Mexico’s Health Secretary David Kershenobich said on Thursday that roughly 30 people have contracted myiasis caused by the New World screwworm, confirming earlier reports of 21 cases in Chiapas. Officials stressed that no infections have been fatal and that patients only require surgical cleansing to remove larvae. The ministry is urging basic wound hygiene to prevent further cases and maintains that the outbreak is contained. While the human tally remains low, the parasite has inflicted wider damage on livestock since its first detection last November. The National Agri-Food Health, Safety and Quality Service (Senasica) estimates about 3,000 animal infestations to date, of which 260–270 are still active. Authorities say 32 shipments of infected cattle have been intercepted and returned to their points of origin, and roughly 2 billion sterile flies have been released to curb the pest’s spread. Agriculture Secretary Julio Berdegué and U.S. counterparts are negotiating the phased reopening of the border for Mexican cattle exports. The first crossing, at Douglas, Arizona, is scheduled to resume operations on 7 July, after being shut on 11 May amid concerns over screwworm. Officials argue that progress in containment, coupled with continued surveillance, supports the gradual normalisation of trade.