Challenge 2: There is a high prevalence of multimorbidity in older adults. For instance, diuretics for heart failure can cause UTI-specific symptoms such as urinary urgency, frequency, and even incontinence. Cognitive impairment can make it difficult to obtain the key components of the history needed to make a UTI diagnosis.1
Lastly, there are aspects of normal aging physiology that complicate the detection of infections, such as the fact that older adults may not mount a “true” fever to meet criteria for a symptomatic UTI. Therefore, fever in institutionalized or frail community-dwelling older adults has been redefined as an oral temperature ≥ 100 °F, 2 repeated oral temperatures > 99 °F, or an increase in temperature ≥ 2 °F from baseline.3
So how to proceed with our case patient? The following questions helped guide the approach to her care.
Is this patient asymptomatic?
Yes. The patient presented with nonspecific symptoms (falls and delirium) with bacteriuria suggesting asymptomatic bacteriuria (ASB). These symptoms are referred to as geriatric syndromes that, by definition, are “multifactorial health conditions that occur when the accumulated effects of impairments in multiple systems render an older person vulnerable to situational challenges.”4
As geriatric syndromes, falls and delirium are unlikely to be caused by one process, such as a UTI, but rather from multiple morbid processes. It is also important to note that there is no evidence to support a causal relationship between bacteriuria and delirium or that antibiotic treatment of bacteriuria improves delirium.2,5
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