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Seropositivity Rate (seropositivity + rate)

Distribution by Scientific Domains

Medical Sciences	100%

Selected Abstracts

Human papillomavirus infection and primary fallopian tube carcinoma: a seroepidemiological study

BJOG : AN INTERNATIONAL JOURNAL OF OBSTETRICS & GYNAECOLOGY, Issue 4 2007
A Riska
Objective, To evaluate the role of human papillomavirus (HPV) types 6, 11, 16, 18, 31 or 33 infection in primary fallopian tube carcinoma (PFTC). Design, A retrospective case,control study. Setting, Department of Obstetrics and Gynaecology, Helsinki University Hospital, Finland. Population, Seventy-eight consecutive women with PFTC diagnosed between 1985 and 2000 were studied. For each case, two healthy controls were selected. Methods, Serum immunoglobulin G antibodies to HPV types 6, 11, 16, 18, 31 and 33 were measured from women with PFTC and their healthy controls. Main outcome measures, Analysis of HPV 6, 11, 18, 31 and 33 seropositivity among women with PFTC and controls. Results, Seropositivity rates of non-oncogenic or oncogenic HPV types did not differ between cases and controls, odds ratios being 1.04,1.30 for oncogenic HPVs and 1.08,1.19 for non-oncogenic HPVs, similarly. We did not find any multiplicative joint effect in PFTC by antibodies to more than one oncogenic HPV type; neither did we find any antagonistic effect among women with antibodies to non-oncogenic and oncogenic HPV types. Conclusions, Our results do not suggest any link between PFTC and serological evidence for HPV infection. [source]

Classic type of Kaposi's sarcoma and human herpesvirus 8 infection in Xinjiang, China

PATHOLOGY INTERNATIONAL, Issue 11 2001
Payzula Dilnur
We report 17 cases of the classic type of Kaposi's sarcoma in Xinjiang, which is located in the north-western area of China surrounded by Mongolia in the east, Russia in the north and Kazakhstan in the west. Fifteen of the patients were of the Uygur people. All patients were male and did not have acquired immunodeficiency syndrome. Most of the lesions were found in the lower and/or upper extremities, with 16 patients showing multiple lesions. Immunohistochemical examination of the lesions revealed that human herpesvirus 8 (HHV-8)-encoded latency-associated nuclear antigen was expressed in the nuclei of spindle-shaped tumor cells. HHV-8 DNA was detected by polymerase chain reaction in all seven cases examined. Phylogenetic tree analysis revealed that DNA sequences of the HHV-8-encoded K1 gene in the seven Kaposi's sarcoma cases were classified as subtype C that was common in the Mediterranean, the Middle East and East Asian countries. In addition, using immunofluorescence we investigated the seroprevalence of HHV-8 in 73 Uygur patients with diseases other than Kaposi's sarcoma. Surprisingly, the serological study revealed that 34 of the patients (46.6%) were positive for antibodies against HHV-8, suggesting that HHV-8 infection is widespread in Xinjiang area. The occurrence of the classic type of Kaposi's sarcoma with a high seropositivity rate implies that Xinjiang is the most endemic area for HHV-8 infection in the world known to date. Considering that Xinjiang is located at the middle point of the Silk Road that used to extend from Rome to China, these data imply that the virus may have been in circulation in this area due to the migration of the people via the Silk Road. [source]

Cytomegalovirus transmission to extremely low-birthweight infants through breast milk

ACTA PAEDIATRICA, Issue 1 2005
S. Doctor
Abstract Aim: To determine the incidence, timing and clinical significance of acquired postnatal cytomegalovirus (CMV) in extremely low-birthweight (ELBW) infants. Methods: Prospective, longitudinal surveillance study. ELBW infants were recruited in the first week of life. Maternal blood was tested for CMV-specific IgG antibodies. Weekly urine samples were obtained from infants for CMV culture and rapid antigen testing. Data were collected regarding clinical course and breast milk intake. Results: Of 181 eligible infants, 119 infants, born to 101 mothers, were enrolled. Eighty of the 101 mothers had their serum checked for CMV status. Seventy percent of those tested were seropositive for CMV. Of the 65 infants born to seropositive mothers, 94% received breast milk during their hospital stay. Complete urine collection was obtained in 92 infants. CMV was cultured from the urine of only four infants, all of whom were born to seropositive mothers. Only one of these four infants was symptomatic. The range at which CMV was first detected was between 48 and 72 postnatal days of age. Conclusions: Despite a very high CMV seropositivity rate in mothers of ELBW infants, and the previously reported high rate of CMV excretion into breast milk, the incidence of postnatal CMV transmission was extremely low in our study. [source]

A lower than expected adult Victorian community attack rate for pandemic (H1N1) 2009

AUSTRALIAN AND NEW ZEALAND JOURNAL OF PUBLIC HEALTH, Issue 3 2010
Nathan Grills
Abstract Objectives: To determine the community seropositivity of pandemic (H1N1) 2009 influenza in order to estimate immunity and the community attack rate. Methods: Selected clusters of participants (n=706) in the ,Victorian Health Monitor' (VHM), from whom blood samples were taken between August and October 2009, were tested opportunistically for antibodies to pandemic (H1N1) 2009 influenza virus. A titre of ,1:40 was chosen as the cut-off for recording seropositivity. The proportion (95% CI) of seropositive participants, aged 18 to <65 years of age, were computed for groups of census collection districts (CDs) across metropolitan Melbourne. Results: The observed pandemic (H1N1) 2009 seropositivity rates for all CDs tested in metropolitan Melbourne was 16.0% (95% CI:12.9-19.1%); in northern Melbourne subset was 14.4% (95% CI:12.4-16.3%); and in eastern subset was 16.2% (95% CI:9.7-22.6%). The pre-pandemic (H1N1) 2009 positivity rate was estimated at 6%. Conclusion: Given this study's estimate of 16.0% seropositivity in adults in metropolitan Melbourne, and given the WHO laboratory's estimate of 6% pre-pandemic positivity, the estimated adult community attack rate was 10% for metropolitan Melbourne. Implications: This community attack rate is lower than anticipated and suggests that levels of immunity to Pandemic (H1N1) 2009 might be lower than anticipated. Although limited by a low response rate of 34%, this study suggests low adult seropositivity, which may be useful for public health professionals when encouraging the community to get vaccinated. [source]