Not got a good brain anymore Captain Helen, but as I understand it what they are basically saying is that 2 different types of GI parasites have been found.
a) Cocciodiosis - as you rightly say the specific type has not yet been identified.
b) One of 2 types of parasitic worm which lives in the stomach.
Neither of these parasites are a form of EC.
Because 2 different parasites have been found, & at present they
may not be sure which one was causing the problems, at this point of time in "scientific purism", they cover both eventualities, with the general term "gastrointestinal parasitic disease."
I know that it's difficult for you, but it is so important for improving our understanding of disease that lab test only state what they can actually prove.
I think that many people don't understand that tests have their limitations too. In this situation a vet/ doctor has the advantage of being able to combine the course of an illlness, (very rapid) usually examination findings, as well as tests. The combination results in an "overwheming probability" diagnosis in most cases. This is what they relay to us.
(An example of doctors failuring to be scientifically precise is - we were isolating helicobacter pylori from patients with peptic ulcer back in 1975 & in a scientific lack of discipline completely ignoring it as harmless. Several years later, a more disciplined Australian doctor realised that H pylori was actually
causing the ulcers. The West refused to believe him for a long time!
As a result we were giving totally inappropriate treatments with poor results to patients. When we accepted the truth, treatment was revolutionised, infinately more effective, & simpler)
I would expect the next step to be further examination of tissues under the microscope, now that they know where to look.
Perhaps your own main concern at present, is how to prevent both infections spreading to other rabbits.
I can only say that when the unexpected arises, lab tests can take a long time, & may not always be conclusive.
I think that Thumper's tests took about
4 months. Marie & Elizabetta Manicelli generously funded some very expensive tests because that type of TB had not been seen in rabbits before & was substantially different from the norm. In fact they ran out of the necessary tissue to repeat the DNA typing of the TB bacillus. We were left with an "overwhelming probability".
ETA Labs can be overwhelmed with work. I suspect that they prioritise the living over the deceased.
Geoff'sPeople with her experience in lab work will be able to give a more accurate answer than I can.