How do bacteria hedge their bets 🎲 in your gut? Our paper is out today in @cellhostmicrobe A baby received a routine course of amoxicillin. In that infant's #gut 💩, we could see something remarkable, already present **before** the antibiotic arrived: a single strain 🦠 of #Akkermansia muciniphila was already running a quiet experiment. A small subpopulation, 1%, had certain genes switched on that the rest of the population did not. #Importantly, no changes in DNA sequence, yet some genes turned on or off through chemical marks on the DNA. Under antibiotic pressure, that 1% minority expanded and took over. When the antibiotic changed, the population would shift in the opposite direction. This is #epigenetic #bet-#hedging: bacteria preemptively diversifying into distinct subpopulations so that when uncertain stress comes next, some fraction is already prepared. Our paper presents the first systematic study of this phenomenon across the human gut microbiome, spanning 2,345 metagenomic samples and over 1,300 bacterial species. #Akkermansia is one of the most studied next-generation probiotics, implicated in metabolic health and cancer immunotherapy response. We were genuinely surprised by its complexity: even within a single strain of Akkermansia, the level of #epigenetic #heterogeneity was striking: many coexisting subpopulations, each with different genes switched on, potentially responding differently to the same environment. Our findings suggest we need to study it at a much deeper level, understanding its #within-strain epigenetic diversity may be key to maximizing its therapeutic potential. Thanks to #longread #metagenomic sequencing (both #pacbio and #nanopore), which can simultaneously read DNA sequence and methylation at single-molecule resolution. We hope this paper helps make the case for bringing long-read approaches into microbiome research more broadly. Special 👏 to our first author @Fannimi2001, for his creativity, perseverance and rigor over this entire journey. Science like this does not happen without people who stay committed to a hard problem for the long haul. Also big thanks to Katerina Junker, @Yujie_L, @fanyu48696214, Yangmei Li, Wanjin Qiao, @Xue_Song__Zhang, @MagdalenaKsi, Edward Mead, @_Alan_T who helped Mi consistently in this journey. Very much grateful to our collaborators: @lauren282012 at the University of Victoria, @valdi001 at Duke University, Martin Blaser at Rutgers University and my colleague @jiang_wenyan at @SinaiGenetics. This work was truly a team effort! LINK: cell.com/cell-host-microbe/a… #epigenetics #microbiome #antibiotics #probiotics