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GERMS, Volume 5, Issue 4 (12 2015) – 4 articles , Pages 115-140

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Article
Identification of Occult Hepatitis B Virus (HBV) Infection and Viral Antigens in Healthcare Workers Who Presented Low to Moderate Levels of Anti-HBs After HBV Vaccination
by Zohreh Borzooy, Seyed Mohammad Jazayeri, Abbass Mirshafiey, Azam Khamseh, Masoud Karkhaneh Mahmoudie, Pedram Azimzadeh, Babak Geravand, Mohammad Ali Boroumand, Mina Afshar, Vahdat Poortahmasebi, Mostafa Hosseini and Adrian Streinu-Cercel
GERMS 2015, 5(4), 134-140; https://doi.org/10.11599/germs.2015.1081 - 2 Dec 2015
Cited by 8
Abstract
Background: Worldwide, healthcare workers (HCWs) show different levels of response to hepatitis B virus (HBV) vaccine. One of the factors associated with vaccine unresponsiveness may be the existence of current or past HBV infection. Regardless of the presence of HBsAg (overt infection), occult [...] Read more.
Background: Worldwide, healthcare workers (HCWs) show different levels of response to hepatitis B virus (HBV) vaccine. One of the factors associated with vaccine unresponsiveness may be the existence of current or past HBV infection. Regardless of the presence of HBsAg (overt infection), occult HBV infection (OBI, defined as presence of HBV DNA in the absence of HBsAg) might also account for some non- or hypo-response cases. Methods: Sera from 120 HBsAg-negative HCWs with low and moderate levels of anti-HBs, <10 IU/mL (group I) and <100 IU/mL (group II) respectively, were selected and were examined for OBI by sensitive real-time PCR regardless of HBV serological profiles. Direct sequencing on surface genes was carried out in OBI-positive cases. Results: Four (3.3%) were positive for OBI. All were negative for anti-HBc. Two of the positive cases had moderate levels of anti-HBs (>10 to <100 IU/mL). No significant differences were found between the two groups in terms of risk factors or serological data. No mutations were found in surface proteins of OBI cases. Conclusion: OBI in these subjects might be due to other factors rather than presence of “a” determinant mutations. Healthcare workers with inadequate to moderate levels of anti-HBs (<100 IU/mL) following vaccination, regardless of their serological profile for HBV, should be tested for the presence of HBV DNA by sensitive molecular tests. Anti-HBc is not a reliable marker for suspicion of OBI, especially in high-risk group individuals. Full article
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Article
Antigenic Distribution of Streptococcus agalactiae Isolates from Pregnant Women at Garankuwa Hospital—South Africa
by Martina O Chukwu, Rooyen Tinago Mavenyengwa, Charles M Monyama, John Y Bolukaoto, Sogolo L Lebelo, Motlatji RB Maloba, Maphoshane Nchabeleng and Sylvester Rogers Moyo
GERMS 2015, 5(4), 125-133; https://doi.org/10.11599/germs.2015.1080 - 2 Dec 2015
Cited by 9
Abstract
Introduction: Streptococcus agalactiae (group B streptococcus; GBS) is globally recognised as one of the leading causes of neonatal sepsis and meningitis. It also causes adverse pregnancy outcomes such as stillbirth and miscarriages. Incidence of invasive disease is increasing in non‐pregnant adults with underlying [...] Read more.
Introduction: Streptococcus agalactiae (group B streptococcus; GBS) is globally recognised as one of the leading causes of neonatal sepsis and meningitis. It also causes adverse pregnancy outcomes such as stillbirth and miscarriages. Incidence of invasive disease is increasing in non‐pregnant adults with underlying medical conditions (e.g., diabetes mellitus). Epidemiological studies of GBS infections are based on capsular serotyping. Genotyping of the surface anchored protein genes is also becoming an important tool for GBS studies. Currently ten different GBS serotypes have been identified. This study was performed to determine the prevalence of GBS capsular types (CTs) and surface anchored protein genes in isolates from colonized pregnant women attending antenatal clinic, at Dr George Mukhari Academic Hospital, Garankuwa, Pretoria, South Africa. Methods: The samples were collected over 11 months and cultured on selective media. GBS was identified using different morphological and biochemical tests. Capsular typing was done using latex agglutination test and conventional PCR. Multiplex PCR with specific primers was used to detect the surface anchored protein genes. Results: Of the 413 pregnant women recruited, 128 (30.9%) were colonized with GBS. The capsular polysaccharide (CPS) typing test showed that CPS type III (29.7%) was the most prevalent capsular type followed by CPS type Ia (25.8%), II (15.6%), IV (8.6%), V (10.9%) and Ib (8.6%); 0.7% of the isolates were nontypeable. Multiplex PCR revealed that the surface proteins genes were possessed by all the capsular types: rib (44.5%), bca (24.7%), alp2/3 (17.9%), epsilon (8.6%) and alp4 (4.7%). Conclusion: The common capsular types found in this study are Ia, III, and II. The most common protein genes identified were rib and bca, and the distribution of the surface protein genes among the isolates of different capsular types showed similar trends to the distribution reported from previous studies. Full article
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Article
Birth Outcome in HIV Vertically Exposed Children in Two Romanian Centers
by Ana Maria Tudor, Mariana Mărdărescu, Cristina Petre, Ruxandra Neagu Drăghicenoiu, Rodica Ungurianu, Cătălin Tilișcan, Dan Oțelea, Simona Claudia Cambrea, Doina Eugenia Tănase, Ana Maria Schweitzer and Simona Ruță
GERMS 2015, 5(4), 116-124; https://doi.org/10.11599/germs.2015.1079 - 2 Dec 2015
Cited by 5
Abstract
Background: The Romanian HIV epidemic is characterized by a high prevalence among children born in the late ’80s, perinatally infected. The impact of long‐term treatment on their offspring is unknown. We evaluated the influence of prenatal care on the rate of premature birth [...] Read more.
Background: The Romanian HIV epidemic is characterized by a high prevalence among children born in the late ’80s, perinatally infected. The impact of long‐term treatment on their offspring is unknown. We evaluated the influence of prenatal care on the rate of premature birth among the HIV‐exposed children of heavily treated HIV‐infected mothers in two Romanian centers. Methods: We retrospectively analyzed data on all patients born by HIV‐infected mothers between 2006 and 2012 followed up in two main regional centers. We compared the rate of premature birth and the differences between the sites regarding children and maternal demographic characteristics and antiretroviral exposure in pregnant women. Results: A total of 358 children born to 315 women were enrolled between 2006‐2012, 262 children from the National Institute for Infectious Diseases “Prof. Dr. Matei Balş” Bucharest (NIID) and 96 children from the Clinical Infectious Diseases Hospital Constanţa (IDHC). Gender rate in newborns and mean age in mothers were similar. We recorded statistically significant differences between centers in the rate of HIV vertical transmission (16.8% vs. 6.2%, p = 0.002) and prematurity (25.2 vs. 14.6%, p = 0.023). The most used antiretroviral combination during pregnancy in IDHC was boosted lopinavir and fixed dose zidovudine‐lamivudine (66% of cases), while in NIID a greater diversity of antiretrovirals were used. Women from IDHC were more frequently treated during pregnancy (83.3% vs. 68.6%, p = 0.004). HCV coinfection and illegal drug use were associated with prematurity in the NIID cohort (p = 0.037, p = 0.024). Conclusion: We found a higher rate of premature birth and HIV infection in NIID. In IDHC we found a higher rate of low birth weight in children and a higher rate of heavily treated women. Prematurity was associated with hepatitis C infection and illegal drug use in the NIID cohort. Full article
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Editorial
Biomarker Panels and Regression of Fibrosis in Chronic Viral Hepatitis
by Mona Munteanu
GERMS 2015, 5(4), 115; https://doi.org/10.11599/germs.2015.1078 - 2 Dec 2015
Abstract
Thanks to non-invasive blood diagnosis panels of liver lesions such as FibroMax and liver elastography (transient and real-time), the entire perception of the disease has been transformed in such a way that the patient will get within 20 minutes the exact status of [...] Read more.
Thanks to non-invasive blood diagnosis panels of liver lesions such as FibroMax and liver elastography (transient and real-time), the entire perception of the disease has been transformed in such a way that the patient will get within 20 minutes the exact status of the illness, prognostic informationand predictability of treatment response [...] Full article
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