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An In vitro Model to Study Immune Responses of Human Peripheral Blood Mononuclear Cells to Human Respiratory Syncytial Virus Infection
Published on: December 10, 2013
Predicting respiratory syncytial virus hospitalisation in Australian children
Carole A Reeve1, John S Whitehall, Petra G Buettner
1Department of Neonatology, The Townsville Hospital, Townsville, Queensland, Australia.
Insights
Low birthweight infants, especially those with siblings, are at high risk for respiratory syncytial virus (RSV) infection hospitalisation. Indigenous infants face heightened risk due to multiple exposure factors.
Area of Science:
- Pediatric Infectious Diseases
- Public Health
- Epidemiology
Background:
- Limited data exists on respiratory syncytial virus (RSV) infections in Australian infants, with a particular gap concerning Indigenous children.
- Understanding risk factors for severe RSV disease is crucial for targeted prevention strategies.
Purpose of the Study:
- To identify specific infant populations at elevated risk for hospitalization due to RSV-positive lower respiratory tract infections.
- To inform targeted prevention efforts, such as palivizumab administration, for high-risk infants.
Main Methods:
- A case-control study analyzed 271 medical records of infants hospitalized with RSV-positive lower respiratory tract infections.
- Risk factors were identified using multiple logistic regression and classification and regression tree (C&RT) analyses.
- Controls were randomly selected from infants born at The Townsville Hospital during the study period.
Main Results:
- Independent predictors for hospitalization included birthweight under 2500g, maternal parity, and marital status.
- C&RT analysis pinpointed infants born weighing <2500g with older siblings as the highest-risk group.
- Additional risk factors identified were single motherhood and smoking; Indigenous infants showed higher exposure to these risk factors.
Conclusions:
- Infants born weighing <2500g, particularly those with siblings, are prime candidates for RSV prevention.
- All Indigenous infants should be considered high-risk for RSV hospitalization due to their increased exposure to identified risk factors.
Background:
There is limited information on respiratory syncytial virus infections among Australians, particularly those of Indigenous descent.
Aim:
This study identifies groups of infants at risk of hospitalisation with respiratory syncytial virus-positive lower respiratory tract infection who may be targeted for prevention with palivizumab.
Methods:
Case control study: the case notes of 271 children with cases of respiratory syncytial virus-positive lower respiratory tract infection admitted to The Townsville Hospital were studied for risk factors. Controls were chosen randomly from babies born in The Townsville Hospital during that period. Multiple logistic regression analysis and classification and regression tree analysis were used to identify risk factors.
Results:
Multiple logistic regression analysis identified birthweight <2500 g, maternal parity and marital status to be independent predictors of hospitalisation with respiratory syncytial virus-positive lower respiratory tract infection. Classification and regression tree analysis identified babies born weighing <2500 g who possessed older siblings to be at highest risk. Single mothers and smoking were additional risk factors. Indigenous babies were significantly more likely to be exposed to all of the identified risk factors.
Conclusion:
Babies born weighing <2500 g (especially with siblings) could be targeted for prevention. All Indigenous babies should be considered at high risk because of their exposure to multiple risk factors.
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