Abstract
The gut mycobiome exhibits major influence on the gastrointestinal health and disease but received less attention due to low abundance. This study characterizes the fungal community and compares the microbial diversity between indoor and outdoor cats. Genomic DNA was extracted and sequenced by targeting the Internal Transcribed Spacer 1 (ITS1) region using Flongle flow cell on MinION™ sequencing platform. Results show the phylum Ascomycota and genus Peniophorella were numerous in indoor cats, whereas the Basidiomycota and Pichia were abundant in outdoor cats. Peniophorella formed the core mycobiome in both feline populations. Furthermore, alpha (p value = 0.0207) and beta diversities (p value = 0.009) results showed significant differences between the two groups. Overall, indoor cats have greater amounts of Peniophorella, whereas outdoor cats have higher Trichosporon and unclassified Sordariaceae. The study also suggests that keeping a cat indoors or left as a stray will affect their respective gut mycobiome.
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Data availability
The sequencing data were deposited in the National Center for Biotechnology Information (NCBI) database and registered as BioProject PRJNA813732, Sequence Read Archive (SRA) was deposited as SRR18272551-SRR18272542, and BioSample with accession numbers SAMN26521149–SAMN26521158. Additional data regarding results can be found in supplementary file.
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Acknowledgements
The authors would like to thank the cat owners who provided cat stool samples and data for this research.
Funding
This work was financially supported the Ministry of Higher Education Malaysia, Universiti Malaysia Pahang and Supercat International Sdn. Bhd. for supporting this study through research funding. HFA was awarded for FRGS/1/2019/WAB13/UMP/03/1 and MNR was granted with UMP-MTUN Industry Matching Grant RDU192802/UIC190812, respectively.
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HFA, MNR, and SSK conceived the study and participated in its design. DDT and SSW conducted the experiment and analyzed the data. DDT and SSW drafted the manuscript. All authors read, revised, and approved the manuscript.
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This is an observational study. The Institutional Animal Care and Use Committee (IACUC) of Universiti Malaysia Pahang confirmed that no ethical approval is required because only freely passed stool samples were collected from healthy cats, no specific ethical approval was required. All samples used in this analysis were collected with verbal owner consent, who were aware that these samples were taken for research purpose only.
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203_2022_2929_MOESM2_ESM.tif
Supplementary file2 Fig. S1. Gut mycobiome composition for cats were conducted with Indoor Cats (IC) samples (n=5) and Outdoor Cats (OC) samples (n=5) through ITS1 gene amplicon sequencing. a). Taxa summary - Bar plot illustrating the relative abundant fungal features present within the two groups which combines all appropriate samples at phylum level where Ascomycota (abundance=0.6551) is more prevalent in Indoor Cats (IC) and Basidiomycota (abundance=0.7400) in Outdoor Cats (OC); b). Taxa summary - Bar plot illustrating the top 10 relative abundant fungal features present within the two groups which combines all appropriate samples at genus level where Peniophorella (abundance=0.3274) is most abundant in Indoor Cats (IC) samples while Trichosporon (abundance= 0.3484) and Pichia (abundance= 0.3641) are most abundant in Outdoor Cats (OC) samples (TIF 159 KB)
203_2022_2929_MOESM3_ESM.tif
Supplementary file3 Fig. S2. Gut mycobiome composition for cats were conducted with Indoor Cats (IC) samples (n=5) and Outdoor Cats (OC) samples (n=5) through ITS1 gene amplicon sequencing. Results were extracted from MicrobiomeAnalyst after post-processing in QIIME2: a). Taxa summary - Bar plot illustrating the relative abundant fungal features present within the two groups for each sample at class level; b). Taxa summary - Bar plot illustrating the relative abundant fungal features present within the two groups which combines all appropriate samples at class level where Agaricomycetes (abundance=0.7352) is more prevalent in Indoor Cats (IC) and Saccharomycetes (abundance=0.5733) in Outdoor Cats (OC); c). Taxa summary - Bar plot illustrating the top relative abundant fungal features present within the two groups for each sample at order level; d). Taxa summary - Bar plot illustrating the top relative abundant fungal features present within the two groups which combines all appropriate samples at order level where Agaricales (abundance=0.4077) and Corticiales (abundance=0.3274) are most abundant in Indoor Cats (IC) samples while Saccharomycetales (abundance= 0.5733) and Trichosporonales (abundance=0.3331) are most abundant in Outdoor Cats (OC) samples (TIF 535 KB)
203_2022_2929_MOESM4_ESM.tif
Supplementary file4 Fig. S3. Gut mycobiome composition for cats were conducted with Indoor Cats (IC) samples (n=5) and Outdoor Cats (OC) samples (n=5) through ITS1 gene amplicon sequencing. Results were extracted from MicrobiomeAnalyst after post-processing in QIIME2: a). Taxa summary - Bar plot illustrating the relative abundant fungal features present within the two groups for each sample at family level; b). Taxa summary - Bar plot illustrating the relative abundant fungal features present within the two groups which combines all appropriate samples at family level where Corticiaceae (abundance=0.3274) is more prevalent in Indoor Cats (IC) while Trichosporonaceae (abundance=0.3331) and Pichiaceae (abundance=0.3481) in Outdoor Cats (OC); c). Taxa summary - Bar plot illustrating the top 10 relative abundant fungal features present within the two groups for each sample at species level; d). Taxa summary - Bar plot illustrating the top 10 relative abundant fungal features present within the two groups which combines all appropriate samples at species level where Peniophorella odontiiformis (abundance=0.3274) is the most abundant in Indoor Cats (IC) samples while unclassified Trichosporon (abundance=0.3484) and Pichia kudriavzevii (abundance=0.3641) are most abundant in Outdoor Cats (OC) samples (TIF 436 KB)
203_2022_2929_MOESM5_ESM.tif
Supplementary file5 Fig. S4. Analysis was performed on both Indoor Cats (IC) (n=5) and Outdoor Cats (OC) (n=5) sample data obtained from ITS1 gene amplicon sequencing. Results were extracted from MicrobiomeAnalyst after post-processing in QIIME2: a). Plot of alpha diversity results using index observed feature at sample level which shows higher diversity in Outdoor Cats (OC) samples compared to Indoor Cats (IC). b). Alpha rarefaction plot showcasing that full diversity was observed within all samples (TIF 120 KB)
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Tay, D.D., Siew, S.W., Shamzir Kamal, S. et al. ITS1 amplicon sequencing of feline gut mycobiome of Malaysian local breeds using Nanopore Flongle. Arch Microbiol 204, 314 (2022). https://doi.org/10.1007/s00203-022-02929-3
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DOI: https://doi.org/10.1007/s00203-022-02929-3