Tests were conducted to determine how many parasites (abbreviated as Par.) there were in the test subject’s blood. There were categories for this: a + underlined once or twice, as well as a ++. If there were no pathogens in the blood, this was noted with a zero. On some cards, this information is followed by the prisoner’s body temperature. The prisoner clerk Eugène Ost recalled that the prisoners’ temperature and pulse rate were measured every three hours, even through the night. The results of weekly urine tests were also recorded on the file cards.