1881. Impact of Respiratory Viral Panel Polymerase Chain Reaction (RVP-PCR) Assay Turnaround Time on Length of Stay and Antibiotic Use in Patients with Respiratory Viral Illnesses
Session: Poster Abstract Session: Antibiotic Stewardship: Diagnostics
Saturday, October 29, 2016
Room: Poster Hall

Respiratory viral illnesses are among the most common reason for hospitalization and account for a large proportion of inappropriate antibiotic use. The availability of respiratory viral panel by polymerase chain reaction (RVP-PCR) has provided a reliable means of diagnosis. The primary objective of this study was to evaluate the effect of RVP-PCR tests with rapid turnaround times on duration of antibiotic use and length of stay (LOS) in the hospitalized patients.


In January 2015, the RVP-PCR assay at our institution was switched from respiratory viral panel (RVP) by Luminex xTag® to rapid respiratory panel (rapid RP) by Biofire FilmArray®. The turnaround time for the rapid RP assay was shorter (12 hours) compared with the RVP assay (24 hours). We performed a retrospective chart review of electronic medical records of patients (18 years or older) who had a RVP-PCR ordered within a 1 year time period before or after the assay switch. Patients who were pregnant, had received antibiotics within 30 days of admission, were not discharged by end of study period, or had not completed antibiotics by end of study period, were excluded. Data obtained included baseline demographics, antibiotic use, LOS, and lab results including cultures. The Mann-Whitney U test and the Fisher’s exact test were used for continuous and categorical factors, respectively. Statistical analysis was completed using SAS version 9.4 (Cary, NC).


Data was obtained from a total of 140 patients (70 each in the RVP and rapid RP group). Of these, 25 (35.7%) in the RVP group and 28 (40.0%) in the Rapid RP group had a positive RVP-PCR. Baseline characteristics were similar except for a higher percentage of immunocompromised patients in the RVP group (35.7% vs. 18.6%; = 0.036). Primary outcomes are shown in table 1.

Table 1. Primary Outcomes


Rapid RP

p value

LOS in days

4.5 (3 - 9)

5 (3 - 9)


Antibiotic use in days

4 (2 - 7)

5 (1 - 7)


Data presented as median (IQR: Q1 – Q3)


Despite faster turnaround time, we observed no statistically significant difference in duration of antibiotic use or LOS between RVP and rapid RP groups. Small sample size, confounding variables, and a small difference of 12 hours between turnaround times, may have contributed to this result.

Sebastian Choi, PharmD1, Rubiya Kabir, PharmD, BCPS1, Pranisha Gautam-Goyal, MD2 and Prashant Malhotra, MBBS, FACP, FIDSA2, (1)Pharmacy, North Shore University Hospital, Manhasset, NY, (2)Infectious Diseases, North Shore University Hospital, Manhasset, NY


S. Choi, None

R. Kabir, None

P. Gautam-Goyal, None

P. Malhotra, None

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