Prospective study of nosocomial rotavirus infection in a paediatric hospital

Risk factors and cost of nosocomial infections in pediatric patients with traumatic brain injury

OBJECTIVE

This study aimed to determine the factors that increase nosocomial infections (NIs) in pediatric patients with traumatic brain injury (TBI) and the effects on both treatment cost and length of hospital stay.

METHODS

We performed a case-control study on patients admitted to the pediatric intensive care unit (PICU) with (n=66) or without (n=120) TBI between 2012 and 2014. The risk factors, length of stay, and costs of NIs were determined.

RESULTS

Data for 186 patients were analyzed. One hundred and twenty patients were controls (54 males vs. 66 females), while 66 were cases (27 males vs. 39 females). Seventeen out of the 186 PICU patients had NIs. About 7.6% of TBI patients had infections whereas 10% of control groups had NIs (p=0.58). The most isolated microbial agent was Acinetobacterbaumannii (four cases). Thirteen (76.5%) out of the 17 infections were catheter-related bloodstream infections. The mean expenses per PICU patient were $762, with an additional cost of $2081 for patients with nosocomial contamination.

CONCLUSION

The use of catheters was the most critical risk factor for NIs in our study probably underestimated the cost for several reasons. Nevertheless, the findings supported our hypothesis about the additional burden of nosocomial spread on PICU patients. This study's results should help provide evidence on cost-effectiveness or calculate the cost-benefit ratio of reducing NIs in children.

Modeling nosocomial transmission of rotavirus in pediatric wards

Nosocomial transmission of viral and bacterial infections is a major problem worldwide, affecting millions of patients (and causing hundreds of thousands of deaths) per year. Rotavirus infections affect most children worldwide at least once before age five. We present here deterministic and stochastic models for the transmission of rotavirus in a pediatric hospital ward and draw on published data to compare the efficacy of several possible control measures in reducing the number of infections during a 90-day outbreak, including cohorting, changes in healthcare worker-patient ratio, improving compliance with preventive hygiene measures, and vaccination. Although recently approved vaccines have potential to curtail most nosocomial rotavirus transmission in the future, even short-term improvement in preventive hygiene compliance following contact with symptomatic patients may significantly limit transmission as well, and remains an important control measure, especially where resources are limited.

Prevention of surface-to-human transmission of rotaviruses by treatment with disinfectant spray

A model was developed to examine the effects of disinfectants on the transmission of infectious rotavirus from a dried surface to humans. The initial experiments were designed to find a method of preserving rotavirus infectivity during drying. Culture-adapted human rotavirus (CJN strain) was dried at room temperature in different organic suspensions, including fecal matter, several laboratory media, and nonfat dry milk (NDM). Recoveries of infectious virus were then compared. Fecal matter provided little protection in this study relative to distilled water, but the other suspensions were quite protective, especially NDM, which consistently allowed recoveries of greater than 50%. When 10(3) focus-forming units of unpassaged CJN virus were dried in NDM and administered to subjects who licked the dried material, 100% (8 of 8) became infected. The effect of Lysol brand disinfectant spray (LDS) was next examined. Although NDM provided some protection against inactivation by LDS, spraying under conditions recommended by the manufacturer consistently caused the CJN virus titer to decrease greater than 5 log10. Consumption of CJN virus (10(3) focus-forming units) sprayed with LDS caused no infection in 14 subjects, whereas 13 of 14 subjects who consumed the unsprayed virus became infected (P less than 0.00001). The methods developed in this study could be used to test the effects of other disinfectants on the spread of infectious rotavirus from inanimate surfaces to humans.