Recent research is revealing that diets rich in complex plant carbohydrates, which are slowly fermented along the large intestine (LI), promote not only bacterial diversity and abundance but also beneficial bacterial species. In fruits, a major plant cell wall carbohydrate is pectin, and is consumed either as part of the whole fruit tissue, or as a refined ingredient, such as in jams/preserves. Here we investigated the effects of adding mango fruit pulp or purified fruit pectin to a low-fibre diet on the porcine LI bacterial community. The diets were fed for three weeks to 18 male pigs, and digesta was collected post-euthanasia from the LI caecal (Cae) and distal colon (DC) sites. Bacterial 16S rRNA gene amplicon (V3-V4 region) sequencing of samples enabled community profiling and investigation of the abundance of Faecalibacterium prausnitzii, a recognised microbial indicator of a healthy LI bacterial community. Sequences classified to species level as F. prausnitzii were detected in all digesta sampled from pigs consuming the mango fruit pulp and fruit pectin diets, but were not detected in those animals fed the low-fibre diet (P<0.05). This was despite F. prausnitzii being detectable in faecal samples obtained from all pigs prior to the commencement of the treatment diets. Furthermore, F. prausnitzii abundance was stable between the Cae and DC for the mango fruit pulp diet compared to the fruit pectin diet, where levels were higher at the beginning of the LI, but then decreased by the DC (P<0.05). These results suggest that the mango fruit pulp diet favoured F. prausnitzii growth throughout the LI, while the fruit pectin diet was rapidly fermented, resulting in a decline in F. prausnitzii abundance by the DC. This was in contrast with the low-fibre diet results, where F. prausnitzii was not detectable in either the Cae or DC. Using pigs as a model for humans, this study has highlighted the potential benefits of whole fruit consumption (mango fruit pulp), over a refined dietary fibre (fruit pectin) alone.