1. Abbreviation for Certified Registered Nurse Practitioner. The definition information for CRNP is provided by Stedman's. You can search our medical dictionary here.he definition information for CRNP is provided by Stedman's. You can search our medical dictionary here.
1 Other symptoms include fever, chills, nausea, vomiting, muscle aches and hemolytic anemia (a condition where the red blood cells are destroyed).  People bitten by an unseen spider sometimes blame the brown recluse spider because their bite resembles a brown recluse spider bite.
Widow spider envenomations are graded as mild, moderate, or severe. 1  Mild: Pain restricted to the bite site, normal vital signs. 2  Moderate: Diaphoresis and piloerection in the area of the bite, cramping pain in large muscle groups of the trunk, normal vital signs.