Get a dictionary of enumerations for diseases.

        :param int att_ind_start: Starting index for enumeration.
        :return: Dictionary of disease, number pairs.

def get_disease_mappings(self, att_ind_start):
        """Get a dictionary of enumerations for diseases.

        :param int att_ind_start: Starting index for enumeration.
        :return: Dictionary of disease, number pairs.
        """
        all_disease_ids = self.get_all_unique_diseases()
        disease_enum = enumerate(all_disease_ids, start=att_ind_start)
        disease_mappings = {}
        for num, dis in disease_enum:
            disease_mappings[dis] = num
        return disease_mappings