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Background  Microbiota plays an important role in the biology, ecology and evolution of insects including tsetse flies. The bacterial profile of 3  Glossina palpalis gambiensis  laboratory colonies was examined using 16S  rRNA  gene amplicon sequencing to evaluate the dynamics of the bacterial diversity within and between each  G. p. gambiensis  colony.    Results  The three  G. p. gambiensis  laboratory colonies displayed similar bacterial diversity indices and OTU distribution. Larval guts displayed a higher diversity when compared with the gastrointestinal tract of adults while no statistically significant differences were observed between testes and ovaries.  Wigglesworthia  and  Sodalis  were the most dominant taxa. In more detail, the gastrointestinal tract of adults was more enriched by  Wigglesworthia  while  Sodalis  were prominent in gonads. Interestingly, in larval guts a balanced co-existence between  Wigglesworthia  and  Sodalis  was observed. Sequences assigned to  Wolbachia ,  Propionibacterium , and  Providencia  were also detected but to a much lesser degree. Clustering analysis indicated that the bacterial profile in  G. p. gambiensis  exhibits tissue tropism, hence distinguishing the gut bacterial profile from that present in reproductive organs.    Conclusions  Our results indicated that age, gender and the origin of the laboratory colonies did not significantly influence the formation of the bacterial profile, once these populations were kept under the same rearing conditions. Within the laboratory populations a tissue tropism was observed between the gut and gonadal bacterial profile.    Electronic supplementary material  The online version of this article (10.1186/s12866-018-1290-9) contains supplementary material, which is available to authorized users.

Different laboratory populations similar bacterial profile? The case of Glossina palpalis gambiensis