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Article Abstract
Background: There is a lack of comprehensive, large cohort studies investigating the predictors for severity and hospitalization in human granulocytic anaplasmosis (HGA).
Methods: We conducted a retrospective cohort study including all cases of HGA identified by positive blood Anaplasma polymerase chain reaction (PCR) at the Mayo Clinic Laboratory, Rochester between 2011 and 2021. Multivariable logistic regression was performed to evaluate risk factors associated with hospitalization.
Results: A total of 465 cases were identified. Of those, 67% (n = 312) were managed in the outpatient setting. Hospitalized patients (n = 153, 33%) were more likely to be older (median age of 71 vs 61; p ≤ 0.001) and immunocompromised (17% vs 7%; p ≤ 0.001). The triad of leukopenia, thrombocytopenia and transaminitis was observed in 24% of the cases, but was associated with risk of hospitalization (OR 1.78, 95%CI 1.05-3.03; p ≤ 0.033). The presence of a co-infection did not impact mortality or hospitalization.
Conclusion: The risk factors for hospitalization in patients with HGA include altered mental status, higher ANC, advanced age, comorbidities, and immunosuppression. The classic hematological and biochemical profile may be absent in the majority of cases. Co-testing may be of higher benefit in select cases.
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| http://dx.doi.org/10.1093/cid/ciaf171 | DOI Listing |
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