- Possible high rate of transmission of nontypeable Haemophilus influenzae, including beta-lactamase-negative ampicillin-resistant strains, between children and their parents. Watanabe, H., Hoshino, K., Sugita, R., Asoh, N., Watanabe, K., Oishi, K., Nagatake, T. J. Clin. Microbiol. (2004)