Eucharistic miracle
In general, reported Eucharistic miracles usually consist of unexplainable phenomena such as consecrated Hosts visibly transforming into myocardium tissue, being preserved for extremely long stretches of time, surviving being thrown into fire, bleeding, or even sustaining people for decades.
As with other private revelations, such as Marian apparitions, belief in approved miracles is not mandated by the Catholic Church, but often serves to reassure believers of God's presence or as the means to "send a message" to the population at large.
[citation needed] The Catholic Church differentiates between true miracles and occurrences that are explainable by natural causes.
For example, in 2006, the Roman Catholic Diocese of Dallas gave over a Eucharist host that turned red while in a glass for the analysis by two University of Dallas biology professors who concluded it was naturally explicable, as Bishop Charles Victor Grahmann wrote that "… the object is a combination of fungal mycelia and bacterial colonies that have been incubated within the aquatic environment of the glass during the four-week period in which it was stored in the open air.
Scholastic philosophical terminology was used but is not a part of the dogma that defined Christ's presence for the Roman Catholic Church at the Council of Trent.
"[9]Some denominations, especially Lutherans, have similar beliefs regarding the Eucharist and the Real Presence, though they reject the Roman Catholic concept of transubstantiation, preferring instead, the doctrine of the sacramental union, in which "the body and blood of Christ are so truly united to the bread and wine of the Holy Communion that the two may be identified.
...In this sacrament the Lutheran Christian receives the very body and blood of Christ precisely for the strengthening of the union of faith.
[citation needed] Brazilian Servant of God Floripes Dornellas de Jesus reportedly lived for 60 years feeding with Eucharist only.
Teresa Neumann, the famed Catholic Stigmatic from Bavaria subsisted on no solid food but the Holy Eucharist from 1926 until her death in 1962 some 36 years later.
The angel, "whiter than snow, ... quite transparent, and as brilliant as crystal in the rays of the sun," proffered the Eucharist host and chalice to the Holy Trinity in reparation for the sins committed against Jesus Christ, then administered the Eucharist to the visionaries and instructed them to make acts of reparation.
A Bohemian priest who doubted the doctrine of transubstantiation celebrated Mass at Bolsena, a town north of Rome.
The blood from the host fell onto the altar linen in the shape of the face of Jesus as traditionally represented, and the priest came to believe.
The next morning, one of the women went to rake the fire and noticed the Host sitting on the grate, unscathed and surrounded by a light.
[28] According to another story, a farmer in Bavaria took a consecrated Host from Mass to his house, believing that it would bring him and his family good fortune.
Caesarius also recounts more extraordinary tales, such as bees creating a shrine to Jesus after a piece of the Eucharist was placed in a beehive,[31]: 130 a church that was burnt to ashes while the pyx containing the Eucharist was still intact,[31]: 136 and a woman who found the Host transformed into congealed blood after she stored it in a box.
[31]: 142 In 2016, in Aalst, a small town in Flanders (Belgium), a 200-year-old[32] eucharistic host in a monstrance, suddenly showed blood red colour.
Professor Liesbeth Jacxsens has offered to scientifically investigate the host and thinks the colour could be caused by Serratia marcescens, Monilia sitophila or Oidium.
