Evidano home
Commentary on News

Faster Findings: qualitative analysis of pig disease drivers

Evidano8 min read

Fast, reproducible insights from participatory systems mapping are possible. A July 9, 2026 PLOS NTDs study of Gwembe District (fieldwork October 2023) used Spatial Group Model Building (SGMB) and LayerStack with 12 value-chain actors to surface how poverty, free-range husbandry, open defecation, seasonal water scarcity and informal trade sustain African swine fever (ASF) and porcine cysticercosis (PCC) transmission. This post shows how to convert SGMB maps, behaviour-over-time graphs, and causal loop diagrams into quantified themes and stakeholder-ready visual reports using AI-enabled qualitative analysis, and how Evidano ingests transcripts, maps and notes, auto-codes themes, and produces cross-segment frequency and co-occurrence visualizations so you can move from local maps to One Health policy recommendations rapidly.

Key Takeaways

Evidano is an AI-powered qualitative data analysis platform that ingests transcripts, maps, and notes to auto-code themes and produce visual reports.

AI-enabled qualitative analysis converts participatory SGMB maps and narratives into quantified, comparable insights you can act on, as demonstrated by the Gwembe Valley case (fieldwork October 2023, study published July 9, 2026).

  • The Gwembe SGMB with 12 purposively selected pig value-chain actors identified non-biological drivers of ASF and PCC and produced five spatial layers, behaviour-over-time graphs, and causal loop diagrams.
  • Transporter reports (150–200 pigs/trip to Lusaka; 250–350 to Kasumbalesa) flagged potentially underreported movements versus District Veterinary Office records.
  • Use the provided 7-step checklist to reproduce these insights in a 2-week pilot and convert maps and notes into prioritized, low-cost interventions (housing, WASH, participatory surveillance).

Fast take + original source

Fast take: Researchers ran an SGMB session with 12 purposively selected pig value-chain actors in Gwembe District (October 2023) to co-produce spatial layers, behaviour-over-time graphs and causal loop diagrams that identify non-biological disease drivers for ASF and PCC; the study was published July 9, 2026 in PLOS NTDs.

  • Payoff: Learn how to operationalize participatory maps into quantified themes, detect underreported transport flows, and generate visual evidence for low-cost interventions.
  • Context: practical for One Health teams, surveillance managers, and qualitative researchers working on livestock or neglected tropical diseases.

Findings snapshot

Date / MetricValueSourceImplication
Study publishedJuly 9, 2026PLOS NTDsPeer-reviewed SGMB case study
FieldworkOctober 2023; 12 participantsStudy methodsParticipatory, purposive sampling (farmers, traders, transporters, vet staff)
Gwembe pig pop (2019)9, 188 headsDistrict records citedSmallholder-dominated, free-range common
Transporter estimates150–200 pigs/trip to Lusaka; 250–350 to KasumbalesaParticipant reportsLarge, potentially underreported movements vs. DVO records
Gwembe population79, 273 (2022 census)National statisticsRural/peri-urban context; limited WASH and veterinary coverage

What the SGMB revealed (methods & outputs)

The SGMB produced five spatial layers, behaviour-over-time graphs, and causal loop diagrams that were synthesized for thematic analysis.

The team used a LayerStack over a regional map to co-produce five spatial layers (settlements, production zones, markets, disease occurrence, service points), behaviour-over-time graphs, and causal loop diagrams (CLDs). Data were synthesized using inductive thematic analysis and triangulated with District Veterinary Office records. Ethics approvals and anonymization were applied; no identifying audio or photos were retained.

  • Core qualitative inputs: facilitator notes, LayerStack acetate layers, stakeholder narratives, and district documents.
  • Analytic outputs: thematic codes, CLDs for ASF and PCC, and identification of leverage points (low-cost housing, participatory surveillance, WASH).
  • Limitations: small purposive sample (n=12); CLDs are qualitative models for hypothesis and intervention design rather than parameterized simulations.

How to scale qualitative analysis of pig disease drivers with AI

For One Health researchers and policy teams

One Health researchers and policy teams should use AI-enabled thematic and frequency analysis to quantify which drivers appear most across stakeholder groups and locations.

Use AI-enabled thematic and frequency analysis to quantify which drivers (for example, open defecation, informal trade) appear most across stakeholder groups and locations. Prioritize interventions where themes and spatial overlap (for example, markets plus shallow wells) are highest.

Generate succinct decision briefs with co-occurrence networks and CLD exports to show reinforcing loops (poverty↔biosecurity↔ASF).

For surveillance managers and vets

Surveillance managers and vets should compare transporter narratives against official movement records to flag likely underreported flows.

Compare transporter narratives against official movement records using cross-segment frequency counts to flag likely underreported flows (for example, 150–350 pigs/trip reported vs. lower DVO counts).

Design community-based participatory surveillance scripts informed by the top-ranked themes and locations from your corpus.

For qualitative teams & UX researchers

Qualitative teams and UX researchers should turn LayerStack images, facilitator notes and transcripts into a single corpus and auto-generate a codebook.

Turn LayerStack images, facilitator notes and transcripts into a single corpus, auto-generate a codebook, then refine codes iteratively with local language terms preserved.

Produce shareable visualizations (word clouds, co-occurrence, hierarchical code trees) that make leverage points obvious to non-technical stakeholders.

Do more, faster with Evidano (mapped to this use case)

Problem: fragmented SGMB outputs → Solution

To solve fragmented SGMB outputs, import map images, facilitator notes, and typed transcripts into Evidano for linked analysis.

Import map images, facilitator notes, and typed transcripts into Evidano. The platform ingests documents and images and links spatial notes to text segments so you can trace mentions to map locations.

Problem: inconsistent codes and local terms → Solution

To capture inconsistent codes and local terms, use Evidano codebook import and AI-assisted coding to preserve participant language.

Use Evidano codebook import and AI-assisted coding to capture participant language (custom dictionaries for local terms), then harmonize codes across sessions.

Problem: hard to compare groups (transporters vs DVO) → Solution

To compare groups, run cross-segment frequency analysis and export tables showing theme prevalence by actor type.

Run cross-segment frequency analysis and export tables showing theme prevalence by actor type; flag mismatches between reported movement volumes and official records for follow-up.

Problem: stakeholders need visual proof → Solution

To provide visual proof to stakeholders, generate one-click visualizations such as co-occurrence networks and CLD overlays in Evidano.

One-click visualizations: co-occurrence networks, hierarchical code to subcode trees, and CLD overlays that translate qualitative loops into prioritized intervention points.

Evidano encrypts your data and does not use customer data to train third-party models, see Evidano for details.

Checklist: 7-step workflow to reproduce these insights (2 weeks pilot)

This checklist provides a 7-step workflow to go from SGMB outputs to an evidence brief in about two weeks.

  • 1) Collect imports: scan LayerStack acetate layers, upload facilitator notes, typed transcripts, and DVO records into Evidano.
  • 2) Auto-transcribe any short audio (or upload typed transcripts); apply custom dictionary for local pig/husbandry terms and PII redaction.
  • 3) Auto-suggest codebook, then run a quick manual pass to align codes to participant language (2–3 hours).
  • 4) Run thematic + frequency analysis across actor segments (farmers, traders, transporters, vets).
  • 5) Generate co-occurrence networks and map-theme overlays to locate hot spots (for example, markets near shallow wells).
  • 6) Produce a concise stakeholder brief with visuals and a prioritized list of low-cost interventions (housing, WASH, participatory surveillance).
  • 7) Share interactive outputs with community stakeholders and iterate (export CSV/PowerPoint).

Conclusion: act on systems evidence

The conclusion is that contagious pig disease risk is produced by interacting socio-economic, environmental and trade systems rather than single causes.

The Gwembe Valley SGMB demonstrates that contagious pig disease risk is produced by interacting socio-economic, environmental and trade systems rather than single causes. AI-enabled qualitative analysis converts participatory maps and narratives into quantified, comparable insights you can act on: prioritize WASH plus biosecurity hotspots, surface underreported trade flows, and co-design locally feasible interventions.

  • Ethics note: this is research-focused guidance, not clinical advice; follow local ethical approvals for community data work.
  • Next step: try the 2-week pilot workflow with your SGMB outputs, start at Try Evidano for free and bring your transcripts, notes, and LayerStack images to a single, secure workspace.

FAQ: qualitative analysis of pig disease drivers

What methods did the Gwembe study use?

The Gwembe study used Spatial Group Model Building (SGMB), LayerStack mapping, behaviour-over-time graphs, and causal loop diagrams.

The team co-produced five spatial layers (settlements, production zones, markets, disease occurrence, service points), behaviour-over-time graphs, and CLDs, then synthesized data with inductive thematic analysis and triangulated findings with District Veterinary Office records.

When and where was the fieldwork conducted and how many participants were involved?

Fieldwork was conducted in Gwembe District in October 2023 with 12 purposively selected pig value-chain actors.

The participant group included farmers, traders, transporters, and veterinary staff who co-produced maps and narratives during the SGMB session.

What are the main non-biological drivers identified for ASF and PCC?

The main non-biological drivers identified include poverty, free-range husbandry, open defecation, seasonal water scarcity, and informal trade.

These drivers were surfaced through participant narratives and spatial overlaps between markets, shallow wells, and settlements during LayerStack exercises.

What outputs should I expect from applying this AI-enabled workflow?

Expect thematic codes, cross-segment frequency tables, co-occurrence networks, map-theme overlays, and causal loop diagrams.

The analytic outputs enable prioritization of low-cost interventions such as improved housing, WASH, and participatory surveillance and provide evidence for follow-up with authorities.

What are the limitations of the SGMB and CLD approach?

The primary limitation is the small purposive sample and the qualitative nature of CLDs, which are hypothesis-generating rather than parameterized simulations.

Users should treat CLDs as qualitative models for intervention design and follow up with additional data collection or quantitative analyses where needed.

Topics

  • AI qualitative analysis
  • pig disease drivers
  • SGMB Gwembe
  • LayerStack
  • participatory mapping

Keep reading

Browse all articles