Effects of TNX-832 (Sunol cH36) in Subjects With Acute Lung Injury/Acute Respiratory Distress Syndrome

Inclusion Criteria: 1. ≥ 18 years 2. Suspected or proven bacterial infection 3. Receiving positive pressure ventilation through an endotracheal tube 4. Have ALI/ARDS, defined as having all of the following: * bilateral infiltrates consistent with pulmonary edema * Hypoxemia * no clinical evidence of left atrial hypertension 5. Provide signed informed consent Exclusion Criteria: 1. Mechanically or chemically-induced ALI/ARDS (including burns, trauma, and near drowning) 2. End-stage lung disease 3. Decompensated congestive heart failure 4. Authorization to withdraw life support 5. Hemoglobin persistently \<8.0 g/dL 6. Subjects who have any one of the following: * platelet count \<50,000/mm\^3 * prolonged prothrombin time (PT) * prolonged activated partial thromboplastin time (aPTT) * having significant potential for disseminated intravascular coagulation (DIC) 7. Subjects who have two or more of the following: * prolonged aPTT * fibrinogen level below the lower limit of normal * presence of petechiae, ecchymoses, or other evidence of coagulopathy 8. Subjects who have a history of one or more of the following: * hematuria (microscopic or gross) * urinary tract neoplasia * nephrolithiasis * glomerulonephritis * active urinary tract infection (UTI) 9. Bleeding disorders within the past 6 weeks or vasculitis with diffused alveolar hemorrhage 10. Diagnosis of bleeding peptic ulcer disease within the previous 2 months 11. Congenital bleeding diatheses such as hemophilia 12. Treatment with anti-platelet, anti-coagulant agents, or non-steroidal anti-inflammatory drugs (NSAIDs)within 72 hours following infusion of study drug * Therapeutic heparin: * Unfractionated heparin within eight hours prior to study drug infusion * Low molecular weight heparins within the 12 hours prior to study drug infusion * Prophylactic heparin: * Unfractionated heparin \>15,000 units/day * Low molecular weight heparins * Warfarin if used within 7 days prior to study drug infusion * Thrombolytic treatment within 3 days prior to study drug infusion * 8Glycoprotein IIb/IIIa antagonists within 7 days prior to study drug infusion * Aspirin or any aspirin containing compound within 3 days prior to study drug infusion * APC infusion within 72 hours prior to study drug infusion 13. Major trauma or trauma subjects at an increased risk of bleeding 14. History of severe head trauma that required hospitalization, intracranial surgery, or stroke or any history of intracerebral arteriovenous malformation, cerebral aneurysm, or central nervous system mass lesion with an epidural catheter or who anticipate receiving an epidural catheter during study drug infusion 15. Major surgery within the previous 3 days, any postoperative subject with evidence of active bleeding, or any subject with planned or anticipated surgery within 72 hours after study drug infusion. History of abnormal bleeding during surgical procedures 16. Chronic renal failure, defined as a calculated glomerular filtration rate (GFR) ≤20 mL/min 17. Subjects with baseline aspartate transaminase (AST) or alanine transaminase (ALT) level \>5 times the upper limit of normal. Subjects with known esophageal varices, chronic jaundice, biopsy proven cirrhosis, or chronic ascites 18. History of organ transplant (including bone marrow) 19. Subjects with malignancy having a life expectancy \<6 months 20. Known human immunodeficiency virus (HIV) positive with CD4+ T Cell count \<200/uL 21. Women who are pregnant or nursing 22. Participation in another clinical research study within 30 days before administration of study drug, with the exception of participation in studies involving noninvasive monitoring medical devices 23. Any prior treatment with a murine or chimeric antibody 24. Subjects who are moribund and where death is perceived to be imminent (within 72 hours after screening) 25. Subjects who have persistent hypotension not responding to fluid or vasopressor administration; subjects who require more than two vasopressors 26. Any medical condition which in the opinion of the investigator would interfere with optimal participation in the study or that would produce a significant risk to a subject