Talk:Abnormal Development - Viral Infection

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On this website the Discussion Tab or "talk pages" for a topic has been used for several purposes: References - recent and historic that relates to the topic Additional topic information - currently prepared in draft format Links - to related webpages Topic page - an edit history as used on other Wiki sites Lecture/Practical - student feedback Student Projects - online project discussions. Links: Pubmed Most Recent | Reference Tutorial | Journal Searches Glossary Links Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link Cite this page: Hill, M.A. (2024, May 5) Embryology Abnormal Development - Viral Infection. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Talk:Abnormal_Development_-_Viral_Infection

2012

Mother-to-child transmission of human immunodeficiency virus in aten years period

Reprod Health. 2011 Nov 30;8:35. doi: 10.1186/1742-4755-8-35.

Delicio AM, Milanez H, Amaral E, Morais SS, Lajos GJ, e Silva JL, Cecatti JG. Source Department of Obstetrics and Gynecology, School of Medicine, University of Campinas, Brazil. adri36_unicamp@hotmail.com

Abstract

OBJECTIVES: to evaluate mother-to-child transmission (MTCT) rates and related factors in HIV-infected pregnant women from a tertiary hospital between 2000 and 2009. SUBJECTS AND METHOD: cohort of 452 HIV-infected pregnant women and their newborns. Data was collected from recorded files and undiagnosed children were enrolled for investigation. Statistical analysis: qui-square test, Fisher exact test, Student t test, Mann-Whitney test, ANOVA, risk ratio and confidence intervals. RESULTS: MTCT occurred in 3.74%. The study population displayed a mean age of 27 years; 86.5% were found to have acquired HIV through sexual contact; 55% were aware of the diagnosis prior to the pregnancy; 62% were not using HAART. Mean CD4 cell-count was 474 cells/ml and 70.3% had undetectable viral loads in the third trimester. HAART included nevirapine in 35% of cases and protease inhibitors in 55%; Zidovudine monotherapy was used in 7.3%. Mean gestational age at delivery was 37.2 weeks and in 92% by caesarian section; 97.2% received intravenous zidovudine. Use of AZT to newborn occurred in 100% of them. Factors identified as associated to MTCT were: low CD4 cell counts, elevated viral loads, maternal AIDS, shorter periods receiving HAART, other conditions (anemia, IUGR (intra uterine growth restriction), oligohydramnium), coinfecctions (CMV and toxoplasmosis) and the occurrence of labor. Use of HAART for longer periods, caesarian and oral zidovudine for the newborns were associated with a decreased risk. Poor adhesion to treatment was present in 13 of the 15 cases of transmission; in 7, coinfecctions were diagnosed (CMV and toxoplasmosis). CONCLUSION: Use of HAART and caesarian delivery are protective factors for mother-to-child transmission of HIV. Maternal coinfecctions and other conditions were risk factors for MTCT.

PMID 22129112

Herpes simplex virus infection in pregnancy

Infect Dis Obstet Gynecol. 2012;2012:385697. Epub 2012 Apr 11.

Straface G, Selmin A, Zanardo V, De Santis M, Ercoli A, Scambia G. Source Department of Obstetrics and Gynaecology Policlinico Abano Terme, 35031 Abano Terme (PD), Italy. gianluca.straface@casacura.it

Abstract

Infection with herpes simplex is one of the most common sexually transmitted infections. Because the infection is common in women of reproductive age it can be contracted and transmitted to the fetus during pregnancy and the newborn. Herpes simplex virus is an important cause of neonatal infection, which can lead to death or long-term disabilities. Rarely in the uterus, it occurs frequently during the transmission delivery. The greatest risk of transmission to the fetus and the newborn occurs in case of an initial maternal infection contracted in the second half of pregnancy. The risk of transmission of maternal-fetal-neonatal herpes simplex can be decreased by performing a treatment with antiviral drugs or resorting to a caesarean section in some specific cases. The purpose of this paper is to provide recommendations on management of herpes simplex infections in pregnancy and strategies to prevent transmission from mother to fetus.

PMID 22566740

Prolonged persistence of measles virus RNA is characteristic of primary infection dynamics

Proc Natl Acad Sci U S A. 2012 Sep 11;109(37):14989-94. Epub 2012 Aug 7.

Lin WH, Kouyos RD, Adams RJ, Grenfell BT, Griffin DE. Source W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205.

Abstract

Measles virus (MeV) is the poster child for acute infection followed by lifelong immunity. However, recent work shows the presence of MeV RNA in multiple sites for up to 3 mo after infection in a proportion of infected children. Here, we use experimental infection of rhesus macaques to show that prolonged RNA presence is characteristic of primary infection. We found that viral RNA persisted in the blood, respiratory tract, or lymph nodes four to five times longer than the infectious virus and that the clearance of MeV RNA from blood happened in three phases: rapid decline coincident with clearance of infectious virus, a rebound phase with increases up to 10-fold, and a phase of slow decrease to undetectable levels. To examine the effect of individual host immune factors on MeV load dynamics further, we developed a mathematical model that expressed viral replication and elimination in terms of the strength of MeV-specific T-cell responses, antibody responses, target cell limitations, and immunosuppressive activity of regulatory T cells. Based on the model, we demonstrate that viral dynamics, although initially regulated by T cells, require antibody to eliminate viral RNA. These results have profound consequences for our view of acute viral infections, the development of prolonged immunity, and, potentially, viral evolution.

PMID 22872860

Fetal varicella - diagnosis, management, and outcome

Prenat Diagn. 2012 Apr 18. doi: 10.1002/pd.3843. [Epub ahead of print]

Mandelbrot L. Source Hopital Louis Mourier, Service de Gynécologie-Obstétrique, Hôpitaux Universitaires Paris Nord Val de Seine, Assistance Publique-Hôpitaux de Paris, Université Paris-Diderot, 178 rue des Renouillers, 92701, Colombes cedex, France. laurent.mandelbrot@lmr.aphp.fr.

Abstract

Fetal varicella syndrome (FVS) is due to transplacental infection by the Varicella zoster virus following maternal infection. The risks for the fetus and neonate depend on the timing. When varicella occurs around delivery, it often leads to disseminated neonatal varicella. When varicella occurs during pregnancy, transmission can occur, but is usually asymptomatic; some infants develop zoster postnatally and a few have FVS. Before 20 weeks' gestation, FVS can occur, with an incidence of about 1%. The lesions can affect the skin, limbs, central and autonomous nervous systems, eyes, cause calcifications, and growth retardation; mortality is high. Lesions typically follow one or several nerve territories, suggesting that damage results from in utero zoster following primary fetal infection. There has been little study of prenatal diagnosis of FVS. Serial ultrasound examination can detect various anomalies, magnetic resonance imaging can be of use to investigate for microphthamia and cerebral lesions, and amniocentesis can diagnose viral transmission. Prevention strategies include vaccination and post-exposure prophylaxis with immune globulin and/or antivirals. Perspectives for treating infected fetuses in utero require further research. © 2012 John Wiley & Sons, Ltd. © 2012 John Wiley & Sons, Ltd.

PMID 22514124

Ebola GP-Specific Monoclonal Antibodies Protect Mice and Guinea Pigs from Lethal Ebola Virus Infection

PLoS Negl Trop Dis. 2012 Mar;6(3):e1575. Epub 2012 Mar 20.

Qiu X, Fernando L, Melito PL, Audet J, Feldmann H, Kobinger G, Alimonti JB, Jones SM. Source Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada.

Abstract

Ebola virus (EBOV) causes acute hemorrhagic fever in humans and non-human primates with mortality rates up to 90%. So far there are no effective treatments available. This study evaluates the protective efficacy of 8 monoclonal antibodies (MAbs) against Ebola glycoprotein in mice and guinea pigs. Immunocompetent mice or guinea pigs were given MAbs i.p. in various doses individually or as pools of 3-4 MAbs to test their protection against a lethal challenge with mouse- or guinea pig-adapted EBOV. Each of the 8 MAbs (100 µg) protected mice from a lethal EBOV challenge when administered 1 day before or after challenge. Seven MAbs were effective 2 days post-infection (dpi), with 1 MAb demonstrating partial protection 3 dpi. In the guinea pigs each MAb showed partial protection at 1 dpi, however the mean time to death was significantly prolonged compared to the control group. Moreover, treatment with pools of 3-4 MAbs completely protected the majority of animals, while administration at 2-3 dpi achieved 50-100% protection. This data suggests that the MAbs generated are capable of protecting both animal species against lethal Ebola virus challenge. These results indicate that MAbs particularly when used as an oligoclonal set are a potential therapeutic for post-exposure treatment of EBOV infection. PMID 22448295

2011

Perinatal outcomes after maternal 2009/H1N1 infection: national cohort study

BMJ. 2011 Jun 14;342:d3214. doi: 10.1136/bmj.d3214.

Pierce M, Kurinczuk JJ, Spark P, Brocklehurst P, Knight M; UKOSS. Source National Perinatal Epidemiology Unit, University of Oxford, Oxford OX3 7LF, UK. Abstract OBJECTIVES: To follow up a UK national cohort of women admitted to hospital with confirmed 2009/H1N1 influenza in pregnancy in order to obtain a complete picture of pregnancy outcomes and estimate the risks of adverse fetal and infant outcomes. DESIGN: National cohort study. SETTING: 221 hospitals with obstetrician led maternity units in the UK. PARTICIPANTS: 256 women admitted to hospital with confirmed 2009/H1N1 in pregnancy during the second wave of pandemic infection between September 2009 and January 2010; 1220 pregnant women for comparison. MAIN OUTCOME MEASURES: Rates of stillbirth, perinatal mortality, and neonatal mortality; odds ratios for infected versus comparison women. RESULTS: Perinatal mortality was higher in infants born to infected women (10 deaths among 256 infants; rate 39 (95% confidence interval 19 to 71) per 1000 total births) than in infants of uninfected women (9 deaths among 1233 infants; rate 7 (3 to 13) per 1000 total births) (P < 0.001). This was principally explained by an increase in the rate of stillbirth (27 per 1000 total births v 6 per 1000 total births; P = 0.001). Infants of infected women were also more likely to be born prematurely than were infants of comparison women (adjusted odds ratio 4.0, 95% confidence interval 2.7 to 5.9). Infected women who delivered preterm were more likely to be infected in their third trimester (P = 0.046), to have been admitted to an intensive care unit (P < 0.001), and to have a secondary pneumonia (P = 0.001) than were those who delivered at term. CONCLUSIONS: This study suggests an increase in the risk of poor outcomes of pregnancy in women infected with 2009/H1N1, which reinforces the message from studies of maternal risk alone. The health of pregnant women is an important public health priority in future waves of this and other influenza pandemics. Comment in Evid Based Nurs. 2012 Jan;15(1):11-2. BMJ. 2011;342:d3237.

PMID 21672992

ViralZone: a knowledge resource to understand virus diversity

Nucleic Acids Res. 2011 Jan;39(Database issue):D576-82. Epub 2010 Oct 14.

Hulo C, de Castro E, Masson P, Bougueleret L, Bairoch A, Xenarios I, Le Mercier P.Source Swiss-Prot group, Swiss Institute of Bioinformatics, Centre Médical Universitaire, CH-1211 Geneva 4, Switzerland.

Abstract

The molecular diversity of viruses complicates the interpretation of viral genomic and proteomic data. To make sense of viral gene functions, investigators must be familiar with the virus host range, replication cycle and virion structure. Our aim is to provide a comprehensive resource bridging together textbook knowledge with genomic and proteomic sequences. ViralZone web resource (www.expasy.org/viralzone/) provides fact sheets on all known virus families/genera with easy access to sequence data. A selection of reference strains (RefStrain) provides annotated standards to circumvent the exponential increase of virus sequences. Moreover ViralZone offers a complete set of detailed and accurate virion pictures.

PMID 20947564

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3013774

2010

Human Papillomavirus (HPV)

• eight HPV types 16, 18, 45, 33, 31, 52, 58, and 35 in descending order of frequency responsible for more than 90 percent of cervical cancer cases. (Lancet 2010)
• 118 different HPV types identified
  • about 40 infect the genital tract
  • 12 are known to be cancer-causing
• vaccine Cervarix (GSK) and Gardasil (Merck) protect against HPV types 16 and 18, and, through cross-protection, partially also against HPV types 31 and 45.

2008

In vitro and in vivo human herpesvirus 8 infection of placenta

PLoS One. 2008;3(12):e4073. Epub 2008 Dec 30.

Di Stefano M, Calabrò ML, Di Gangi IM, Cantatore S, Barbierato M, Bergamo E, Kfutwah AJ, Neri M, Chieco-Bianchi L, Greco P, Gesualdo L, Ayouba A, Menu E, Fiore JR. Source Laboratory of Molecular Medicine, University of Foggia, Foggia, Italy. Abstract Herpesvirus infection of placenta may be harmful in pregnancy leading to disorders in fetal growth, premature delivery, miscarriage, or major congenital abnormalities. Although a correlation between human herpesvirus 8 (HHV-8) infection and abortion or low birth weight in children has been suggested, and rare cases of in utero or perinatal HHV-8 transmission have been documented, no direct evidence of HHV-8 infection of placenta has yet been reported. The aim of this study was to evaluate the in vitro and in vivo susceptibility of placental cells to HHV-8 infection. Short-term infection assays were performed on placental chorionic villi isolated from term placentae. Qualitative and quantitative HHV-8 detection were performed by PCR and real-time PCR, and HHV-8 proteins were analyzed by immunohistochemistry. Term placenta samples from HHV-8-seropositive women were analyzed for the presence of HHV-8 DNA and antigens. In vitro infected histocultures showed increasing amounts of HHV-8 DNA in tissues and supernatants; cyto- and syncitiotrophoblasts, as well as endothelial cells, expressed latent and lytic viral antigens. Increased apoptotic phenomena were visualized by the terminal deoxynucleotidyl transferase-mediated deoxyuridine nick end-labeling method in infected histocultures. Ex vivo, HHV-8 DNA and a latent viral antigen were detected in placenta samples from HHV-8-seropositive women. These findings demonstrate that HHV-8, like other human herpesviruses, may infect placental cells in vitro and in vivo, thus providing evidence that this phenomenon might influence vertical transmission and pregnancy outcome in HHV-8-infected women.

PMID 19115001

SEALS Factsheet

http://www.rcpaqap.com.au/serology/factsheets/fludetection.pdf

• Adenovirus - presence in the respiratory tract is often not accompanied by symptoms. The virus may be shed over long periods of time, so the association between isolation and clinical symptoms is not definitive. However it can cause severe respiratory illness, especially as local outbreaks.
• Coronavirus - Nasal discharge and malaise are typical, while a cough and sore throat are generally not prominent and there is no fever. The illness lasts about a week and is usually of no real consequence. Coronaviruses are difficult to grow in cultured cells and are therefore rarely recovered from specimens.
• Influenza virus - cause highly contagious respiratory disease, which typically result in yearly winter epidemics. Types A and B cause the same spectrum of disease although type A infections result in hospitalisation more often than type B does.
• Parainfluenza viruses - there are four parainfluenza virus types, only types 1, 2 and 3 are readily detected. All three viruses have distinct seasonal epidemiological patterns. Generally types 1 and 2 have an autumn epidemic peak while type 3 is endemic occurring sporadically throughout the year. Parainfluenza viruses are the most common cause of viral croup.
• Respiratory Syncytial Virus (RSV) - infection is the principal cause of bronchiolitis and pneumonia in infants. In adults it usually causes "common cold" like symptoms and the elderly are prone to pneumonia. RSV epidemics occur in the winter months and sporadically at other times. Infection usually lasts between 7-14 days.
• Rhinovirus - responsible for one third to one half of the "common colds" people suffer every year. There are a large number of serotypes, so vaccines do not prevent against infection. Laboratory confirmation can be difficult, and is generally not feasible. Infection usually remains localised to the upper respiratory tract and symptom resolution generally occurs within a week.

CDC Images

http://phil.cdc.gov/phil_images/20030425/14/PHIL_3646_lores.jpg

Histopathology of cytomegalovirus infection of brain

http://phil.cdc.gov/PHIL_Images/06011999/00021/09G0041_lores.jpg

ID#:1160 Description: Histopathology of cytomegalovirus infection of brain.

Histopathology of cytomegalovirus infection of brain capillary endothelial cell.

High Resolution: High resolution download is not available for this image

Content Providers(s):CDC/ Dr. HarasztiCreation Date:1964

Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.

Cytomegalovirus infection of cell in urine

http://phil.cdc.gov/PHIL_Images/06011999/00018/09G0038_lores.jpg

High Resolution: High resolution download is not available for this image

Content Providers(s):CDC/ Dr. HarasztiCreation Date:1964

Histopathology of cytomegalovirus infection of kidney

http://phil.cdc.gov/PHIL_Images/06011999/00016/09G0036_lores.jpg

Description: Histopathology of cytomegalovirus infection of kidney.

High Resolution:High resolution download is not available for this image

Content Providers(s):CDC/ Dr. Haraszti

Creation Date:1964

Active cytomegalovirus infection of lung in AIDS

http://phil.cdc.gov/PHIL_Images/958/958_lores.jpg

Description:Active cytomegalovirus infection of lung in AIDS. Histopathology of lung shows cytomegalic pneumocyte containing characteristic intranuclear inclusion. High Resolution:Right click here and select "Save Target As..." for hi-resolution image (6.52 MB)Content Providers(s):CDC/ Dr. Edwin P. Ewing, Jr.Creation Date:1982Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.

Measles and Germal Measles (Rubella)

German Measles

• get a blotchy red rash which comes and goes and usually disappears altogether after 2 days.
• sometimes suffer with a light cold prior to the rash appearing.
• dangerous for pregnant women who have no immunity to the virus.
• infection period is usually a week before the rash until a week after it has disappeared.

Measles

• a mild upper respitatory affect.
• get a rash of spots, very high temperature which can last up to 4 days, cough, severe conjunctivitis and possibly encephalitis.
• incubation period is 4 to 12 days
• can remain infectious for 3 to 5 weeks after rash

Measles structure - http://www.plospathogens.org/article/info%3Adoi%2F10.1371%2Fjournal.ppat.1002058

MMR Vaccine - http://www.merck.com/product/usa/pi_circulars/m/mmr_ii/mmr_ii_pi.pdf

Surveillance Guidelines for Measles, Rubella and Congenital Rubella Syndrome in theWHO European Region - http://www.euro.who.int/__data/assets/pdf_file/0018/79020/E93035.pdf