Porpon Rotjanapan

Dr. Porpon Rotjanapan

orcid

Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

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

Representative Publications

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1 June 2020 in International Journal of Infectious Diseases
Verified
Journal Article
Open access
BTBan Hock Tan
Ban Hock Tan
ACArunaloke Chakrabarti
Arunaloke Chakrabarti
APAtul Patel
Atul Patel
MCMitzi Marie M. Chua
Mitzi Marie M. Chua
PSPei-Lun Sun
Pei-Lun Sun
Yang-ching ChenYang-ching Chen
Yang-ching Chen
Invasive fungal diseases (IFD) are a serious threat, but physicians in Asia lack access to many advanced diagnostics in mycology. It is likely that they face other impediments in the management of IFD. A gap analysis was performed to understand the challenges Asian physicians faced in medical mycology. The Asia Fungal Working Group (AFWG) conducted a web-based survey on management practices for IFD among clinicians in China, India, Indonesia, Philippines, Singapore, Taiwan and Thailand. Among 292 respondents, 51.7% were infectious disease (ID) specialists. Only 37% of respondents had received formal training in medical mycology. They handled only around 2-4 proven cases of each fungal infection monthly, with invasive candidiasis the most common. For laboratory support, the majority had access to direct microscopy (96%) and histopathology (87%), but galactomannan and azole levels were available to 60% and 25% of respondents, respectively. The majority (84%) used clinical parameters for treatment response monitoring, and 77% followed the Infectious Diseases Society of America guidelines. The majority (84%) did not use the services of an ID physician. Where febrile neutropenia was concerned, 74% of respondents used the empirical approach. Only 30% had an antifungal stewardship program in their hospital. Eighty percent could not use preferred antifungals because of cost. The survey identified inadequacies in medical mycology training, non-culture diagnostics, access to antifungal drugs, and local guidelines as the major gaps in the management of IFDs in Asian countries. These gaps are targets for improvement.

31 January 2020 in Open Forum Infectious Diseases
Verified
Journal Article
Open access
PDF file
WLWannada Laisuan
Wannada Laisuan
PPPrapaporn Pisitkun
Prapaporn Pisitkun
PNPintip Ngamjanyaporn
Pintip Ngamjanyaporn
TSThanitta Suangtamai
Thanitta Suangtamai
PRPorpon Rotjanapan
Porpon Rotjanapan
Background: Adult-onset immunodeficiency associated with interferon-γ autoantibody (IGA) is an emerging disease. The majority of patients require both antimicrobial and immunosuppressive treatments. However, anti-CD20 therapy is not fully accessible in a resource-limited setting to date.Background: The objectives of this work were to study the efficacy of cyclophosphamide treatment and the role of laboratory biomarkers for disease progression monitoring.Methods: A prospective pilot cohort study was conducted among patients with anti-interferon-γ autoantibodies (IGA) who had recurrent infections and required long-term antimicrobial therapy between 2015 and 2018. The patients were categorized into 2 groups: receipt of intravenous cyclophosphamide (IVCY) and receipt of anti-CD20 therapy (RTX). Clinical and laboratory data were determined.Results: A total of 17 IGA patients were enrolled. Prolonged fever was the most common manifestation, and the most common infection identified was nontuberculous mycobacterial infections. Both were found in 88.24% of all patients.After completion of IVCY, 9/11 patients achieved complete remission and tended to reach remission faster compared with individuals in the RTX group. The median duration from treatment initiation to remission (interquartile range) was 84 (42–154) days in the IVCY group and 99 (51–202) days in the RTX group. In remission patients, the biomarkers of interest had normalized after treatment, except interferon γ autoantibody titers. There were no differences in adverse events among the 2 groups.Conclusion: IVCY may be considered as alternative therapy in this population, especially in resource-limited countries. A comparable clinical outcome to RTX may support its use on a larger scale. However, further study is encouraged.

21 February 2024 in BMC Complementary Medicine and Therapies
Verified
Journal Article
Open access
PDF file
PDPitchaya Dilokpattanamongkol
Pitchaya Dilokpattanamongkol
Chadakan YanChadakan Yan
Chadakan Yan
KJKulapong Jayanama
Kulapong Jayanama
PNPintip Ngamjanyaporn
Pintip Ngamjanyaporn
SSSomnuek Sungkanuparph
Somnuek Sungkanuparph
PRPorpon Rotjanapan
Porpon Rotjanapan
Background: Vitamin D supplementation for infectious diseases has been discussed, but its role in COVID-19 is unclear. Therefore, this study examined the clinical outcomes of COVID-19 pneumonia patients who received vitamin D supplementation. Methods: This prospective, open-label, randomized controlled trial was conducted in a university hospital between July 2020 and March 2022. The inclusion criteria were patients aged ≥ 18 years with COVID-19 pneumonia patients. The patients were randomized into two groups: an intervention group receiving vitamin D supplementation (alfacalcidol, two mcg orally daily) until discharge and a control group. The clinical outcomes were pneumonia treatment duration, length of hospital stay, and change in pneumonia severity index between enrollment and discharge. Subgroup analysis was conducted for supplemental oxygen use, high-dose corticosteroid administration, evidence of lymphopenia, C-reactive protein concentration, and total serum vitamin D concentration. Adverse events were monitored. Results: Two hundred ninety-four patients were recruited (147 per group). The two groups did not differ in pneumonia treatment duration to discharge (p = 0.788) or length of hospital stay (p = 0.614). The reduction in the pneumonia severity index between enrollment and discharge was more significant in the intervention group (p = 0.007); a significant decrease was also observed among patients who had C-reactive protein > 30 mg/L (p < 0.001). No adverse reactions were recorded. Conclusions: Adding active vitamin D to standard treatment may benefit COVID-19 pneumonia patients who require supplemental oxygen or high-dose corticosteroid therapy or who have high C-reactive protein concentrations (> 30 mg/L) upon treatment initiation. Trial registration: Thai Clinical Trials Registry TCTR20210906005 (retrospectively registered, 6 September 2021).

1 January 2018 in Transplantation Proceedings
Verified
Journal Article
Open access
PYP. Yooprasert
P. Yooprasert
PRPorpon Rotjanapan
Porpon Rotjanapan
Data on BK virus-associated nephropathy (BKVAN) and treatment strategy in a resource-limited country are scarce. This study aimed to evaluate epidemiology of BKVAN and its situation in Thailand. A retrospective analysis was conducted among adult kidney transplant recipients at Ramathibodi Hospital from October 2011 to September 2016. Patients' demographic data, information on kidney transplantation, immunosuppressive therapy, cytomegalovirus and BK virus infections, and allograft outcomes were retrieved and analyzed. This study included 623 kidney transplant recipients. Only 327 patients (52.49%) received BK virus infection screening, and 176 of 327 patients had allograft dysfunction as a trigger for screening. BKVAN was identified in 39 of 327 patients (11.93%). Deceased donor transplantation and cytomegalovirus infection were associated with a higher risk of BKVAN (odds ratio = 2.2, P = .024, 95% confidence intervals [1.1, 4.43], and odds ratio = 2.6, P = .006, 95% confidence intervals [1.29, 5.26], respectively). BKVAN patients were at significantly higher risk for allograft rejection (P < .001) and allograft failure (P = .036). At the end of the study, 4 graft losses were documented (12.12%). BKVAN was associated with high rate of allograft rejection and failure. However, surveillance of its complications has been underperformed at our facility. Implementing a formal practice guideline may improve allograft outcome in resource-limited countries.

1 June 2019 in Infection and Drug Resistance
Verified
Journal Article
Open access
PDF file
NPNisha Pongpech
Nisha Pongpech
PRPorpon Rotjanapan
Porpon Rotjanapan
Background: Talaromyces marneffei (T. marneffei) is an important opportunistic pathogen found in human immunodeficiency virus-positive individuals in Southeast Asia, Southern China, and Northeastern India. Patients with disseminated talaromycosis commonly develop multi-organ involvement including the skin. In this report, we describe the clinical presentation, investigation, management, and clinical outcome of an acquired immune deficiency syndrome (AIDS) patient with newly diagnosed disseminated talaromycosis without skin involvement. Case presentation: A 27-year-old male with AIDS presented with acute onset of abdominal pain for 4 days and fever for 2 days. He had been diagnosed with AIDS, pneumocystis pneumonia, and presumptive smear-negative pulmonary tuberculosis 2 months previously. His initial CD4 count was 91 cells/mm3,. After a 3-week course of trimethoprim/sulfamethoxazole and anti-tuberculosis treatment, anti-retroviral therapy was initiated. Physical examination revealed left upper quadrant tenderness but no abnormal skin lesions. On this visit, his CD4 count rose to 272 cells/mm3, (19%). Computed tomography of the abdomen showed evidence of a small hypodense lesion with a thin enhancing rim at the spleen and extensive intra-abdominal lymphadenopathy. Empirical amphotericin B deoxycholate was administered in response to positive serum galactomannan, although this was switched to intravenous liposomal amphotericin B 1 week later because of acute kidney injury. Blood and bone marrow cultures for fungus grew T. marneffei on days 9 and 12, respectively. After 21 days of treatment, oral itraconazole replaced intravenous therapy. The patient was discharged home after 29 days in the hospital and continued to improve clinically at a follow-up visit as an outpatient. Conclusion: Talaromycosis is a fairly common opportunistic infection among AIDS patients in Thailand, despite a rise in CD4 count which may reflect a change in immune status. To a lesser extent, a systemic disease without skin involvement can be expected in real clinical practice.

27 October 2021 in Lupus Science & Medicine
Verified
Journal Article
Open access
PDF file
PRPorpon Rotjanapan
Porpon Rotjanapan
AJAunyakant Jaroensukrungruang
Aunyakant Jaroensukrungruang
PPPrapaporn Pisitkun
Prapaporn Pisitkun
PNPintip Ngamjanyaporn
Pintip Ngamjanyaporn
JMJittima Manonai
Jittima Manonai
SPSunchai Payungporn
Sunchai Payungporn
Objective: The risk factors associated with urinary tract infections (UTIs) in patients with SLE remain uncertain. We evaluated the vaginal microbiota pattern and its potential UTI-associated risk factors.Methods: A pilot cross-sectional study of patients with SLE was conducted at Ramathibodi Hospital, Bangkok, Thailand, during 2019–2020. Patients’ demographic data and relevant information were collected. Vaginal microbiota was assessed in all patients and in 10 healthy volunteers.Results: Fifty-two patients were enrolled (mean age: 46.1 years). All patients had SLE that was in low disease activity. As per the Simpson_e index, the within-group alpha diversity of the vaginal microbiota was low in the SLE with UTI and SLE receiving trimethoprim-sulfamethoxazole (TMP-SMX) prophylaxis groups. Multivariate logistic regression analysis revealed that TMP-SMX prophylaxis (adjusted OR (AOR), 30.96; 95% CI 3.63 to 264.11; p=0.002), elevated C3 levels (AOR, 35.33; 95% CI 1.33 to 936.67; p=0.033) and presence ofVeillonella disparin the vaginal microbiota (AOR, 6.68; 95% CI 1.27 to 35.07; p=0.025) were associated with UTI.Conclusions: The vaginal microbiota diversity differed between patients with lupus with and without UTI, and unnecessary administration of TMP-SMX prophylaxis may affect the alpha diversity of the vaginal microbiota.