A patient left lying next to a person who was "unconscious or possibly deceased" was among the alarming complaints made about hospitals to the health watchdog.
Grubby wards, cold food and forcing elderly patients to wear nappies were also complaints made to the Health Information and Quality Authority (Hiqa).
According to the unpublished complaints seen by the Irish Independent, hygiene and infection control are major concerns among patients and relatives who brought their grievances to Hiqa.
In one case, a patient who had surgery was placed in a recovery ward for two hours and felt unsafe and vulnerable.
Another patient next to them was completely alone, their "legs were visible" and no member of staff was checking on them.
The "patient appeared unconscious or possibly deceased", the report released under Freedom of Information revealed.
Another complaint related to treating all older patients with the one approach, and putting them in nappies when they were not needed.
"Family requested that this practice was not to be done. Every patient was given a plastic cup to drink from; the patient asked for a regular cup," it said.
Mobility and independence were not encouraged and the patient received just eight showers during a five-week stay.
Another complainant described water jugs as "filthy". They told how staff come in to clean the floor but "leave stale vomit and do not remove it".
A separate report related to a patient with double pneumonia, who was put in a ward with three others. When staff were asked to fill the soap dispenser, they were told the key was lost.
Hospital catering was criticised in another report with food served cold, while drinking water was always warm.
Hiqa said that 15 hospitals were inspected to discover how they are tackling the superbug carbapenemase-producing enterobacterales (CPE) and if they had made efforts to address the ongoing public health emergency.
Over the course of 2019, Hiqa observed an improvement in screening rates across public hospitals.
However, a number of factors were identified which had the potential to contribute to outbreaks of CPE. These included a lack of clarity among some staff of the requirements for routine assessment and screening for superbugs.
There was an absence of dedicated software to aid surveillance of infections in most hospitals and an inconsistent application of transmission-based precautions in some hospitals.
They found deficits in equipment hygiene and also in the physical environment of old buildings.
In response, the HSE said that in 2018-2019 the Departments of Health allocated around €7m to support enhanced infection control practice and control of antibiotic resistance.
Older infrastructure can also make cleaning and decontamination more difficult.