Can HIV lead to severe complications with scabies infestation?

Possibly. Scabies in and of itself is a fairly easily treatable infection, however, in HIV + population, especially those who have aids, the immune system may be seriously compromised to fight the mite and the infection that is setting in due to the inflammation it is producing. This all may lead to complicated cases of skin infection and even generalization of such with unpredictable outcomes.
Scabies. While scabies is not a side effect of hiv, having HIV can make people who acquire scabies have more serious reactions. Your partner should be aware of your diagnosis and visit his or her primary care physician to begin simultaneous treatment. Sexual contact is the primary mode of transmission of this mite, at least among young adults, but people who are sharing a residence can transmit scabies.