In several of the hospitals still functioning in Gaza, nurses are fainting from hunger and dehydration. Managers often cannot provide meals for patients or medical staff. Doctors are running low on formula for newborn babies, in some cases giving them water alone.

And at least three major hospitals lack the nutritional fluids needed to properly treat malnourished children and adults.

Those scenes were described in interviews starting Friday with seven doctors — four from Gaza, and three volunteers from Australia, Britain and the United States. All of them worked this past week in four of the territory’s main hospitals.

After months of warnings, international agencies, experts and doctors say starvation is now sweeping across Gaza amid restrictions on aid imposed by Israel for months. At least 56 Palestinians died this month of starvation in the territory, nearly half of the total such deaths since the war began 22 months ago, according to data released on Saturday by the Gaza Health Ministry.

As starvation rises, medical institutions and staff, already struggling to treat war wounds and illness, are now grappling with rising cases of malnourishment.

Weak and dizzy, medics are passing out in the wards, where colleagues revive them with saline and glucose drips. Persistently short of basic tools such as antibiotics and painkillers, doctors are also running out of the special intravenous drips used to feed depleted patients.