191 research outputs found
Plasmodium knowlesi and Wucheriria bancrofti: Their vectors and challenges for the future
No full textMalaria and filariasis still continue to pose public health problems in developing countries of the tropics. Although plans are ongoing for the elimination of both these parasitic vector borne diseases, we are now faced with a daunting challenge as we have a fifth species, Plasmodium knowlesi a simian malaria parasite affecting humans. Similarly in peninsular Malaysia, filariasis was mainly due to Brugia malayi, however, we now see cases of W. bancrofti in immigrant workers coming into the country. Work is on going to eliminate malaria and filariasis from the country. In order to be successful we need to revamp our control measures. Thus this paper attempts to review the vectors of malaria and filariasis in Southeast Asia with special emphasis on P. knowlesi and W. bancrofti and their control strategies
Transmission Potential of Wuchereria bancrofti by Culex quinquefasciatus in Malaysia and Its Global Significance
No full textSystematic study of the Collembola of the Pacific region
No full textThis study deals with the systematics and distribution of Collembola mainly from the South West Pacific region. Twenty-six new species are described. The collembolan fauna of the South West Pacific region shows strong affinities to both Australia and New Zealand zoogeographically. It shows a north-south as well as east-west migration and towards the east the fauna becomes progressively poorer in variety and numbers of species
Histopathology of Brugia pahangi and plasmodium berghei ANKA co-infection in the gerbil (Meriones unguiculatus)
No full textCo-infection with multiple different parasites is a common phenomenon in both human and animals. Among parasites that frequently co-infect the same hosts, are the filarial worms and malaria parasites. Despite this, the mechanisms underlying the interactions between these parasites is still relatively unexplored with very few studies available on the resulting pathologies due to co-infection by filarial nematodes and malaria parasites. Hence, this study investigated the histopathological effect of Brugia pahangi and Plasmodium berghei ANKA (PbA) infections in gerbil host. Gerbils grouped into B. pahangi-infected, PbA-infected, B. pahangi and PbA-coinfected, and uninfected control, were necropsied at different time points of post PbA infections. Brugia pahangi infections in the gerbils were first initiated by subcutaneous inoculation of 50 infective larvae, while PbA infections were done by intraperitoneal injection of 10 6 parasitized red blood cells after 70 days patent period of B. pahangi. Organs such as the lungs, kidneys, spleen, heart and liver were harvested aseptically at the point of necropsy. There was significant hepatosplenomegaly observed in both PbA-infected only and coinfected gerbils. The spleen, liver and lungs were heavily pigmented. Both B. pahangi and PbA infections (mono and co-infections) resulted in pulmonary edema, while glomerulonephritis was associated with PbA infections. The presence of both parasites induced extramedullary hematopoiesis in the spleen and liver. These findings suggest that the pathologies associated with coinfected gerbils were synergistically induced by both B. pahangi and PbA infections
Simian Malaria Parasites: Special Emphasis on Plasmodium knowlesi and Their Anopheles Vectors in Southeast Asia
No full text
Short communication: susceptibility of culex sitiens to Japanese encephalitis virus in peninsular Malaysia
No full textThe susceptibility of Culex sitiens to Japanese Encephalitis (JE) virus was examined in the laboratory. Cx. sitiens became infected with JE virus on day 8 and subsequently it is able to transmit the virus when it takes a blood meal. Both parts of the experiment were carried out using artificial membrane feeding technique
Research note transmission potential of Wuchereria bancrofti by Culex quinquefasciatus in urban areas of Malaysia
No full textLaboratory strain of the Malaysian Culex quinquefasciatus was susceptible to Wuchereria bancrofti. Thirty three percent of the Cx. quinquefasciatus that fed on W. bancrofti patient were infective after 12-14 days. There is a possibility for W. bancrofti to occur in the urban areas of the Malaysia in the near future
Nucleotide and Amino Acid Sequences in The PreM Region of A Japanese Encephalitis Virus Strain Isolated from A Pool of Aedes albopictus and Ae. butleri Mosquitoes Captured in Peninsula Malaysia in 1992
No full textOne strain of Japanese encephalitis (JE) virus isolated from a pool of Ae. albopictus and Ae. butleri in Peninsula Malaysia in 1992 was sequenced for its PreM gene region, by direct sequencing the product from reverse transcriptase polymerase chain reaction (RTPCR). The sequence in the length of 240 nucleotides (nt) and deduced amino acid (AA) sequence were compared with the published sequences for the various JE virus strains from different geographical regions. This virus strain, MaSAr39692, showed a close homology to the strains from epidemic areas such as Japan, China, Taiwan, Sri Lanka and India. The homology between MaSAr39692 and JaOArS982 strain, for which entire genome sequence was first determined, was 95.8%, with 10 nt and 3 AA sequence divergence
Emerg Infect Dis
No full textWe detected 2 natural, asymptomatic Plasmodium inui monoinfections in humans in Malaysia by using nested PCR on concentrated high-volume blood samples. We found a P. inui-positive Anopheles cracens mosquito in the same site as the human infections. Investigators should use ultrasensitive detection methods to identify simian malaria parasite transmission in humans
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