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Title:   Author  item
                                            Sacco, Randyitem
                                            McGill, Jodiitem
                                            Palmer, Mitchellitem
                                            Lippolis, Johnitem
                                            Reinhardt, Timothyitem
                                            Nonnecke, Brian
  Submitted to: Book Chapter
                                    Publication Type: Book / Chapter
                                    Publication Acceptance Date: 11/1/2013
                                    Publication  Date: 1/20/2014
                                    Citation: Sacco, R.E., McGill, J.L., Palmer, M.V., Lippolis, J.D., Reinhardt, T.A., Nonnecke, B.J. 2014. Neonatal calf infection with respiratory syncytial virus: drawing parallels to the disease in human infants. In: Rosenberg, H.F., Domachowske, J.B., editors. Pneumoviruses and Metapneumoviruses. Basel, Switzerland: MDPI AG. p. 46-69.Interpretive Summary:
                                Technical Abstract: Respiratory syncytial virus (RSV) is the most common viral cause of childhood acute lower respiratory tract infections.  It is estimated that RSV infections result in more than 100,000 deaths annually worldwide.  Bovine RSV is a cause of enzootic pneumonia in young dairy calves and summer pneumonia in nursing beef calves.  Furthermore, bovine RSV plays a significant role in bovine respiratory disease complex, the most prevalent cause of morbidity and mortality among feedlot cattle.  Infection of calves or lambs with bovine RSV shares features in common with RSV infection in children, such as an age-dependent susceptibility.  In addition, comparable microscopic lesions consisting of bronchiolar neutrophilic infiltrates, epithelial cell necrosis, and syncytial cell formation are observed.  Further, our studies have shown an upregulation of pro-inflammatory mediators in RSV-infected calves and lambs, including IL-12p40 and CXCL8 (IL-8).  This finding is consistent with increased levels of IL-8 observed in children with BSV bronchiolitis.  Since rodents lack IL-8, neonatal calves can be useful for studies of IL-8 regulation in response to RSV infection.  We have recently found that vitamin D in milk replacer diets can be manipulated to produce calves differing in circulation 25-hydroxyvitamin D3.  The results to date indicate that although the vitamin D intracrine pathway is activated during RSV infection, pro-inflammatory mediators frequently inhibited by the vitamin D intacrine pathway in vitro are, in fact, upregulated or unaffected in lungs of infected calves.  This review will summarize available data that provide parallels between bovine RSV infection in neonatal calves and human RSV in infants.


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