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Interferon-gamma release assays for the detection of Mycobacterium tuberculosis infection in children with cancer

Stefan D.C.; Dippenaar A.; Detjen A.K.; Schaaf H.S.; Marais B.J.; Kriel B.; Loebenberg L.; Walzl G.; Hesseling A.C. (2010)

SETTING: The paediatric oncology unit at Tygerberg Children's Hospital, South Africa. OBJECTIVES: To assess the use of the tuberculin skin test (TST) and two commercial interferon-gamma release assays (IGRAs) for the ...

Tuberculosis exposure in HIV-exposed infants in a high-prevalence setting

Cotton M.F.; Schaaf H.S.; Lottering G.; Weber H.L.; Coetzee J.; Nachman S. (2008)

Exposure to TB was quantified by screening human immunodeficiency virus (HIV) exposed infants aged 3-4 months for an isoniazid prophylaxis study where tuberculosis (TB) exposure excluded enrolment. Seventy-seven (10.1%, ...

A prospective evaluation of children under the age of 5 years living in the same household as adults with recently diagnosed pulmonary tuberculosis

Beyers N.; Gie R.P.; Schaaf H.S.; Van Zyl S.; Talent J.M.; Nel E.D.; Donald P.R. (1997)

SETTING: A South African suburb with a high tuberculosis incidence (>800/100 000). OBJECTIVE: To determine the prevalence of tuberculosis infection and disease in children less than 5 years of age who were in close household ...

Pyridoxal-5-phosphate plasma concentrations in children receiving tuberculosis chemotherapy including isoniazid

Cilliers K.; Labadarios D.; Schaaf H.S.; Willemse M.; Maritz J.S.; Werely C.J.; Hussey G.; Donald P.R. (2010)

Aim: Little is known about pyridoxine nutriture of children treated with isoniazid (INH) regimens. This study documents plasma pyridoxal 5′-phosphate (PLP) concentrations in children, HIV-infected and HIV-uninfected, ...

Childhood drug-resistant tuberculosis in the Western Cape Province of South Africa

Schaaf H.S.; Marais B.J.; Hesseling A.C.; Gie R.P.; Beyers N.; Donald P.R. (2006)

Aim: Continued surveillance of drug resistance amongst children presenting with culture-confirmed tuberculosis to a tertiary care hospital and to community clinics. Methods: Drug susceptibility testing for isoniazid and ...

Papulonecrotic tuberculid in children: A report of eight patients

Jordaan H.F.; Schneider J.W.; Schaaf H.S.; Victor T.S.; Geiger D.H.; Van Helden P.D.; Rossouw D.J. (1996)

Papulonecrotic tuberculid (PNT), a form of cutaneous tuberculosis (TB), is uncommon in children. We identified eight children (six girls and two boys) with PNT. Their ages ranged from 19 to 139 months (median: 47.5 months, ...

Tuberculosis in oncology patients

Stefan D.C.; Kruis A.L.; Schaaf H.S.; Wessels G. (2008)

Background: There is a dearth of studies addressing the incidence and clinical presentation of tuberculosis (TB) in children with cancer. Aim: To evaluate the incidence of TB in paediatric oncology patients at Tygerberg ...

A critical look at the diagnostic value of culture-confirmation in childhood tuberculosis

Engelbrecht A.L.; Marais B.J.; Donald P.R.; Schaaf H.S. (2006)

Objectives: To describe the clinical presentation, delay in diagnosis and treatment initiation, and outcome of culture-confirmed childhood tuberculosis. Methods: Retrospective study of children < 13 years of age at Tygerberg ...

Beijing and Haarlem genotypes are overrepresented among children with drug-resistant tuberculosis in the Western Cape province of South Africa

Marais B.J.; Victor T.C.; Hesseling A.C.; Barnard M.; Jordaan A.; Brittle W.; Reuter H.; Beyers N.; Van Helden P.D.; Warren R.M.; Schaaf H.S. (2006)

Drug resistance among children with culture-confirmed tuberculosis (TB) provides an accurate measure of transmitted drug resistance within the community. We describe the genotype diversity in children with culture-confirmed ...

Improvement in mycobacterial yield and reduced time to detection in pediatric samples by use of a nutrient broth growth supplement

Brittle W.; Marais B.J.; Hesseling A.C.; Schaaf H.S.; Kidd M.; Wasserman E.; Botha T. (2009)

There is an urgent need to improve the methods used for the bacteriological diagnosis of childhood mycobacterial disease. This study compared the mycobacterial yields and the times to detection (in days) of mycobacteria ...