Eucharistic Miracle of Tixtla, Mexico (2006)
Too thin a record to say either way.
The account
During a Eucharistic retreat, a host reportedly emitted a reddish substance that was subsequently identified by laboratory analysis as human blood of type AB, appearing to originate from within the host rather than from an external source.
Read the full account →Collapse the account ↑
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. 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."
Scientific Examination
The 2024 Kearse & Ligaj peer-reviewed paper reports that no control wafers were tested in parallel, immunochromatography documentation was insufficient, and no cell-specific marker validation was performed. The AB blood type is present in roughly 5% of the global population and recurs across multiple examined hosts. No laboratory outside the Castañon Gomez investigation network has replicated the findings.
Reviewer Notes
We weigh a claim on two things, kept separate from the story above.
Assessed by Miracles Jar AI
Blood typing confirmed on sample; investigator credibility concerns and no independent replication prevent stronger conclusion.
The verdict: Blood typing confirmed on sample; investigator credibility concerns and no independent replication prevent a stronger conclusion. The case is genuinely uncertain — there are real evidentiary threads on both sides, but the methodological gaps are too significant to lean toward authenticity.
The detail that the blood appeared to originate from the interior of the host "rather than having been applied externally" is a point proponents treat as central. The directionality interpretation is contested; the methodology for determining directionality of flow was not fully documented.
Bishop Zavala Castro's 2013 pastoral letter recognized a "supernatural character." The Church's investigative standard, however, is theological rather than forensic-scientific, which limits what that recognition can establish about the physical claim.
On the recurrence of the AB blood type across investigated hosts, the question is whether this reflects contamination from the same investigative network's personnel rather than independent confirmation — a weighing judgment the evidence cannot currently resolve.
Evidence assessment:
- A Mexican laboratory identified human hemoglobin and human DNA of AB+ blood type in the sample — a straightforward technical finding, though contamination from handlers is a recognized alternative.
- Blood appeared to emanate from within the host substance rather than from an external source — the interpretation is contested; the methodology for determining directionality of flow was not fully documented.
- The investigation was led by Castañon Gomez, a clinical psychologist with known credibility concerns, rather than an independent scientific body; selection of examiners was influenced by the investigator.
- No control wafers were tested in parallel; immunochromatography methodology was insufficiently documented. Per Kearse & Ligaj 2024, this means the analysis cannot distinguish a miracle from contamination or fungal pigment without controls — a serious gap.
Reasoning summary: Lab analysis by Mexican scientists identified human hemoglobin and AB+ blood, appearing to come from within the host. Investigation was again led by Castañon Gomez, whose credibility is contested. Chain of custody in Tixtla has been described as better-documented than Buenos Aires, but no independent third-party replication has been performed, and the possibility of fungal pigmentation or contamination was not systematically excluded with parallel controls.
Evidence ledger — what the verdict rests on
Mexican laboratory identified human hemoglobin and human DNA of AB+ blood type in the sample
Blood typing is technically straightforward; contamination from handlers is a recognized alternative
Blood appeared to emanate from within the host substance rather than from an external source
This interpretation is contested; methodology for determining directionality of flow was not fully documented
Investigation led by Castañon Gomez, a clinical psychologist with known credibility questions
Not an independent scientific body; selection of examiners influenced by investigator
No control wafers were tested in parallel; immunochromatography methodology insufficiently documented
Per Kearse & Ligaj 2024; cannot distinguish miracle from contamination or fungal pigment without controls
What would raise this score: Adversarial scrutiny with real power to expose deception — hostile investigators, controlled conditions — coming back clean would raise the evidence bar.
What would lower it: A confession, an exposed method, or a documented financial motive would drive the evidence bar toward zero.
How this works
We keep two questions apart on purpose — so a thin record can’t make an impossible thing look proven, and a strong record can’t dress up an ordinary one as a miracle. First: Could nature explain it? (taking the account as true for the moment.) The question is whether nature could produce this at all — assuming, for the moment, the events are true as described. Second: is there real evidence it happened? A claim only stands out when both hold up — and we never call anything certain either way. How ratings work →
The natural explanation
The leading natural account for this case is deception: hoaxes, cold reading & stagecraft. Read what it explains — and where it stops.
Sources
Tagged by proximity to the event. Primary sources are direct or contemporaneous; tertiary are downstream retellings.
- 1.Primaryinvestigation
"Eucharistic Miracle of Tixtla, Mexico - October 21, 2006", 2010· no public link
Investigation report summary; therealpresence.org/eucharst/mir/english_pdf/Tixtla2.pdf
- 2.Secondaryother
"Medical Investigation of the Eucharistic Miracle in Tixla Mexico with Dr. Carlos Parellada", 2022· no public link
Describes analysis methodology; heartsoftheholyfamily.org
- 3.Secondaryacademic
Kearse K, Ligaj F, "Scientific Analysis of Eucharistic Miracles: Importance of a Standardization in Evaluation", 2024· no public link
Identifies insufficient immunochromatography documentation and absence of control wafers in Tixtla analysis
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