Claudia Wallrauch

Dr. Claudia Wallrauch


Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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8 March 2022 in Annals of Global Health
Verified
Journal Article
Open access
PDF file
THTom Heller
Tom Heller
DDDouglas Damba
Douglas Damba
TKTapiwa Kumwenda
Tapiwa Kumwenda
JHJacqueline Huwa
Jacqueline Huwa
CKChristine Kamamia
Christine Kamamia
HTHannock Tweya
Hannock Tweya
100 bed medical ward in referral hospital, Lilongwe, Malawi. HIV positive patients admitted to hospital often have advanced HIV disease (AHD) and are at risk for mortality. WHO guidelines suggest a package of care for AHD; these are often not implemented, especially in inpatient settings. We describe an implementation model for AHD care, its outcomes in routine care and provide cost estimates. An “AHD care room” was established staffed by HIV counselor, nurse, and clinical officer allowing Provider Initiated Testing and Counseling, diagnostic testing for AHD and ensuring availability of HIV and TB drugs for rapid treatment initiation. In the observation period from January to December 2020, a total of 1549 medical inpatients were tested for HIV (coverage 77.1%); 69 tested positive (yield 4.5%). The total proportion of HIV positive was 32.3% (638 already on ART and 69 newly diagnosed). CD4+ testing was done in 460 medical inpatients (65.1%); 245 (53.2%) were below 200 cells/ml and thus met definition of AHD. A total of 238 received S-CrAg tests; 39 (16.3%) were positive; 62 (28.3%) of 219 U-LAM tests were positive. The cost per identification of HIV positive patient was US$ 110.8; per AHD diagnosis between US$ 17.1 to 78.9; per positive S-CrAg test US$ 18.5 and per positive U-LAM test US$ 17.5. Our model successfully implemented AHD services according to WHO guidelines and provides basic costing data. Similar services could be implemented in other hospitals in LMICs.

23 December 2023 in Viruses
Verified
Journal Article
Open access
PDF file
HKHope Kanise
Hope Kanise
JOJoep J van Oosterhout
Joep J van Oosterhout
PBPachawo Bisani
Pachawo Bisani
JSJohn Songo
John Songo
BMBilaal W. Matola
Bilaal W. Matola
THTom Heller
Tom Heller
Millions of Africans are on dolutegravir-based antiretroviral therapy (ART), but few detailed descriptions of dolutegravir resistance and its clinical management exist. We reviewed HIV drug resistance (HIVDR) testing application forms submitted between June 2019 and October 2022, data from the national HIVDR database, and genotypic test results. We obtained standardized ART outcomes and virological results of cases with dolutegravir resistance, and explored associations with dolutegravir resistance among individuals with successful integrase sequencing. All cases were on two nucleoside reverse transcriptase inhibitors (NRTIs)/dolutegravir, and had confirmed virological failure, generally with prolonged viremia. Among 89 samples with successful integrase sequencing, 24 showed dolutegravir resistance. Dolutegravir resistance-associated mutations included R263K (16/24), E138K (7/24), and G118R (6/24). In multivariable logistic regression analysis, older age and the presence of high-level NRTI resistance were significantly associated with dolutegravir resistance. After treatment modification recommendations, four individuals (17%) with dolutegravir resistance died, one self-discontinued ART, one defaulted, and one transferred out. Of the 17 remaining individuals, 12 had follow-up VL results, and 11 (92%) were <1000 copies/mL. Twenty-four cases with dolutegravir resistance among 89 individuals with confirmed virological failure suggests a considerable prevalence in the Malawi HIV program. Successful management of dolutegravir resistance was possible, but early mortality was high. More research on the management of treatment-experienced individuals with dolutegravir resistance is needed.

Verified
Journal Article
Open access
PDF file
TKTapiwa Kumwenda
Tapiwa Kumwenda
DHDaniel Zachary Hodson
Daniel Zachary Hodson
KRKelvin Rambiki
Kelvin Rambiki
EREthel Rambiki
Ethel Rambiki
YFYuri Fedoriw
Yuri Fedoriw
MPMatthew Painschab
Matthew Painschab
Kaposi sarcoma-associated herpes virus (KSHV), also known as human herpes virus 8 (HHV-8), is the primary etiologic cause of Kaposi sarcoma (KS) and KSHV Inflammatory Cytokine Syndrome (KICS). Patients with KICS demonstrate symptoms of systemic inflammation, high KSHV viral load, elevation of inflammatory markers, and increased mortality. Management requires rapid diagnosis, treatment of underlying HIV, direct treatment of KS, and addressing the hyperimmune response. While a case definition based on clinical presentation, imaging findings, laboratory values, KSHV viral load, and lymph-node biopsy has been proposed, some of the required investigations are frequently unavailable in resource-constrained settings. Due to these challenges, KICS likely remains underdiagnosed and undertreated in these settings. We report a case of a 19-year-old woman living with HIV, and intermittent adherence to her ART, who presented with hypotension and acute hypoxemic respiratory failure. She was found to have high KSHV and HIV viral loads, low CD4 count, anemia, thrombocytopenia, hypoalbuminemia, and elevated inflammatory markers. On bedside ultrasound, she was found to have bilateral pleural effusions, ascites, an enlarged spleen, and hyperechoic splenic lesions. The diagnosis of KICS was made based on this constellation of findings. Weighing the risk and benefits of steroid administration in KS patients, the patient was successfully treated by the continuation of ART and the initiation of paclitaxel chemotherapy and steroids. We propose an adapted case definition relevant to the resource-constrained context. Due to the dual burden of KSHV and HIV in sub-Saharan Africa, additional cases of KICS are likely, and this syndrome will contribute to the burden of early mortality in newly diagnosed HIV patients. Addressing the diagnostic and therapeutic challenges of KICS must be a part of the overall management of the HIV pandemic.

4 September 2024 in The American Journal of Tropical Medicine and Hygiene
Verified
Journal Article
Open access
PDF file
DHDaniel Zachary Hodson
Daniel Zachary Hodson
TKTapiwa Kumwenda
Tapiwa Kumwenda
CWClaudia Wallrauch
Claudia Wallrauch
EREthel Rambiki
Ethel Rambiki
CTChristopher Tymchuk
Christopher Tymchuk
THTom Heller
Tom Heller
: Miliary tuberculosis is a form of disseminated tuberculosis that can be difficult to detect when the classic pattern is absent on chest radiograph and advanced cross-sectional imaging is not readily available. While the focused assessment with sonography for HIV-associated tuberculosis (FASH) protocol for extrapulmonary tuberculosis emphasizes easy-to-teach findings, experienced sonographers may detect additional, subtler signs that can aid in diagnosis. We report a case of a 20-year-old man with miliary tuberculosis diagnosed on computed tomography of the chest. We describe subtle sonographic signs of disseminated tuberculosis including subpleural irregularities and comet-tail artifacts, a bright liver pattern, peritoneal nodules, and a nonspecific sponge spleen pattern. We then discuss important differential diagnoses for each finding. Knowledge of subtle sonographic signs outside of the FASH protocol can aid clinicians in detecting disseminated tuberculosis, including the miliary form, when advanced imaging may not be available.

5 July 2023 in The American Journal of Tropical Medicine and Hygiene
Verified
Journal Article
Closed access
PDF file
GSGiacomo Stroffolini
Giacomo Stroffolini
KRKelvin Rambiki
Kelvin Rambiki
CWClaudia Wallrauch
Claudia Wallrauch
TTTamiwe Tomoka
Tamiwe Tomoka
EBEnrico Brunetti
Enrico Brunetti
THTom Heller
Tom Heller
: Clinical skin manifestations are commonly seen in resource-limited settings, but they are frequently misdiagnosed due to the lack of microbiological tests with ensuing stigma and long-term disability. The adoption of portable ultrasound devices, which extend physical examination in the hands of trained clinicians, has partially improved the situation. Specific protocols, such as focused assessment with sonography for HIV-associated tuberculosis (FASH), have led to simplified diagnostic pathways. Here we describe a case of bacillary angiomatosis in a patient with advanced HIV disease presenting with subacute unusual cutaneous lesions. The patient also presented with significant weight loss, anemia, and prostration. Highly sensitive rapid tests for tuberculosis and cryptococcosis were negative, and CD4 count was very low. Ultrasound scanning (US) and biopsy of the cutaneous lesions finally led to diagnosis and treatment. This report illustrates the benefits of integrating ultrasound-based protocols with clinical skills, as the diagnosis was suspected based on clinical presentation and US and confirmed by pathology. The importance of adoption of US protocols by infectious diseases clinicians is discussed.

8 November 2024 in Cancers
Verified
Journal Article
Open access
PDF file
FMFatsani Rose Manase
Fatsani Rose Manase
ASAllison Silverstein
Allison Silverstein
WKWilliam Kamiyango
William Kamiyango
JVJimmy Ba Villiera
Jimmy Ba Villiera
CDClement Dziwe
Clement Dziwe
CMCasey McAtee
Casey McAtee
Background/Objectives: Kaposi sarcoma (KS) is a common lymphatic endothelial cancer among children with and without HIV in central and eastern Africa. Despite its clinical heterogeneity, its various clinical phenotypes are often grouped together in staging and treatment algorithms. Patients with KS tumor-associated edema, referring to hard, non-pitting lesions which often lead to chronic disability, represent a unique, understudied subgroup of children with KS. To continue our work defining the distinct phenotypes of pediatric KS, this study aimed to assess the clinical progression and outcomes of KS edema in children. Methods: A retrospective cohort study was conducted at Kamuzu Central Hospital in Lilongwe, Malawi, focusing on children diagnosed with KS edema between 2010 and 2023. Results: We identified 52 children with KS edema, representing 27% of all patients with KS. Initial chemotherapy resulted in a clinical response in 92% of patients, but 46% experienced relapse or disease progression with a median time to first relapse of 12 months. Multiple progressions were common, with 31% of patients experiencing two or more events. Event-free survival at two years was 32%, dropping to 24% at five years, while overall survival was 73% at two years and 57% at five years. Relapse was more common among patients with KS edema versus those without it (relative risk = 2.1; 95%CI, 1.4–3.2; p < 0.001). Eight patients (15%) relapsed with visceral disease, five of whom originally presented with KS edema alone. Conclusions: Patients with KS edema have a unique, relapsing-remitting pattern of disease with a high risk of relapse relative to other forms of KS with subsequent long-term mortality, even after initial positive treatment responses. Late relapse and mortality with visceral disease are possible even among children presenting initially with KS edema alone. Children with KS edema require long-term follow-up, and novel treatment approaches tailored towards preventing frequent relapse are needed.