The horse developed pleuropneumonia – a bacterial respiratory an infection – after the race.
The an infection resulted within the onset of sepsis, which is “more likely to have been a key issue” in the reason for demise.
Blood checks taken on the day of the race indicated that the an infection had not been current within the horse on raceday.
The British Horseracing Authority (BHA) mentioned the autopsy examination was simply “one half” of their reviewing means of any fatality and that Celebre D’Allen’s demise could be analysed intimately.
Celebre D’Allen was a 125-1 shot on the Nationwide, which was received by jockey Patrick Mullins on Nick Rockett.
On Tuesday, it was additionally introduced that Mullins has been given an eight-day ban after his journey was referred to the Whip Evaluation Committee.
The newbie jockey, 35, breached the whip guidelines throughout the race, utilizing his whip eight occasions after the ultimate fence when the restrict in leap racing is seven.
He will probably be suspended for eight separate days together with 23 and 25 April.
Celebre D’Allen’s demise prompted criticism from animal rights teams, with Animal Rising saying the game of horse racing was guilty for the horse’s demise.
Animal Help mentioned it was “disgraceful” to permit a horse of Celebre D’Allen’s age to be ridden within the “most gruelling race within the nation”.
The BHA mentioned there had been 24 13-year-old horses since 2000 who’ve competed within the Grand Nationwide, with no earlier fatalities.