A new strain of dysentery among Rwandan refugees languishing in Zaire is threatening to become too expensive for aid organizations. Relief officials say the contagious, bloody diarrhea is proving resistant to common antibiotics currently in use in the refugee camps, forcing doctors to turn to more sophisticated and expensive medicines. The Veep's wife, Tipper Gore, spent nearly five hours in the largest Zairian refugee camp, Kibumbo, aiding refugees weakened by disease. "They just need someone to hold their hand, love them and hug them," she said. "At least I can do that."