Secretary of Health and Human Services Louis W. Sullivan and Agency for International Development Administrator Ronald W. Roskens will leave next Wednesday for a 17-day trip to Africa to assess child welfare and AIDS programs, fulfilling a promise President Bush made last fall to the United Nations.

The trip includes South Africa, Mali, Nigeria, Ivory Coast, Uganda, Malawi, Zimbabwe and Senegal. AIDS, which has spread widely in the center of the continent, is believed to be moving south toward South Africa.

"The mission will focus on efforts to bring about improvements in child survival as well as the devastating impact of AIDS in Africa, particularly as it affects mothers and children," a spokesman for Sullivan and Roskens said. The president, at the U.N. World Summit on Children Sept. 30, said he would send Sullivan and Roskens to review what "America and the world can do to advance child survival across that continent and across the world."

The Agency for International Development has allocated about $80 million for child-survival and health activities in Africa in 1990 and $80 million for voluntary family planning, officials said.

The delegation will include HHS Assistant Secretary for Health James O. Mason; Roskens's assistant administrator for Africa, Scott Spangler; the director of the HHS Centers for Disease Control, William L. Roper; National Institute of Child Health and Human Development director Duane F. Alexander; and William E. Rogers, vice chairman of the National Commission on AIDS.