Sixty Years from Segretain's Description: What Have We Learned and Should Learn About the Basic Mycology of Talaromyces marneffei?

The fungus Talaromyces marneffei was described by Professor Gabriel Segretain in 1959, originally as a member of the genus Penicillium. As early as 60 years ago, its peculiarity in exhibiting temperature-dependent morphological dimorphism, its characteristic ability to secrete diffusing red pigment during the mycelial phase and its pathogenicity have already been recognised. Six decades have passed, and our understanding on this intriguing fungus has improved. Apart from the clinical aspect, we have gained a glimpse on its taxonomy, animal or environmental source(s), mechanism of thermal dimorphism, molecular genetics, virulence as well as pathogenesis. However, we are still on our way to get out of the talaromycosis mist. A lot more collective endeavour on T. marneffei research is needed to solve the jigsaw puzzle.