High incidence of asymptomatic cases during an outbreak of Plasmodium malariae in a remote village of Malaysian Borneo

An outbreak of Plasmodium malariae occurred in Sonsogon Paliu village in the remote area of Ulu Bengkoka sub-district of Kota Marudu, Northern Sabah, Malaysian Borneo from July through August 2019. This was the first outbreak of malaria in this village since 2014. On 11.sup.th July 2019 the Kota Kin...

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Veröffentlicht in:PLoS neglected tropical diseases 2021-06, Vol.15 (6), p.e0009450-e0009450
Hauptverfasser: Naserrudin, Nurul Athirah, Abdul Aziz, Emira Izzati, Aljet, Erdie, Mangunji, George, Tojo, Bumpei, Jeffree, Mohammad Saffree, Culleton, Richard, Ahmed, Kamruddin
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container_title PLoS neglected tropical diseases
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creator Naserrudin, Nurul Athirah
Abdul Aziz, Emira Izzati
Aljet, Erdie
Mangunji, George
Tojo, Bumpei
Jeffree, Mohammad Saffree
Culleton, Richard
Ahmed, Kamruddin
description An outbreak of Plasmodium malariae occurred in Sonsogon Paliu village in the remote area of Ulu Bengkoka sub-district of Kota Marudu, Northern Sabah, Malaysian Borneo from July through August 2019. This was the first outbreak of malaria in this village since 2014. On 11.sup.th July 2019 the Kota Kinabalu Public Health Laboratory notified the Kota Marudu District Health Office of a Polymerase Chain Reaction (PCR) positive case of P. malariae. This index case was a male from Sulawesi, Indonesia working for a logging company operating in Sonsogon Paliu. During the resulting outbreak, a total of 14 symptomatic cases were detected. All of these cases were positive by thick and thin blood smear examination, and also by PCR. During the outbreak, a mass blood survey screening was performed by light-microscopy and PCR. A total of 94 asymptomatic villagers 31 (33.0%) were PCR positive but thick and thin blood smear negative for P. malariae. Both symptomatic and asymptomatic cases received treatment at the district hospital. When symptomatic and asymptomatic cases were considered together, males (29/45. 64.5%) were infected more than females (16/45, 35.6%), the male:female ratio being 1.8:1. Adults were the predominant age group infected (22/45, 48.9%) followed by adolescents (19/45, 42.2%) and children under five years of age (4/45, 8.9%). This report illustrates that symptomatic and submicroscopic cases pose a challenge during P. malariae outbreaks and that PCR is a valuable tool for their identification. The rapid identification and control of imported malaria is crucial for the continued control of malaria in Malaysia.
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subjects Adolescents
Adults
Age groups
Asymptomatic
Biology and Life Sciences
Blood
Carrier state (Communicable diseases)
Children
DNA
Epidemics
Females
Health aspects
Human diseases
Identification
Infections
Insecticides
Laboratories
Malaria
Malaysia
Males
Medicine and Health Sciences
Microscopy
Mosquitoes
Nucleotide sequence
Outbreaks
Parasites
PCR
People and Places
Plasmodium malariae
Polymerase chain reaction
Public health
Questionnaires
Statistical analysis
Statistics
Surveying
Tropical diseases
Vector-borne diseases
Villages
title High incidence of asymptomatic cases during an outbreak of Plasmodium malariae in a remote village of Malaysian Borneo
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