Cajun Shrimp Alfredo

Name: Cajun Shrimp Alfredo
Ingredients: 1 pound andouille sausage, diced; 2 tablespoons olive oil; 1 medium onion, chopped; 3 garlic cloves, minced; 1 tablespoon red pepper flakes; 8 tablespoons worcestershire sauce; 1 cup milk; 2 cups half and half; 3 tablespoons Cajun or Creole seasoning; 1 teaspoon chili powder; 1 stick butter; 1 cup parmesan cheese, grated; 1 pound raw shrimp, peeled and deveined; 1 pound long pasta of your choice