to receiving study drug, or planned surgery requiring general anesthesia * Infection with HIV or hepatitis B or C at screening * Valvular heart disease that requires antibiotic prophylaxis for prevention of endocarditis * Pregnant or breastfeeding * Unable to avoid close contact with another individual known to be at high risk of listeriosis (e.g., newborn infant, pregnant woman, HIV-positive individual) during the course of CRS-207 treatment until completion of antibiotic regimen * Conditions, including alcohol or drug dependence, intercurrent illness, or lack of sufficient peripheral venous access, that would affect the patient's ability to comply with study visits and procedures