Eucharistic Miracle of Tixtla, Mexico (2006)

On October 21, 2006, during a Eucharistic retreat in Tixtla, Guerrero, a reddish substance was observed emerging from a consecrated Host during distribution. Sister Evangelina Ramona Caballero witnessed the transformation. The local bishop informed Rome and commissioned an investigation.

Laboratory Analysis

Investigation was coordinated by Dr. Ricardo Castañon Gomez beginning in 2009. Mexican scientists identified the reddish substance as human blood containing hemoglobin and human DNA, typed as AB+. Analysis reportedly showed the blood appearing to originate from the interior of the host rather than having been applied externally — a detail proponents cite as central. By February 2010, the internal layers were described as containing fresh blood despite the 2006 date of origin.

Church Recognition

On October 12, 2013, Bishop Alejo Zavala Castro issued a pastoral letter declaring the event a "Divine Sign" of "supernatural character." This is the formal highest-level Church recognition, though the Church's investigative standard is theological, not forensic-scientific.

Methodological Gaps

The 2024 Kearse & Ligaj peer-reviewed paper identifies that no control wafers were tested in parallel, immunochromatography documentation was insufficient, and no cell-specific marker validation was performed. The AB blood type — present in roughly 5% of the global population — recurs across multiple examined hosts, raising the question of whether this reflects contamination from the same investigative network's personnel rather than independent confirmation. No laboratory outside the Castañon Gomez investigation network has replicated the findings.