Table 5.

Human Immunodeficiency Virus (HIV) Drug Resistance in Infants at Time of Diagnosis by Antiretroviral Class and Timing of Vertical Transmission

	In utero or Peripartum Vertical Transmission	Breastfeeding Vertical Transmission
Number and Antiretroviral Drug Class With Resistance Mutations Detected	n = 41 (53.3%)	n = 36 (46.7%)
NRTI
Single	…	3 (8.3%)
Multiple	…	…
NNRTI
Single	5 (12.2%)	8 (22.2%)
Multiple	…	7 (19.4%)
NRTI and NNRTI	…	1 (2.8%)
Total number (%; 95% CI)	5 (12.5%; 4.1%, 26.2%)	19 (52.8%; 35.5%, 69.6%)

Abbreviations: CI, confidence interval; NRTI, nucleoside reverse transcriptase inhibitors; NNRTI, non-nucleoside reverse transcriptase inhibitors.