Giulia Costa Detects Hidden Malnutrition in Displaced Population, Preventing Crisis

The moment

In March 2023, a surge of internally displaced persons (IDPs) arrived in Lyon, fleeing regional conflicts that had destabilised neighboring areas. Many of these individuals settled in informal, makeshift shelters—temporary solutions that offered little in the way of sanitation, stability, or nutritional security. Humanitarian agencies swiftly deployed assessment teams to evaluate health needs, but initial visual inspections and basic anthropometric measurements suggested no overt signs of malnutrition. Despite this, some health professionals involved in the response harboured concerns that underlying nutritional issues might be slipping through the cracks, particularly among vulnerable groups such as children and pregnant women. It was within this context that Giulia Costa, a senior nutrition specialist with over a decade of experience in humanitarian aid and public health assessment, was called upon to provide her expertise.

Why years of experience made the difference

Giulia’s extensive background in field nutrition assessment had ingrained in her a nuanced understanding that malnutrition is often more insidious than it appears. She had spent years working in diverse crisis settings, developing a keen sense for pattern recognition—an ability to see beyond surface-level data and identify subtle signs of deficiency. Her familiarity with anthropometric tools like mid-upper arm circumference (MUAC) measurements was complemented by her proficiency in biochemical screening, particularly dried blood spot (DBS) sampling, which allows for rapid, minimally invasive testing of micronutrient levels in field conditions.

What distinguished Giulia was her capacity to interpret these measurements in the context of local dietary practices and epidemiological patterns. She knew that in populations experiencing displacement, deficiencies like iron, vitamin D, or zinc could be present even when children appeared well-nourished visually. She understood that micronutrient deficiencies often manifest as subclinical conditions—no obvious swelling, no overt wasting—yet they silently compromise immune function and development. Her years of on-the-ground experience had also taught her to trust her pattern recognition: noticing subtle inconsistencies in community health indicators, or atypical results in biochemical data, could be early warning signs of larger problems. This depth of practical knowledge was what allowed her to look beyond the initial assessments and consider the possibility of hidden malnutrition.

What happened next

Recognising the potential for underlying deficiencies, Giulia recommended a more targeted assessment approach. She coordinated with local health authorities and field teams to implement a sampling strategy that included MUAC measurements of a representative subset of the displaced population—focusing on children under five and pregnant women—and collected dried blood spot samples from the same groups. The DBS method, validated for field use, enabled her to analyze key micronutrients such as serum ferritin (for iron stores), vitamin D (for bone health and immune function), and zinc (critical for growth and immune response).

Analysis of the biochemical data revealed a significant proportion of children and pregnant women with subclinical deficiencies: low serum ferritin levels indicating iron stores were depleted, vitamin D levels below optimal thresholds, and zinc levels suggestive of compromised immune resilience. These findings were not apparent through visual assessment alone, underscoring the importance of her expertise in interpreting biochemical markers in conjunction with anthropometric data.

Based on these results, Giulia collaborated with local health authorities to develop a targeted intervention plan. This included the distribution of micronutrient-fortified supplementary foods, micronutrient tablets for pregnant women, and community education sessions emphasizing dietary diversity within the constraints of their temporary shelter conditions. She also recommended periodic follow-up assessments to monitor progress and adjust interventions as needed.

Thanks to these measures, the displaced community’s health status stabilized over subsequent weeks. The early detection of subclinical deficiencies prevented the onset of deficiency-related illnesses such as anemia, scurvy, and zinc deficiency syndromes. Hospital admission rates for malnutrition-related conditions remained low, and the community's overall resilience improved, demonstrating the effectiveness of a proactive, expert-guided response.

What this tells us

This case exemplifies how deep field experience and technical expertise are essential in humanitarian health assessments. Recognising the signs of hidden malnutrition requires more than standard visual checks; it demands pattern recognition, knowledge of micronutrient deficiencies, and the ability to interpret biochemical data in context. When experts like Giulia apply these skills, they enable early, targeted interventions that can prevent larger health crises, ultimately saving lives and preserving community stability in complex emergencies.