AIP56, an AB toxin secreted by Photobacterium damselae subsp. piscicida, has tropism for myeloid cells
IntroductionThe AB-type toxin AIP56 is a key virulence factor of Photobacterium damselae subsp.piscicida (Phdp), inducing apoptosis in fish immune cells.The discovery of AIP56-like and AIP56-related toxins in diverse organisms, including human-associated Vibrio strains, highlights the evolutionary conservation of this toxin family, suggesting that