13 sick in 10 sates – including Washington. Washington State Department of Health reports:

CDC and public health officials in several states, the Infant Botulism Treatment and Prevention Program, and FDA are investigating a multistate outbreak of infant botulism linked to recalled infant formula. Infant botulism happens when swallowed spores from a type of bacteria called Clostridium botulinum infects a baby’s large intestine and make toxin in it. Infant botulism often starts with constipation but is usually first noticed as difficulty feeding (sucking and swallowing), a weak and altered cry, and loss of muscle tone.