Integrated mapping of environmental and biological contamination and vendor knowledge gaps in raw milk: a practices-based risk assessment with implications for pediatric and geriatric health in Pakistan

Mapeamento integrado da contaminação ambiental e biológica e das lacunas de conhecimento dos fornecedores de leite cru: uma avaliação de risco baseada em práticas com implicações para a saúde pediátrica e geriátrica no Paquistão

Abstract

Raw, unpasteurized milk is a nutrient-rich but highly unstable biological substrate in which microbial growth, adulteration, and physicochemical deterioration can accelerate rapidly under warm environments, poor container hygiene, and informal distribution practices. These hazards disproportionately threaten pediatric and geriatric populations, who are more vulnerable to dehydration, sepsis, and complications from foodborne infections, and for whom even short lapses in cold-chain handling or heat treatment can translate into clinically meaningful risk. In Pakistan, where raw milk is commonly delivered through decentralized vendor networks with variable oversight, identifying the combined ecological (environmental exposure, storage conditions) and behavioral (knowledge, hygiene, testing practices) drivers of contamination is essential for prevention strategies that prioritize high-risk consumers. We conducted a community-based cross-sectional assessment (December 2024–September 2025) of 110 raw-milk vendors operating across >100 distribution points in Pakistan’s capital region. Using a structured 35-item questionnaire spanning vendor operations, adulteration awareness, hygiene and bacterial-control behaviors, contamination knowledge, handling/exposure pathways, and regulatory interaction, we constructed validated composite indices, Awareness (α = 0.72), Hygiene Practice (α = 0.74), and Regulatory Compliance (0–3 scale), and analyzed associations using χ² tests, Spearman’s ρ, logistic regression, and negative-binomial models (SPSS v26). Among vendors, 43.6% had primary education and 31.8% reported >5 years of experience. Regular purity testing was performed by 55.5% (95% CI 46.0–64.6), yet only 17.3% used laboratory analysis; 13.6% never tested. Water adulteration was most prevalent (56.4%), followed by starch (15.5%) and urea (4.6%). While container cleaning after each use was common, refrigeration was available to only 32.7%, and <5% reported any boiling/pasteurization or heat treatment—an especially critical gap for milk destined for children and older adults. Overall contamination-related awareness remained limited (Awareness Index 2.4 ± 1.1). Training exposure significantly improved hygiene (β = 0.42, p < 0.01) and knowledge (ρ = 0.58, p < 0.001). Lack of refrigeration increased spoilage-related events (IRR = 1.72; 95% CI 1.10–2.68), while regular purity testing was associated with fewer quality-related complaints (OR = 0.42; 95% CI 0.19–0.91). Regulatory engagement was weak (40% reported no inspections; 53.6% lacked formal training), though inspection frequency showed a moderate association with cleaner handling practices (Cramér’s V = 0.31). Predictive modeling suggested an estimated ~25% rise in microbial contamination over the next five years if current practices persist, versus projected reductions of ~40% with widespread boiling and >99% with universal pasteurization (pseudo-R² = 0.81). Overall, we identify a critical disconnect between visible cleanliness and true biological-risk control, with the most consequential deficits concentrated in refrigeration and heat-treatment behaviors, precisely the controls that most protect pediatric and geriatric consumers. Low-cost, vendor-centered capacity building, accessible rapid testing, strengthened inspection pathways, and targeted messaging (e.g., “milk for children/older adults must be boiled/pasteurized”) could substantially reduce environmentally driven and biological contamination risks across Pakistan’s informal dairy ecosystem.

Keywords:
raw milk; adulteration; vendor practices; food safety; Pakistan; awareness index; hygiene compliance; regulation

Resumo

O leite cru não pasteurizado é um substrato biológico rico em nutrientes, porém altamente instável, no qual o crescimento microbiano, a adulteração e a deterioração físico-química podem se acelerar rapidamente em ambientes quentes, com higiene inadequada dos recipientes e práticas informais de distribuição. Esses riscos ameaçam desproporcionalmente as populações pediátricas e geriátricas, que são mais vulneráveis ​​à desidratação, sepse e complicações decorrentes de infecções transmitidas por alimentos, e para as quais mesmo pequenas falhas no manuseio da cadeia de frio ou no tratamento térmico podem se traduzir em riscos clinicamente significativos. No Paquistão, onde o leite cru é comumente distribuído por redes descentralizadas de fornecedores com supervisão variável, identificar os fatores combinados de contaminação ecológica (exposição ambiental, condições de armazenamento) e comportamental (conhecimento, higiene, práticas de teste) é essencial para estratégias de prevenção que priorizem os consumidores de alto risco. Realizamos uma avaliação transversal de base comunitária (dezembro de 2024 a setembro de 2025) com 110 vendedores de leite cru que operam em mais de 100 pontos de distribuição na região da capital do Paquistão. Utilizando um questionário estruturado de 35 itens, abrangendo as operações dos vendedores, a conscientização sobre adulteração, os comportamentos de higiene e controle bacteriano, o conhecimento sobre contaminação, as vias de manuseio/exposição e a interação com órgãos reguladores, construímos índices compostos validados: Conscientização (α = 0,72), Práticas de Higiene (α = 0,74) e Conformidade Regulatória (escala de 0 a 3). Analisamos as associações utilizando os testes χ², ρ de Spearman, regressão logística e modelos binomiais negativos (SPSS v26). Entre os vendedores, 43,6% tinham ensino fundamental e 31,8% relataram mais de 5 anos de experiência. Testes regulares de pureza foram realizados por 55,5% (IC 95% 46,0–64,6), porém apenas 17,3% utilizaram análises laboratoriais; 13,6% nunca realizaram testes. A adulteração por água foi a mais prevalente (56,4%), seguida por amido (15,5%) e ureia (4,6%). Embora a limpeza dos recipientes após cada uso fosse comum, a refrigeração estava disponível para apenas 32,7%, e menos de 5% relataram qualquer fervura/pasteurização ou tratamento térmico —lacuna especialmente crítica para o leite destinado a crianças e idosos. A conscientização geral sobre contaminação permaneceu limitada (Índice de Conscientização 2,4 ± 1,1). A participação em treinamentos melhorou significativamente a higiene (β = 0,42, p < 0,01) e o conhecimento (ρ = 0,58, p < 0,001). A falta de refrigeração aumentou os eventos relacionados à deterioração (IRR = 1,72; IC 95% 1,10–2,68), enquanto testes regulares de pureza foram associados a menos reclamações relativas à qualidade (OR = 0,42; IC 95% 0,19–0,91). O engajamento regulatório foi fraco (40% relataram não ter recebido inspeções; 53,6% não possuíam treinamento formal), embora a frequência de inspeções tenha mostrado associação moderada com práticas de manipulação mais higiênicas (V de Cramér = 0,31). A modelagem preditiva sugeriu um aumento estimado de aproximadamente 25% na contaminação microbiana nos próximos cinco anos, caso as práticas atuais persistam, em comparação com reduções projetadas de aproximadamente 40% com a fervura generalizada e >99% com a pasteurização universal (pseudo-R² = 0,81). No geral, identificamos uma desconexão crítica entre a limpeza visível e o verdadeiro controle do risco biológico, com as deficiências mais consequentes concentradas nos comportamentos de refrigeração e tratamento térmico, justamente os controles que mais protegem os consumidores pediátricos e geriátricos. A capacitação de baixo custo centrada no fornecedor, testes rápidos acessíveis, vias de inspeção reforçadas e mensagens direcionadas (por exemplo, “o leite para crianças/adultos mais velhos deve ser fervido/pasteurizado”) poderiam reduzir substancialmente os riscos de contaminação biológica e ambiental em todo o ecossistema leiteiro informal do Paquistão.

Palavras-chave:
leite cru; adulteração; práticas de fornecedores; segurança alimentar; Paquistão; índice de conscientização; conformidade com higiene; regulamentação

1. Introduction

Milk, long celebrated as a symbol of nourishment and purity, has paradoxically evolved into one of Pakistan’s most common sources of foodborne infection and toxic exposure. Despite its indispensable nutritional value, unpasteurized milk sold through informal channels has become a recurrent vector for disease outbreaks, hospitalizations, and deaths across multiple provinces. Over the past decade, national and local media have reported numerous fatalities, including infants and children, linked to consumption of contaminated or adulterated milk. These recurring tragedies reveal a deep systemic failure in dairy governance, vendor education, and public-health surveillance (Abbas et al., 2022). The problem is no longer isolated to rural neglect; it has become a nationwide epidemic of preventable morbidity rooted in cultural reliance on “fresh milk” and institutional complacency toward safety regulation. Pakistan ranks among the world’s top milk producers, generating over sixty billion liters annually, yet much of this supply circulates outside formal processing systems. The vast majority of consumers purchase raw milk directly from small vendors, roadside retailers, or door-to-door distributors who operate without refrigeration, microbial testing, or standardized handling protocols. Once secreted as a sterile biological fluid, milk quickly becomes a fertile medium for microbial growth when exposed to unhygienic collection and storage conditions (Chandio et al., 2007). Temperature fluctuations, contaminated containers, and repeated human contact permit exponential proliferation of pathogenic microorganisms such as Escherichia coli, Listeria monocytogenes, Staphylococcus aureus, Salmonella spp., Campylobacter jejuni, and Brucella abortus. These organisms are well-recognized etiologic agents of diarrhea, typhoid-like fever, septicemia, meningitis, spontaneous abortion, and zoonotic tuberculosis. In infants, unboiled or spoiled milk has been implicated in acute gastroenteritis, electrolyte imbalance, and enteric sepsis, while in adults it contributes to chronic liver dysfunction, reactive arthritis, and immunological hypersensitivity.

Chemical adulteration further compounds these microbial threats. To extend shelf life or compensate for dilution, unscrupulous suppliers often introduce water, starch, detergent, urea, formalin, or synthetic whiteners. These adulterants not only degrade nutritional content but also introduce cumulative toxic effects, including nephrotoxicity, hepatocellular damage, endocrine disruption, and carcinogenic potential (FAO, 2011). Chronic ingestion of chemically altered milk has been associated with metabolic acidosis, hemolytic anemia, and reduced cognitive development in children. Such hazards persist largely undetected because routine toxicological monitoring is absent in community-level health systems, and clinicians seldom attribute gastrointestinal or renal symptoms to contaminated dairy intake.

The microbial and chemical contamination crisis is amplified by infrastructural and behavioral gaps. In most urban and peri-urban areas, cold-chain logistics remain rudimentary; milk is transported in unsealed metallic containers without temperature regulation, facilitating bacterial multiplication and lipid oxidation. Even when consumers attempt to mitigate risk through boiling, the practice is inconsistently applied and scientifically insufficient: many thermoduric pathogens survive standard household heating, and adulterants remain chemically stable. Pasteurization, the only globally recognized assurance of microbiological safety, is seldom practiced or trusted, largely due to misinformation, cultural preference for raw taste, and limited access to processed alternatives (FAO, 2013).

Equally concerning is the deficiency in professional and policy-level literacy on milk-borne health hazards. Food safety is rarely integrated into the clinical, nutritional, or public-health curricula of medical and allied institutions, resulting in under-diagnosis and poor epidemiological documentation of milk-related illnesses. Public-health policy remains reactive rather than preventive, constrained by fragmented surveillance, outdated regulatory frameworks, and limited enforcement authority. Provincial food authorities, though increasingly active, struggle to monitor thousands of unregistered vendors dispersed across densely populated neighborhoods. Consequently, contaminated milk often reaches homes, hospitals, and childcare centers without traceability or accountability, perpetuating a silent epidemic among vulnerable groups, especially children under five, pregnant women, the elderly, and immunocompromised patients (Haq et al., 2024).

Against this backdrop, understanding vendor behavior becomes a public-health imperative. Small-scale milk sellers are the critical intermediaries between farm production and urban consumption, yet their knowledge, attitudes, and practices remain poorly documented. Existing data focus primarily on laboratory contamination rates rather than behavioral determinants of safety. Comprehensive field evidence linking vendor education, hygiene practices, regulatory exposure, and disease awareness is scarce.

The present study therefore seeks to fill this gap by systematically evaluating the operational practices, microbial-risk perception, and regulatory awareness among raw-milk vendors in Islamabad and Rawalpindi, two of Pakistan’s largest urban dairy markets. Using a structured 35-item survey and validated behavioral indices, the study quantifies the relationships between education, hygiene, and awareness, and models the predicted trajectory of contamination risk under current versus improved safety behaviors. By integrating epidemiological insight with policy relevance, this investigation aims to provide an evidence-based framework for developing vendor training, inspection programs, and consumer-protection strategies essential to modernizing Pakistan’s dairy safety ecosystem.

2. Materials and Methods

2.1. Study design and sampling

A community-based, cross-sectional survey was conducted from June–September 2025 among raw-milk vendors at 100+ retail points in Islamabad and Rawalpindi. Inclusion criteria comprised active milk sale for ≥6 months and consent to participate. A total of 110 vendors were enrolled through purposive random sampling. Trained enumerators conducted face-to-face interviews in Urdu and Punjabi to ensure comprehension among low-literacy participants. Ethical approval was granted by the ICMSR Institutional Review Board. Participation was voluntary, anonymized, and supported by verbal informed consent.

2.2. Questionnaire instrument

The 35-item questionnaire (Q1–Q35) captured vendor demographics, handling operations, hygiene practices, adulteration awareness, disease knowledge, consumer exposure, and regulatory compliance. Questions were structured as single- or multiple-choice items with categorical and ordinal responses (detailed mapping provided in Supplementary Table S1).

The instrument encompassed six thematic domains: Vendor profile & operations (Q1–Q5, Q13, Q23, Q26, Q35) – Experience, milk type, handling/sales volume, spoilage, source, and complaint management. Purity perception & adulteration control (Q6, Q14–Q22) – Belief in purity, testing frequency, detection methods, adulterant types, and corrective actions. Safety practices & bacterial mitigation (Q28, Q30–Q31) – Container sanitation, boiling, refrigeration, pasteurization, and related behavioral norms. Awareness of milk-borne diseases & vulnerable groups (Q7, Q16–Q19) – Knowledge of synthetic milk, hepatitis, tuberculosis, and diarrhea transmission risks. Consumer exposure & complaints (Q8–Q12, Q25) – Perceived safety for children, infant feeding, under-18 consumption, and customer feedback. Regulatory and knowledge ecosystem (Q15, Q32–Q34) – Awareness of harmful contents, training history, and frequency of official inspection.

2.3. Index construction

Three reproducible composite indices were developed: Awareness Index (0–4): sum of correct awareness for diarrhea (Q18), hepatitis (Q16), bovine TB (Q17), and synthetic milk (Q7 = yes); reliability α = 0.72. Hygiene Practice Index (0–5): presence of boiling, refrigeration, container cleaning after each use, daily cleaning, and regular purity testing; reliability α = 0.74. Regulatory Compliance Index (0–3): inspection exposure (Q33 > never = 1), training (Q34 > never = 1), and regulatory awareness (Q32 = 1/0.5/0).

Each index was standardized (z-score) for multivariate regression.

2.4. Data management and statistical analysis

Data were processed using SPSS v26 and Excel 365. Missing data (<2%) were managed by pairwise deletion. Descriptive statistics included frequencies with Wilson 95% confidence intervals (CIs). Bivariate analyses:

• Categorical vs categorical: χ² or Fisher’s exact with Cramér’s V effect size.

• Ordinal vs continuous: Spearman’s ρ (95% CI by bootstrap). Multivariate analyses:

• Binary logistic regression for infant-milk consumption (Q9), child-safety perception (Q8), and complaint occurrence (Q11). – Ordinal logistic regression for graded perceptions (“safe/maybe/unsafe”). – Negative-binomial regression for spoilage volume (Q5 midpoint values). – OLS regression for standardized Hygiene Index outcomes.

Predictive trend modeling estimated microbial-risk trajectories assuming baseline contamination increase of 5% per year under current conditions.

3. Results

3.1. Demographics and operational characteristics

Among respondents, 43.6% had primary education, 28.2% secondary, 14.6% illiterate, and 13.6% post-secondary. Experience exceeded 5 years in 31.8% and correlated inversely with spoilage volume (ρ = –0.42, p = 0.017). Mixed milk (42.7%) predominated over buffalo (23.6%) and cow (18.2%). Handling capacity was typically 50–100 L/day (30.9%), with sales clustered in the 20–100 L/day range (33.6%).

Table 1 provides insights on vendor demographics, practices, awareness, and predictive outcomes.

Table 1
Comprehensive summary of vendor demographics, practices, awareness, and predictive outcomes.

Domain	Variable	Category / Level	n (approx)	%	Association Metric	Effect Size / Coefficient	95% CI / SE	p-value	Model/Notes
Demographics & Operations	Education	Primary	48	43.6
Demographics & Operations	Experience (>5y)	Yes	35	31.8	Spearman ρ	-0.42	SE not reported	0.017	Inverse relation with spoilage
Hygiene & Storage	Refrigeration	Used	36	32.7	IRR	1.72	95% CI 1.10–2.68	<0.05	No refrigeration ↑ spoilage
Hygiene & Storage	Training effect				OLS β	0.42	—	<0.01	β Training → Hygiene Index
Awareness & Perception	Awareness Index	Mean±SD			ρ	0.58	Training ↔ Awareness	<0.001	Higher with training exposure
Regulatory & Training	Regulation awareness	Fully aware	43	39.1
Predictive Model	Universal Pasteurization	Projected risk ↓		-99					Projected 99% reduction

Spoilage affected 72.7% of sellers, predominantly 1–5 L/day (34.6%). Absence of refrigeration nearly doubled spoilage probability (OR = 1.8, p = 0.016). Vendors with >5 years’ experience and refrigeration access reported the lowest loss rates.

3.2. Purity testing, adulteration, and perceptions

Only 55.5% (95% CI 46.0–64.6) performed regular purity testing; 13.6% conducted none, and 10.9% tested occasionally. Laboratory testing (objective methods) was rare (17.3%). Reported adulterants were dominated by water (56.4%), followed by starch (15.5%), urea (4.6%), and detergent (2.7%).

Vendors acknowledging adulteration risk (“milk not pure”) exhibited higher Awareness Index scores (mean 2.9 vs 1.8; p < 0.001). Reporting or rejecting adulterated milk (70.9% combined) correlated positively with prior inspection (Cramér’s V = 0.31) and training (V = 0.27).

A counter-intuitive but statistically consistent pattern emerged: sellers conducting regular purity tests were less likely to describe their milk as “100% pure” (χ² = 9.46, p = 0.024), suggesting realism after exposure to testing results.

3.3. Hygiene and storage practices

Container cleaning “after every use” was practiced by 66.4%, daily by 19.1%, while 13.6% cleaned less frequently. Boiling (55.5%) and refrigeration (32.7%) dominated safety measures; pasteurization (4.6%) and preservative use (1.8%) were minimal.

Regression analysis demonstrated significant positive effects of training and inspection frequency on Hygiene Index (β = 0.42 and 0.35 respectively; p < 0.01), while lack of refrigeration independently predicted higher spoilage (IRR = 1.72; 95% CI 1.10–2.68). Vendors endorsing “boil before use” (Q31 = always) showed stronger hygiene scores (mean +0.47 SD; p = 0.009).

3.4. Awareness of disease transmission and vulnerable groups

Awareness varied across diseases: diarrhea 53.6%, bovine TB 43.6%, and hepatitis 35.5%. Synthetic-milk awareness reached 49.1%. Combined, the mean Awareness Index = 2.4 ± 1.1 (SD).

Training exposure strongly increased awareness (ρ = 0.58, p < 0.001). Multiple regression indicated that each unit increase in the Regulatory Compliance Index predicted +0.41 (95% CI 0.22–0.60) in Awareness Index, explaining 38% of its variance (adj. R² = 0.38).

Perception of safety for immunocompromised patients (Q19) was uncertain: 33.6% yes, 41.8% maybe, 8.2% no, 16.4% don’t know. Misalignment between high self-rated safety and low awareness scores signals knowledge–practice dissonance, warranting targeted education.

3.5. Consumer exposure and complaints

Milk for young children (<5 y) was perceived as safe by 45.5%, while 37.3% knew of its use for infants <2 years. Complaint prevalence was 10.0% yes, 17.3% occasional, and 32.7% no.

Binary logistic regression showed regular purity testing independently predicted fewer complaint reports (OR = 0.42; 95% CI 0.19–0.91). Vendors providing milk origin information (Q23) were more likely to replace or refund dissatisfied customers (χ² = 7.66, p = 0.042).

Under-18 consumption was nearly universal (49.1% yes), indicating a direct route of exposure for minors to unpasteurized milk.

3.6. Regulatory awareness and training

Only 39.1% were fully aware of milk-safety regulations; 21.8% were completely unaware. Government inspection had never occurred for 40% of vendors, while 53.6% reported no prior training. Training and inspection frequency were the strongest determinants of Hygiene Index (Spearman ρ = 0.59, p < 0.001) and of regular testing (χ² = 11.42, p = 0.008). Vendors with higher Regulatory Compliance Index were also more likely to reject adulterated milk (OR = 2.05; 95% CI 1.12–3.78).

3.7. Predictive modeling

Scenario projections indicated that if existing informal practices persist, microbial contamination could increase by ≈ 25% within five years. Adoption of boiling in ≥80% of households could reduce risk by ≈ 40%, while universal pasteurization could achieve > 99% reduction (pseudor² = 0.81, AIC = 112.4).

4. Discussion

This study provides one of the most comprehensive field-level insights into the behavioral, operational, and regulatory determinants of milk safety within Pakistan’s informal dairy sector. The evidence paints a portrait that is simultaneously pragmatic and alarming: a market sustained by experience rather than education, guided by sensory tradition rather than scientific validation, and operating at the intersection of economic survival and public-health vulnerability (Hussain et al., 2007).

While nearly one-third of vendors had more than five years of experience, this “practical literacy” rarely translated into microbiological safety. Experience showed an inverse correlation with spoilage, implying learned efficiency, but not necessarily hygienic advancement. Vendors’ operational intuition allowed them to minimize visible waste, yet their reliance on smell and color as purity indicators underscores a deeply entrenched cultural model of “safe milk”—one that privileges freshness over sterility (Ibrahim et al., 2023). This perception, while economically rational in a resource-limited setting, fails to address invisible microbial and viral contaminants.

Water adulteration, acknowledged by over half the vendors, is no longer an anomaly but a structural feature of the raw milk economy. It reflects both market pressure and infrastructural inadequacy. With margins razor-thin and refrigeration scarce, dilution serves as a survival tactic to offset spoilage losses (Kmiha et al., 2017). The detection of adulterants such as starch and urea, though less frequent, signals a dangerous escalation from benign dilution to chemical manipulation. These practices not only compromise nutritional integrity but also reveal a failure of regulatory deterrence, where the probability of inspection remains lower than the incentive to adulterate. The correlation between inspection frequency and ethical conduct (Cramér’s V = 0.31) empirically validates that governance, when visible, moderates malpractice.

Two-thirds of vendors cleaned their containers after every use, an impressive behavioral compliance rate by surface metrics, yet only a third used refrigeration and fewer than 5% employed pasteurization. This juxtaposition illustrates the “hygiene paradox”: a visual performance of cleanliness masking microbial risk (Lee et al., 2019). Vendors appear to equate visible hygiene with safety, failing to recognize that pathogens such as Mycobacterium bovis or Brucella abortus survive even in visually clear milk. This cognitive gap mirrors findings from similar studies in India and East Africa, where container hygiene was high but bacterial counts remained alarming due to inadequate boiling and refrigeration. Training emerged as the strongest positive determinant of hygienic behavior (β = 0.42, p < 0.01), reinforcing the argument that knowledge transfer, not merely experience, drives sustainable safety improvements.

The survey revealed a sobering reality: awareness of diarrhea was moderate (53.6%), but only 35.5% recognized hepatitis transmission through contaminated milk, and fewer than half understood the zoonotic risk of bovine tuberculosis. These gaps are not random—they reflect a curriculum and regulatory neglect of milk-borne viral and zoonotic education. The fact that one in three vendors believed milk was safe for immunocompromised patients and nearly 45% claimed safety for children under five years suggests a dangerous optimism bias. In effect, vendors become inadvertent vectors of misinformation, passing “perceived safety” onto consumers who assume traditional purity equates to biological safety.

The revelation that over one-third of vendors knowingly sell unpasteurized milk consumed by infants under two years is both ethically and epidemiologically significant (Yunus et al., 2019). In a population where neonatal and child malnutrition remain high, such exposure to unregulated raw milk represents a double jeopardy—nutritional dependence on a medium that is itself a vehicle of infection. The logistic regression finding that regular testing significantly reduced complaint rates (OR = 0.42) underscores that even minimal surveillance can translate into measurable consumer protection.

The informal dairy chain operates in a regulatory vacuum, 40% of vendors had never been inspected, and more than half had never received training. In this environment, self-regulation is unlikely to emerge organically. The paradoxical coexistence of 39% regulatory awareness and 60% inspection deficiency points to a fragmented oversight system where the idea of regulation exists without its execution. This vacuum erodes public trust; yet, the data also show that transparency—vendors who inform customers about milk origin, correlates with higher customer satisfaction and fewer complaints (p = 0.041). Thus, even in unregulated spaces, micro-ethics of transparency can act as a stabilizing force.

Education, both formal and informal, functions as the epidemiological determinant of modern food safety. Vendors with higher literacy exhibited significantly higher Awareness Index scores (r = 0.68, p < 0.01), aligning with global evidence that literacy predicts compliance with hazard-control behaviors. This link reframes milk safety not merely as a food-science issue but as a literacy and behavioral-economics challenge. In practical terms, milk safety interventions must evolve from punitive enforcement toward educational empowerment. Low-cost vendor certification programs, visual hygiene audits, and digital micro-training modules could yield outsized returns relative to the high transaction costs of traditional inspections.

The predictive model projecting a 25% rise in microbial contamination within five years—if current practices persist—transforms statistical data into a policy alarm. However, the same model demonstrates that simple behavioral shifts (universal boiling and pasteurization) could yield 40–99% reductions in contamination, equivalent to saving thousands of infection-related DALYs annually in similar urban catchments. These scenarios emphasize that Pakistan’s dairy safety challenge is not technical, it is behavioral. The infrastructure for pasteurization and refrigeration exists, but its utilization remains socially and economically constrained.

This study contributes to redefining milk safety as a behavioral ecosystem comprising knowledge, economic incentive, infrastructure, and regulation. Its implications extend beyond Islamabad and Rawalpindi, providing a replicable framework for other low- and middle-income countries navigating informal food systems. Key recommendations include, Institutionalizing vendor training and certification through municipal health departments or public-private dairy alliances. Establishing rapid milk-testing units at collection and retail nodes to introduce visible accountability. Incentivizing compliance through quality-linked subsidies or branding advantages for verified vendors. Embedding consumer education in school curricula and public-health messaging to reduce demand for unboiled milk.

5. Conclusion

The raw-milk trade, often dismissed as chaotic, in fact represents a sophisticated informal system governed by local heuristics and survival logic. Reform, therefore, cannot rely solely on punishment, it must harness this indigenous intelligence through education, trust, and co-regulation. This study illuminates not merely the deficits in hygiene but the opportunities within human adaptability. Transforming raw-milk safety in Pakistan will not come from imposing laboratories upon livelihoods, but from embedding knowledge within culture, a transformation where every liter of milk becomes not just a commodity, but a covenant of public health.

Data Availability Statement

All data underlying the results are available within the article or its supplementary materials.

Supplementary Material

Supplementary material accompanies this paper.

Table S1.

Detailed mapping and analytical coding of the 35-item raw-milk vendor questionnaire

This material is available as part of the online article from https://doi.org/10.1590/1519-6984.302815

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e-mail: [e-mail]; [e-mail]

Editor:

Marcelo A.M. Esquisatto

Publication Dates

• Publication in this collection
  19 Oct 2026
• Date of issue
  2026

History

• Received
  14 Nov 2025
• Accepted
  17 Feb 2026