1.Asymptomatic lymphatic filariasis in an elderly patient from Bako, Sarawak: A case report and public health implications
Ngui R. ; Johnny P. ; Chai P.T. ; Sidi Omar ; Lim S.H. ; Jinam T. ; Yaman K. ; Tan T.K. ; Lim K.J. ; Seling N.R. ; Jiee S.F.
Tropical Biomedicine 2026;43(No. 1):22-25
Lymphatic filariasis (LF) remains a significant public health challenge in many tropical regions where the
disease is endemic. In Malaysia, LF is found in small pockets across the country. Asymptomatic carriers
play a critical role in transmission but are often undetected. This report details an investigation of an
asymptomatic filariasis reported by local health authorities involving an 83-year-old female patient
residing in the Bako area, Sarawak. Despite being immobile due to a stroke, routine screening identified
an infection with Brugia malayi through microscopy and a rapid diagnostic test. Interestingly, the patient
exhibited no acute or chronic symptoms typically associated with filariasis. Contact tracing among
her family members revealed that her son was also infected. Both patients received treatment with
diethylcarbamazine (DEC) at a dosage of 6 mg/kg, along with albendazole 400 mg and ivermectin 12
mg. Preventive measures included health education, entomological studies, and the implementation of
a ‘Test & Treat Filariasis’ program in the village. By documenting both the index case and a secondary
asymptomatic case within the same household, the study provides a strong example of how routine
screening and contact tracing can identify hidden sources of infection. This adds significant value to
LF elimination strategies and emphasizes the importance of community-level surveillance programs.
Coordinated efforts by health authorities, including contact tracing, environmental assessments, and
targeted treatment, are essential for controlling the spread of LF and safeguarding public health.
2.In vitro antiviral activity of medicinal mushroom Ganoderma neo-japonicum Imazeki against enteroviruses that caused hand, foot and mouth disease
Ang, W.X. ; Sarasvathy, S. ; Kuppusamy, U.R. ; Sabaratnam, V. ; Tan, S.H. ; Wong, K.T. ; Perera, D. ; Ong, K.C.
Tropical Biomedicine 2021;38(No.3):239-247
Hand, foot and mouth disease (HFMD) is a highly contagious viral disease that predominantly affects children younger than 5 years old. HFMD is primarily caused by enterovirus A71 (EVA71) and coxsackievirus A16 (CV-A16). However, coxsackievirus A10 (CV-A10) and coxsackievirus A6 (CV-A6) are being increasingly reported as the predominant causative of HFMD outbreaks worldwide since the past decade. To date, there are still no licensed multivalent vaccines or antiviral drugs targeting enteroviruses that cause HFMD, despite HFMD outbreaks are still being frequently reported, especially in Asia-Pacific countries. The high rate of transmission, morbidity and potential neurological complications of HFMD is indeed making the development of broad-spectrum antiviral drugs/agents against these enteroviruses a compelling need. In this study, we have investigated the in vitro antiviral effect of 4 Ganoderma neo-japonicum Imazeki (GNJI) crude extracts (S1-S4) against EV-A71, CV-A16, CV-A10 and CV-A6. GNJI is a medicinal mushroom that can be found growing saprophytically on decaying bamboo clumps in Malaysian forests. The antiviral effects of this medicinal mushroom were determined using cytopathic inhibition and virus titration assays. The S2 (1.25 mg/ml) hot aqueous extract demonstrated the highest broad-spectrum antiviral activity against all tested enteroviruses in human primary oral fibroblast cells. Replication of EV-A71, CV-A16 and CVA10 were effectively inhibited at 2 hours post-infection (hpi) to 72 hpi, except for CV-A6 which was only at 2 hpi. S2 also has virucidal activity against EV-A71. Polysaccharides isolated and purified from crude hot aqueous extract demonstrated similar antiviral activity as S2, suggesting that polysaccharides could be one of the active compounds responsible for the antiviral activity shown by S2. To our knowledge, this study demonstrates for the first time the ability of GNJI to inhibit enterovirus infection and replication. Thus, GNJI is potential to be further developed as an antiviral agent against enteroviruses that caused HFMD.


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