GCC Microbiome Research Has Grown, but the Field Still Moves in Separate Tracks
Microbiome science is becoming one of the most useful lenses for One Health, yet the Gulf Cooperation Council countries have not built that lens into a coordinated regional research program. A systematic review of microbiome studies across Saudi Arabia, Qatar, Kuwait, the United Arab Emirates, Oman, and Bahrain found a publication base that is expanding after 2020, but still divided across human, animal, and environmental domains rather than connected through a shared framework.
The gap is structural. Human health studies dominate the literature, environmental work follows behind, and animal microbiome research remains thin enough that it cannot yet support a serious regional food-security agenda. No included study examined all three domains together in a single integrated design.
The Regional Literature Skews Toward Human Health and a Narrow Set of Questions
The review identified 110 studies that met eligibility criteria after screening microbiome-related research published through January 31, 2025. Nearly half of the publications, 49%, focused on the human microbiome. Environmental studies accounted for 40%, while only 11% examined animal microbiomes. Those proportions matter because they reveal where technical capacity, funding, and scientific attention have already concentrated, and where the region still lacks breadth.
Within the human literature, the gut and oral microbiomes attracted most of the attention. The disease focus was similarly concentrated, with metabolic disorders such as obesity and diabetes appearing frequently. This pattern is clinically logical: metabolic disease is highly prevalent in the region, and the microbiome offers a plausible mechanistic bridge between diet, inflammation, and insulin resistance. Even so, a field that keeps returning to the same organs and the same diagnoses will struggle to answer broader questions about host-microbe interaction, antimicrobial resistance, early-life exposures, and cross-domain transmission.
A narrow evidence base can still be productive, but it cannot claim to be comprehensive.
Saudi Arabia Drives Output While Smaller GCC Programs Remain Underrepresented
Research production was far from evenly distributed across the GCC. Saudi Arabia contributed 44% of all included publications, whereas Bahrain and Oman together accounted for fewer than 7%. That imbalance is not just an accounting issue. It determines which populations are sampled, which microbial ecosystems are sequenced, which laboratories gain experience, and which institutions become regional reference points for later translational work.
The review also showed that publication volume increased substantially after 2020. That rise suggests that microbiome research has moved from a niche scientific interest to a more visible regional priority. Yet growth without coordination can produce repetition instead of progress. If one country builds sequencing expertise while neighboring systems remain under-resourced, the region may generate isolated papers without developing shared standards for sample collection, annotation, bioinformatics, or data sharing.
Methodological Convergence Has Outpaced Biological Integration
Most studies were observational, and most relied on 16S rRNA gene sequencing on Illumina platforms. This combination is widely used because it is practical, comparatively affordable, and suitable for building an initial map of microbial composition. It is also limited. Taxonomic profiling alone cannot fully resolve strain-level variation, functional pathways, metabolomic output, host response, or the environmental pressures that shape microbial communities across humans and animals.
In practice, that means much of the GCC literature can describe who is there, but not always what the organisms are doing. For a region exposed to high heat, arid soil ecosystems, rapid urbanization, changing dietary patterns, and concentrated livestock production, the missing functional layer is important. Microbial communities do not exist in isolation; they respond to climate, water systems, sanitation, food supply, antibiotic exposure, and animal husbandry. A One Health approach exists precisely because those boundaries are porous.
Animal and Environmental Studies Leave Major Translational Questions Unanswered
Animal microbiome work was limited and centered largely on camels. That focus reflects the cultural and economic relevance of camels in the Gulf, but it does not cover the full livestock environment relevant to food security. The evidence base remains sparse for other animal systems that may matter for zoonotic risk, agricultural productivity, and antimicrobial stewardship. Without broader coverage, the region cannot yet connect animal microbiomes to the practical questions that shape nutrition and supply chains.
Environmental studies mainly examined soil and desert environments. Those ecosystems are scientifically important in their own right, especially in arid climates where microbial survival strategies can inform ecology and adaptation. Still, environmental sequencing without corresponding human and animal data leaves the One Health triangle incomplete. Soil, water, animals, and people circulate microbes through shared ecological routes. Studying only one edge of that network limits what can be inferred about transmission, resilience, and intervention points.
One Health Requires More Than Parallel Research Programs
The most consequential finding in the review is the absence of any study that simultaneously investigated human, animal, and environmental microbiomes within one integrated design. That absence is not a minor methodological detail. It marks the difference between a region that is publishing microbiome papers and a region that is building microbiome intelligence.
An integrated framework would require governance, infrastructure, funding, and workforce planning that cross institutional silos. Shared biobanks, standardized metadata, regionally harmonized sequencing pipelines, and multidisciplinary teams would help turn descriptive work into translational science. In microbiome research, the value of a sample depends heavily on how it is contextualized; a stool sample, a soil sample, and an animal swab can only speak to each other when the underlying design treats them as connected data streams.
Coordinated Capacity Building Will Determine Whether the Field Matures
The review points to a clear strategic need: the GCC countries will need coordinated regional planning if microbiome science is to contribute meaningfully to health, food security, and environmental sustainability. That planning has to extend beyond publishing more studies. It must include laboratory capacity, training in bioinformatics and systems biology, and funding models that reward cross-sector collaboration rather than isolated projects.
Without that shift, the region is likely to continue generating useful but fragmented snapshots. With it, the GCC could move toward a microbiome research platform capable of addressing obesity, diabetes, antimicrobial resistance, desert ecology, and livestock health within a single scientific logic. The current literature does not yet support that ambition, but it does define the exact gaps that stand in the way.