I want to isolate DNA and RNA from feline faecal samples in order to determine which pathogens (viruses, bacteria, fungi, parasites...) are present in the samples. The isolation will not be carried out until one week after collection, but immediate freezing is not possible (although 4°C fridge is available). Going through the literature, some recommend the use of RNAlater and some ethanol 95% for sample preservation, depending on which specific pathogen you want to isolate. The isolated DNA and RNA will be sent for NGS. Therefore, if you had to chose only one of both for this purpose, which one would you prefer?

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