Key points from article :
Sponges contain bacteria from hundreds of different operational taxonomic units (OTUs).
Some risk group 2 (RG2) found that may cause disease, but only if enter body via wounds or burns.
Most bacteria are harmless or have a useful role in biological processes.
Heating sponges in microwaves to kill bacteria doesn't work particularly well.
Recommendation is to replacing sponges and washing up clothes weekly.
The study was published in the Nature Scientific Reports journal.
