A New Standard for Measuring Passive Immunity
For decades, the dairy industry has relied on a simple assumption: More IgG equals better immunity.
The problem is that total IgG has never been a reliable proxy for pathogen protection. Two samples with identical IgG levels can have entirely different immune value, because only specificity determines what those antibodies actually bind to and neutralize.
IgScan is the first diagnostic built to quantify both antibody concentration and antigen specificity, revealing the true immune performance of colostrum, replacers, and milk.
Research presented in 2023 showed that high IgG does not always correlate with protection against early-life calf pathogens. In fact, specificity varies significantly due to:
Only 35.5 percent of calves reach “excellent” serum IgG levels by conventional standards, and even this metric fails to predict specificity.
The outcome is widespread Failure of Transfer of Passive Immunity (FTPI), despite compliance with industry best practices.
IgScan measures what no other tool can.
Existing diagnostics—including Brix refractometers, hydrometers, and serum IgG tests—measure quantity, not quality. None can determine whether antibodies recognize:
IgScan solves this by using a proprietary assay that maps antibody binding to a panel of calfhood disease antigens. This dual measurement (total IgG/IgY plus specificity) provides a fully characterized immune profile of any sample.
The data prove what the industry has long suspected but could never quantify: antibody specificity is inconsistent, highly variable, and often inadequate, even when IgG appears high.
1. Quantifies total IgG and IgY
The assay reports absolute levels, allowing direct comparison across batches, brands, and formulations.
2. Profiles antibody specificity to key pathogens
Each antigen on the panel reveals a titer curve showing how strongly the antibodies bind and at what effective concentration.
3. Benchmarks immune performance
IgScan compares relative titers per milliliter or per gram, depending on sample type, revealing strengths, weaknesses, and blind spots in immune coverage.
4. Provides a treatment or formulation recommendation
The report includes a targeted EggTek-C adjustment that increases the missing titers for the specific pathogens where gaps were detected.
This is the first closed-loop system that diagnoses immune gaps and offers a direct path to improving them.
Charts shown in early data presentations demonstrate dramatic titer differences between samples with identical IgG values. In some cases, a “high IgG” sample exhibits poor specificity to critical pathogens like E. coli K99 or Rotavirus.
Conversely, some lower-IgG samples show surprisingly strong specificity.
This unexplained variability has driven inconsistent performance and FTPI rates for years. IgScan is the first tool capable of detecting it objectively.
In comparative analyses, replacers with nearly identical protein and IgG composition displayed non-overlapping specificity profiles, indicating fundamentally different immune value despite similar labels.
Egg-derived IgY brings additional immunity signatures absent from bovine IgG. IgScan simultaneously measures both:
This dual measurement allows formulators to assess:
For innovators, this becomes a tool to design next-generation immune-forward calf nutrition products.
IgScan’s methodology is supported by:
The combination of quantitative IgG/IgY measurement plus specificity assessment represents a new scientific standard for calf immunity diagnostics.
You can now quantify immune performance the same way you quantify nutrition. This enables better formulations, clearer differentiation, and evidence-backed claims.
You gain a diagnostic tool capable of explaining field-level health patterns that IgG alone cannot. Scours, inconsistencies, and FTPI clusters finally have measurable immune signatures.
You will gain practical clarity on which products provide real protection—and why.
This is the first time the industry can measure the true immune value of colostrum, replacers, and milk.
It represents a fundamental transition from nutritional-only thinking to immunity-informed formulation and management.
IgScan is where that transition begins.
