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Browsing Research Articles (Medical Virology) by Author "Variava, Ebrahim"
Now showing items 1-19 of 19
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Tempia, Stefano; Walaza, Sibongile; Moyes, Jocelyn; Cohen, Adam L.; Von Mollendorf, Claire; McMorrow, Meredith L.; Treurnicht, Florette K.; Venter, Marietjie; Pretorius, Marthi Andréa; Hellferscee, Orienka; Wolter, Nicole; Von Gottberg, Anne; Nguweneza, Athermon; McAnerney, Johanna M.; Dawood, Halima; Variava, Ebrahim; Madhi, Shabir A.; Cohen, Cheryl (Centers for Disease Control and Prevention, 2017-07)The attributable fraction (AF) of influenza virus detection to illness has not been described for patients in different age groups or with different HIV infection statuses. We compared the age group–specific prevalence of ...
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Murray, Jillian; Cohen, Adam L.; Walaza, Sibongile; Groome, Michelle; Madho, Shabir A.; Variava, Ebrahim; Kahn, Kathleen; Dawood, Halima; Tempia, Stefano; Tshangela, Akhona; Venter, Marietjie; Feikin, Daniel R.; Cohen, Cheryl; Chowell, Gerardo (Public Library of Science, 2015-07-08)Local disease burden data are necessary to set national influenza vaccination policy. In 2010 the population of South Africa was 50 million and the HIV prevalence was 11%. We used a previously developed methodology to ...
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Millman, Alexander J.; Greenbaum, Adena; Walaza, Sibongile; Cohen, Adam L.; Groome, Michelle J.; Reed, Carrie; McMorrow, Meredith; Tempia, Stefano; Venter, Marietjie; Treurnicht, Florette K.; Madhi, Shabir A.; Cohen, Cheryl; Variava, Ebrahim (BioMed Central, 2017-02-02)BACKGROUND : Acute lower respiratory tract infections (LRTI) are a frequent cause of hospitalization and mortality in South Africa; however, existing respiratory severity scores may underestimate mortality risk in ...
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Tempia, Stefano; Walaza, Sibongile; Moyes, Jocelyn; Cohen, Adam L.; Von Mollendorf, Claire; McMorrow, Meredith L.; Mhlanga, Sarona; Treurnicht, Florette K.; Venter, Marietjie; Pretorius, Marthi A.; Hellferscee, Orienka; Wolter, Nicole; Von Gottberg, Anne; Nguweneza, Arthemon; McAnerney, Johanna M.; Dawood, Halima; Variava, Ebrahim; Madhi, Shabir A.; Cohen, Cheryl (Wiley Open Access, 2018-05)BACKGROUND : The attributable fraction of influenza virus detection to illness (INF-AF) and the duration of symptoms as a surveillance inclusion criterion could potentially have substantial effects on influenza disease ...
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Hellferscee, Orienka; Treurnicht, Florette K.; Tempia, Stefano; Variava, Ebrahim; Dawood, Halima; Kahn, Kathleen; Cohen, Adam L.; Pretorius, Marthi Andréa; Cohen, Cheryl; Madhi, Shabir A.; Venter, Marietjie (Wiley Open Access, 2017-04)BACKGROUND : Human enteroviruses (EV) have been associated with severe acute respiratory illness (SARI) in South Africa. OBJECTIVES : We aimed to describe the molecular epidemiology of EV serotypes among patients ...
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Cohen, Adam L.; Hellferscee, Orienka; Pretorius, Marthi Andréa; Treurnicht, Florette K.; Walaza, Sibongile; Madhi, Shabir A.; Groome, Michelle; Dawood, Halima; Variava, Ebrahim; Kahn, Kathleen; Wolter, Nicole; Von Gottberg, Anne; Tempia, Stefano; Venter, Marietjie; Cohen, Cheryl (Coordinating Center for Infectious Diseases, Centers for Disease Control and Prevention, 2014-07)To determine clinical and epidemiologic differences between influenza caused by different virus types and subtypes, we identified patients and tested specimens. Patients were children and adults hospitalized with confirmed ...
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Cohen, Cheryl; Walaza, Sibongile; Moyes, Jocelyn; Groome, Michelle; Tempia, Stefano; Pretorius, Marthi Andréa; Hellferscee, Orienka; Dawood, Halima; Haffejee, Summaya; Variava, Ebrahim; Kahn, Kathleen; Tshangela, Akhona; Von Gottberg, Anne; Wolter, Nicole; Cohen, Adam L.; Kgokong, Babatyi; Venter, Marietjie; Madhi, Shabir A. (Public Library of Science, 2015-02-23)OBJECTIVE There are few published studies describing severe acute respiratory illness (SARI) epidemiology amongst older children and adults from high HIV-prevalence settings. We aimed to describe SARI epidemiology amongst ...
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Cohen, Cheryl; Walaza, Sibongile; Moyes, Jocelyn; Groome, Michelle; Tempia, Stefano; Pretorius, Marthi Andréa; Hellferscee, Orienka; Dawood, Halima; Chhagan, Meera; Naby, Fathima; Haffejee, Summaya; Variava, Ebrahim; Kahn, Kathleen; Nzenze, Susan; Tshangela, Akhona; Von Gottberg, Anne; Wolter, Nicole; Cohen, Adam L.; Kgokong, Babatyi; Venter, Marietjie; Madhi, Shabir A. (Lippincott Williams and Wilkins, 2015-01)BACKGROUND : Data on the epidemiology of viral-associated acute lower respiratory tract infection (LRTI) from high HIV prevalence settings are limited. We aimed to describe LRTI hospitalizations among South African children ...
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Hellferscee, Orienka; Treurnicht, Florette K.; Walaza, Sibongile; Du Plessis, Mignon; Von Gottberg, Anne; Wolter, Nicole; Moyes, Jocelyn; Dawood, Halima; Variava, Ebrahim; Pretorius, Marthi Andréa; Venter, Marietjie; Cohen, Cheryl; Tempia, Stefano (Oxford University Press, 2019-06)BACKGROUND : The association of rhinovirus (RV) detection to illness is poorly understood. METHODS : We enrolled case patients hospitalized with severe respiratory illness (SRI) at 2 hospitals and outpatients with ...
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Pretorius, Marthi Andréa; Tempia, Stefano; Treurnicht, Florette K.; Walaza, Sibongile; Cohen, Adam L.; Moyes, Jocelyn; Hellferscee, Orienka; Variava, Ebrahim; Dawood, Halima; Chhagan, Meera; Haffejee, Summaya; Madhi, Shabir A.; Cohen, Cheryl; Venter, Marietjie (Wiley, 2014-07-03)BACKGROUND Rhinoviruses (RV) are a well-established cause of respiratory illness. RV-C has been associated with more severe illness. We aimed to characterize and compare the clinical presentations and disease severity ...
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Wolter, Nicole; Cohen, Cheryl; Tempia, Stefano; Madhi, Shabir A.; Venter, Marietjie; Moyes, Jocelyn; Walaza, Sibongile; Kgokong, Babatyi; Groome, Michelle; Du Plessis, Mignon; Pretorius, Marthi Andréa; Dawood, Halima; Kahn, Kathleen; Variava, Ebrahim; Klugman, Keith P.; Von Gottberg, Anne (Oxford University Press, 2014-01)BACKGROUND : Increased pneumococcal loads are associated with severe outcomes. We determined the prevalence of pneumococcal DNA in blood specimens from patients hospitalized with acute lower respiratory tract infection and ...
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Valley Omar, Ziyaad; Tempia, Stefano; Hellferscee, Orienka; Walaza, sibongile; Variava, Ebrahim; Dawood, Halima; Kahn, Kathleen; Meredith, McMorrow; Pretorius, Marthi; Mtshali, Senzo; Mamorobela, Ernest; Wolter, Nicole; Venter, Marietjie; Von Gottenberg, Anne; Cohen, Cheryl; Treurnicht, Florette K. (Wiley, 2022-03)BACKGROUND: We aimed to describe the prevalence of human respiratory syncytial virus (HRSV) and evaluate associations between HRSV subgroups and/or genotypes and epidemiologic characteristics and clinical outcomes in ...
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Walaza, Sibongile; Tempia, Stefano; Dawood, Halima; Variava, Ebrahim; Wolter, Nicole; Dreyer, Andries; Moyes, Jocelyn; Von Mollendorf, Claire; McMorrow, Meredith; Von Gottberg, Anne; Haffejee, Sumayya; Venter, Marietjie; Treurnicht, Florette K.; Hellferscee, Orienka; Martinson, Neil A.; Ismail, Nazir Ahmed; Cohen, Cheryl (Oxford University Press, 2019-03)BACKGROUND: Data on the prevalence and impact of influenza–tuberculosis coinfection on clinical outcomes from high–HIV and –tuberculosis burden settings are limited. We explored the impact of influenza and tuberculosis ...
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Von Mollendorf, Claire; Hellferscee, Orienka; Valley-Omar, Ziyaad; Treurnicht, Florette K.; Walaza, Sibongile; Martinson, Neil A.; Lebina, Limakatso; Mothlaoleng, Katlego; Mahlase, Gethwana; Variava, Ebrahim; Cohen, Adam L.; Venter, Marietjie; Cohen, Cheryl; Tembo, Stefano (Oxford University Press, 2018-10)BACKGROUND : Prolonged shedding of influenza viruses may be associated with increased transmissibility and resistance mutation acquisition due to therapy. We compared duration and magnitude of influenza shedding between ...
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Walaza, Sibongile; Tempia, Stefano; Dawood, Halima; Variava, Ebrahim; Moyes, Jocelyn; Cohen, Adam L.; Wolter, Nicole; Groome, Michelle; Von Mollendorf, Claire; Kahn, Kathleen; Pretorius, Marthi Andréa; Venter, Marietjie; Madhi, Shabir A.; Cohen, Cheryl (BioMed Central, 2015-01)BACKGROUND : Data on the association between influenza and tuberculosis are limited. We describe the characteristics of patients with laboratory-confirmed tuberculosis, laboratory-confirmed influenza and tuberculosis-influenza ...
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Shah, Maunank; Martinson, Neil A.; Chaisson, Richard E.; Martin, Desmond J.; Variava, Ebrahim; Dorman, Susan E. (American Society for Microbiology, 2010-08)Urinary lipoarabinomannan (LAM) detection is a promising approach for rapid diagnosis of active tuberculosis (TB). In microbiologically confirmed TB patients, quantitative LAM detection results increased progressively with ...
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Tempia, Stefano; Walaza, Sibongile; Moyes, Jocelyn; Cohen, Adam L.; Von Mollendorf, Claire; Treurnicht, Florette K.; Venter, Marietjie; Pretorius, Marthi Andréa; Hellferscee, Orienka; Mtshali, Senzo; Seleka, Mpho; Tshangela, Akhona; Nguweneza, Athermon; McAnerney, Johanna M.; Wolter, Nicole; Von Gottberg, Anne; Dawood, Halima; Variava, Ebrahim; Madhi, Shabir A.; Cohen, Cheryl (Oxford University Press, 2017)BACKGROUND : Data on risk factors for influenza-associated hospitalizations in low- and middle-income countries are limited. METHODS : We conducted active syndromic surveillance for hospitalized severe acute respiratory ...
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Pretorius, Marthi A.; Tempia, Stefano; Treurnicht, Florette K.; Hellferscee, Orienka; Seleka, Mpho; Walaza, Sibongile; Cohen, Adam L.; Moyes, Jocelyn; Variava, Ebrahim; Dawood, Halima; Cohen, Cheryl; Venter, Marietjie (Elsevier, 2016-02)BACKGROUND : Viruses detected in patients with acute respiratory infections may be the cause of illness or colonizers. METHODS : We compared the prevalence of 10 common respiratory viruses (influenza A and B viruses, ...
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Cohen, Cheryl; Moyes, Jocelyn; Tempia, Stefano; Groome, Michelle; Walaza, Sibongile; Pretorius, Marthi Andréa; Dawood, Halima; Chhagan, Meera; Haffejee, Summaya; Variava, Ebrahim; Kahn, Kathleen; Tshangela, Akhona; Von Gottberg, Anne; Wolter, Nicole; Cohen, Adam L.; Kgokong, Babatyi; Venter, Marietjie; Madhi, Shabir A. (Coordinating Center for Infectious Diseases, Centers for Disease Control and Prevention, 2013-11)Data on influenza epidemiology in HIV-infected persons are limited, particularly for sub-Saharan Africa, where HIV infection is widespread. We tested respiratory and blood samples from patients with acute lower respiratory ...
Now showing items 1-19 of 19