OBJECTIVE: To determine whether maternal influenza virus infection in the second and third trimesters of pregnancy results in transplacental transmission of infection, maternal auto-antibody production or an increase in complications of pregnancy. DESIGN: Case-control cohort study. POPULATION: Study and control cohorts were derived from 3,975 women who were consecutively delivered at two Nottingham teaching hospitals between May 1993 and July 1994. A complete set of three sera was available for 1,659 women. METHODS: Paired maternal ante- and postnatal sera were screened for a rise in anti-influenza virus antibody titre by single radial haemolysis and haemagglutination inhibition. Routine obstetric data collected during and after pregnancy were retrieved from the Nottingham obstetric database. Cord samples were tested for the presence of IgM anti-influenza antibodies, and postnatal infant sera were tested for the persistence of influenza-virus specific IgG. Paired antenatal and postnatal sera were tested against a standard range of auto-antigens by immunofluorescence. MAIN OUTCOME MEASURES: Classification of women as having definite serological evidence of an influenza virus infection in pregnancy (cases) or as controls. RESULTS: Intercurrent influenza virus infections were identified in 182/1,659 (11.0%) pregnancies. None of 138 cord sera from maternal influenza cases was positive for influenza A virus specific IgM. IgG anti-influenza antibodies did not persist in any of 12 infant sera taken at age 6-12 months. Six of 172 postnatal maternal sera from cases of influenza were positive for auto-antibodies. In all cases the corresponding antenatal serum was also positive for the same auto-antibody. There were no significant differences in pregnancy outcome measures between cases and controls. Overall, there were significantly more complications of pregnancy in the cases versus the controls, but no single type of complication achieved statistical significance. CONCLUSIONS: Influenza infection in the second and third trimesters of pregnancy is a relatively common event. We found no evidence for transplacental transmission of influenza virus or auto-antibody production in pregnancies complicated by influenza infections. There was an increase in the complications of pregnancy in our influenza cohort.
OBJECTIVE: To determine whether maternal influenza virus infection in the second and third trimesters of pregnancy results in transplacental transmission of infection, maternal auto-antibody production or an increase in complications of pregnancy. DESIGN: Case-control cohort study. POPULATION: Study and control cohorts were derived from 3,975 women who were consecutively delivered at two Nottingham teaching hospitals between May 1993 and July 1994. A complete set of three sera was available for 1,659 women. METHODS: Paired maternal ante- and postnatal sera were screened for a rise in anti-influenza virus antibody titre by single radial haemolysis and haemagglutination inhibition. Routine obstetric data collected during and after pregnancy were retrieved from the Nottingham obstetric database. Cord samples were tested for the presence of IgM anti-influenza antibodies, and postnatal infant sera were tested for the persistence of influenza-virus specific IgG. Paired antenatal and postnatal sera were tested against a standard range of auto-antigens by immunofluorescence. MAIN OUTCOME MEASURES: Classification of women as having definite serological evidence of an influenza virus infection in pregnancy (cases) or as controls. RESULTS: Intercurrent influenza virus infections were identified in 182/1,659 (11.0%) pregnancies. None of 138 cord sera from maternal influenza cases was positive for influenza A virus specific IgM. IgG anti-influenza antibodies did not persist in any of 12 infant sera taken at age 6-12 months. Six of 172 postnatal maternal sera from cases of influenza were positive for auto-antibodies. In all cases the corresponding antenatal serum was also positive for the same auto-antibody. There were no significant differences in pregnancy outcome measures between cases and controls. Overall, there were significantly more complications of pregnancy in the cases versus the controls, but no single type of complication achieved statistical significance. CONCLUSIONS:Influenzainfection in the second and third trimesters of pregnancy is a relatively common event. We found no evidence for transplacental transmission of influenza virus or auto-antibody production in pregnancies complicated by influenza infections. There was an increase in the complications of pregnancy in our influenza cohort.
Authors: Richard H Beigi; Kelong Han; Raman Venkataramanan; Gary D Hankins; Shannon Clark; Mary F Hebert; Thomas Easterling; Anne Zajicek; Zhaoxia Ren; Donald R Mattison; Steve N Caritis Journal: Am J Obstet Gynecol Date: 2011-03-09 Impact factor: 8.661
Authors: Katherine A Poehling; Peter G Szilagyi; Mary A Staat; Beverly M Snively; Daniel C Payne; Carolyn B Bridges; Susan Y Chu; Laney S Light; Mila M Prill; Lyn Finelli; Marie R Griffin; Kathryn M Edwards Journal: Am J Obstet Gynecol Date: 2011-02-23 Impact factor: 8.661
Authors: Timothy M Uyeki; Henry H Bernstein; John S Bradley; Janet A Englund; Thomas M File; Alicia M Fry; Stefan Gravenstein; Frederick G Hayden; Scott A Harper; Jon Mark Hirshon; Michael G Ison; B Lynn Johnston; Shandra L Knight; Allison McGeer; Laura E Riley; Cameron R Wolfe; Paul E Alexander; Andrew T Pavia Journal: Clin Infect Dis Date: 2019-03-05 Impact factor: 9.079
Authors: Joel G Ray; Allison J McGeer; Jennifer M Blake; Gerald Lebovic; Graeme N Smith; Mark H Yudin Journal: CMAJ Date: 2014-02-04 Impact factor: 8.262
Authors: Patrick Gérardin; Rachid El Amrani; Béatrice Cyrille; Marc Gabrièle; Philippe Guillermin; Malik Boukerrou; Brahim Boumahni; Hanitra Randrianaivo; Arnaud Winer; Jean-Fabien Rouanet; Michel Bohrer; Marie-Christine Jaffar-Bandjee; Pierre-Yves Robillard; Georges Barau; Alain Michault Journal: PLoS One Date: 2010-05-28 Impact factor: 3.240
Authors: Sarah J Short; Gabriele R Lubach; Alexander I Karasin; Christopher W Olsen; Martin Styner; Rebecca C Knickmeyer; John H Gilmore; Christopher L Coe Journal: Biol Psychiatry Date: 2010-01-15 Impact factor: 13.382
Authors: Regan N Theiler; Sonja A Rasmussen; Tracee A Treadwell; Denise J Jamieson Journal: Infect Dis Clin North Am Date: 2008-12 Impact factor: 5.982