Outbreak of severe dengue associated with DENV-3 in the city of Manado, North Sulawesi, Indonesia.

BACKGROUND: In early 2019, an outbreak of severe dengue was reported in Manado, North Sulawesi Province, Indonesia. This epidemic raised public concern and recorded the highest number of cases in the last 10 years. This study aimed to determine the clinical spectrum, disease aetiology and virological characteristics associated with this outbreak of severe dengue. METHODS: Dengue was diagnosed using non-structural protein 1 detection, reverse transcription polymerase chain reaction and immunoglobulin (Ig)G/IgM serology. Envelope gene sequencing was conducted to determine the phylogeny of the dengue virus (DENV). RESULTS: In total, 146 patients with a median age of 8 years (interquartile range IQR 5-11 years) were recruited. Most patients experienced expanded dengue syndrome, characterized by severe organ involvement including liver enlargement, stomach ache and coagulation problems. During the outbreak, DENV-3 was the dominant serotype (75.9%). Smaller numbers of DENV-1, -2 and -4 were also detected. Phylogenetically, the dominant DENV-3 strains were grouped in multiple clusters and were related to other Indonesian strains, suggesting the emergence of heterogenous local viruses. CONCLUSION: The occurrence of an outbreak of severe dengue in Manado was confirmed, and DENV-3 was found to be the dominant serotype during the outbreak. This study shows the benefits of virological surveillance in understanding the aetiological agents responsible for outbreaks of severe dengue.

Case Report: Severe Plasmodium vivax Malaria Mimicking Sepsis in a Neonate.

Severe congenital malaria associated with Plasmodium vivax is uncommon. In Indonesia, most congenital malaria cases are due to Plasmodium falciparum infections. Most cases of congenital or neonatal malaria in endemic areas are diagnosed from peripheral smear as part of routine sepsis workup. Differentiating congenital and acquired neonatal malaria is very difficult. The case presented in this study describes severe P. vivax malaria with cholestatic jaundice and sepsis-like signs and symptoms in neonates. The mother was asymptomatic and the neonate was successfully treated with intravenous artesunate. Severe P. vivax malaria with cholestatic jaundice in neonates is an uncommon condition that should be included in the differential diagnosis of infants displaying hemolytic anemia, thrombocytopenia, cholestatic jaundice, and hepatosplenomegaly in malaria-endemic zones. Early diagnosis can prevent the use of unnecessary antibiotics and mortality of neonates.

Plasmodium falciparum found in the bone marrow of a child in Manado City, East Indonesia: A case report.

In Indonesia, there are at least 1.3 million cases of malaria each year and Plasmodium falciparum appears to be the most common Plasmodium. The finding of Plasmodium is important for the diagnosis and management of malaria. This is a case of a 4-year-and-9-month-old male who lived in Manado, East Indonesia. He presented with a prolonged fever, was pale in appearance, and was easily fatigued over the last 3 weeks. Hepato-splenomegaly was found on the initial physical examination. Preliminary laboratory findings found pancytopenia and severe anemia. Before he was referred to our hospital, at the primary health center, the initial work-up was negative for Plasmodium with the serial Rapid Diagnostic Test and microscopic peripheral blood smears. Since there were signs and symptoms mimicking malignancy, the patient was referred to our hospital for further malignancy work-up. A bone marrow puncture was done and we incidentally found Plasmodium falciparum in a microscopic bone marrow smear. This was a rare case because Plasmodium was not initially found in the preliminary work-up (Rapid Diagnostic Test and Microscopic) and qPCR is not a routine work-up for Plasmodium suspected patients. Although the mortality rate of malaria is high, this condition can be treated if the clinician was aware of the clinical signs and symptoms in the early onset and prompt medical treatment is administered. In a severe case with an unclear etiology of fever and with signs and symptoms mimicking malignancy, qPCR is recommended. However, a bone marrow puncture can also be considered to exclude the possibility of a malaria infection.