Re: I wonder if worcestershire sause has much value to kill parasites?

According to its ingredients, I'd say yes:

The ingredients of a traditional bottle of Worcestershire sauce sold in the UK as "The Original & Genuine Lea & Perrins Worcestershire sauce" are malt vinegar (from barley), spirit vinegar, molasses, sugar, salt, anchovies, tamarind extract, onions, garlic, spice, and flavouring.[9] The "spice, and flavouring" is believed to include cloves, soy sauce, lemons, pickles and peppers.[9 Tweet