Beta glucan is a very good immune enhancer but I think on its own it might not be enough. Given that you only have strongyloides and the protocol you will follow will work on eliminating them beta glucan will do its job too. If you have multiple parasites beta glucan will do nothing and eliminating strongyloides might not work either. If you got a positive Elisa that is good news on its own as most people with multiple infections never get a positive serum test simply because their immune system does not work anymore. So having a positive test is a good sign. Also natural foods contain beta glucan (of course less concentrated) such as oats for example. If you do not have malabsorption this could be a good addition to your diet. I hope you will get better.