Displaying publications 81 - 100 of 172 in total

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  1. Malaria and filariasis transmission in a village/forest setting in Baram District, Sarawak, Malaysia
    Chang MS, Doraisingam P, Hardin S, Nagum N
    J Trop Med Hyg, 1995 Jun;98(3):192-8.
    PMID: 7783279
    Entomological investigations on malaria and bancroftian filariasis transmission were carried out in the endemic area of Baram District, Sarawak. The Anopheles composition, survival and infection rates of malaria and filariasis were compared in the village and 0.5 km from the village ecotype, in forested areas. Anopheles leucosphyrus, An. barbirostris and An. donaldi are the vectors for malaria and bancroftian filariasis in both ecotypes. Biting and infection rates vary, but An. leucosphyrus differed with a peak around midnight in the forested area and soon after dusk in the village setting. The parous rate of An. leucosphyrus was significantly higher in the forest ecotype (P < 0.0001); however, the proportion of 3-parous and older was not overall higher in the forest ecotype (P = 0.68). The entomological inoculation of malaria parasites by An. leucosphyrus was comparatively higher in the forested areas (P > 0.5). The implications of malaria and filariasis transmission in the forested areas in Baram District are discussed.
    Matched MeSH terms: Filariasis/transmission*
  2. Lymphatic filariasis in Malaysia
    Oothuman P
    Family Practitioner, 1988;11<I> </I>:84-85.
    In Malaysia it was estimated in 1983 that 2.5 million people lived in endemic areas and from 1960 to 1984 more than 20,000 people were found to be infected. The more important filarial parasite is B. malayi. There are four main target areas for the control of filariasis, namely, mass or selective chemotherapy, reducing numbers of infected animal hosts, control of vectors and minimising human-vector contact.
    Matched MeSH terms: Filariasis
  3. Iron and iron oxide nanoparticles are highly toxic to Culex quinquefasciatus with little non-target effects on larvivorous fishes
    Murugan K, Dinesh D, Nataraj D, Subramaniam J, Amuthavalli P, Madhavan J, et al.
    Environ Sci Pollut Res Int, 2018 Apr;25(11):10504-10514.
    PMID: 28988379 DOI: 10.1007/s11356-017-0313-7
    The control of filariasis vectors has been enhanced in several areas, but there are main challenges, including increasing resistance to insecticides and lack of cheap and eco-friendly products. The toxicity of iron (Fe0) and iron oxide (Fe2O3) nanoparticles has been scarcely investigated yet. We studied the larvicidal and pupicidal activity of Fe0 and Fe2O3 nanoparticles against Culex quinquefasciatus. Fe0 and Fe2O3 nanoparticles produced by green (using a Ficus natalensis aqueous extract) and chemical nanosynthesis, respectively, were analyzed by UV-Vis spectrophotometry, FT-IR spectroscopy, XRD analysis, SEM, and EDX assays. In larvicidal and pupicidal experiments on Cx. quinquefasciatus, LC50 of Fe0 nanoparticles ranged from 20.9 (I instar larvae) to 43.7 ppm (pupae) and from 4.5 (I) to 22.1 ppm (pupae) for Fe2O3 nanoparticles synthesized chemically. Furthermore, the predation efficiency of the guppy fish, Poecilia reticulata, after a single treatment with sub-lethal doses of Fe0 and Fe2O3 nanoparticles was magnified. Overall, this work provides new insights about the toxicity of Fe0 and Fe2O3 nanoparticles against mosquito vectors; we suggested that green and chemical fabricated nano-iron may be considered to develop novel and effective pesticides.
    Matched MeSH terms: Filariasis
  4. Intraocular parasitism
    Rose L
    Med J Malaya, 1965 Sep;20(1):65-7.
    PMID: 4221425
    Matched MeSH terms: Filariasis/complications*
  5. Intradermal tests with Dirofilaria immitis extract in eosinophilic lung (tropical eosinophilia)
    Danaraj TJ, Schacher JF
    Am J Trop Med Hyg, 1959;8:640-643.
    The intradermal test using as antigen a 1 per cent saline extract of Dirofilaria immitis powder was performed in Singapore on 69 persons with eosinophilic lung, 32 with mild eosinophilia, 49 with filariasis, 75 normal Asians, and 66 normal Britishers. The test was positive in 100 per cent of the cases of eosinophilic lung, 73.5 per cent of the filariasis group, 59.4 per cent of cases of mild eosinophilia, 53.3 per cent of normal Asians, and 4.5 per cent of the Britishers. The filarial complement fixation test using a 1 per cent alcoholic extract of the same antigen gave a positive rate of 100 per cent in the eosinophilic lung group, whereas only 24.5 per cent of the filariasis patients gave a positive reaction. Skin sensitivity to D. immitis antigen persisted in the cases of eosinophilic lung even when the previously positive serologic reactions had become negative following treatment with diethylcarbamazine. Therefore, the intradermal test cannot be useful in the diagnosis of either filariasis or eosinophilic lung in Singapore. In view of the skin sensitivity to a filarial antigen demonstrated in patients suffering from eosinophilic lung, the etiologic possibility of an infection by a species of filarial worm found normally in nonhuman hosts is discussed.
    Matched MeSH terms: Filariasis
  6. Fulltext Inferring the phylogenetic position of Brugia pahangi using 18S ribosomal RNA (18S rRNA) gene sequence
    Fong MY, Asha T, Azdayanti M, Yee LL, Sinnadurai S, Rohela M
    Trop Biomed, 2008 Apr;25(1):87-92.
    PMID: 18600209 MyJurnal
    This paper presents the first reported use of 18S rRNA gene sequence to determine the phylogeny of Brugia pahangi. The 18S rRNA nucleotide sequence of a Malaysian B. pahangi isolate was obtained by PCR cloning and sequencing. The sequence was compared with 18S rRNA sequences of other nematodes, including those of some filarial nematodes. Multiple alignment and homology analysis suggest that B. pahangi is closely related to B. malayi and Wuchereria bancrofti. Phylogenetic trees constructed using Neighbour Joining, Minimum Evolution and Maximum Parsimony methods correctly grouped B. pahangi with other filarial nematodes, with closest relationship with B. malayi and W. bancrofti. The phylogeny of B. pahangi obtained in this study is in concordance with those previously reported, in which the 5S rRNA gene spacer region and cytochrome oxidase subunit I (COI) sequences were used.
    Matched MeSH terms: Filariasis/parasitology
  7. Fulltext Infective larvae of Cercopithifilaria spp. (Nematoda: Onchocercidae) from hard ticks (Ixodidae) recovered from the Japanese serow (Bovidae)
    Uni S, Bain O, Fujita H, Matsubayashi M, Fukuda M, Takaoka H
    Parasite, 2013;20:1.
    PMID: 23340227 DOI: 10.1051/parasite/2012001
    Hard ticks taken from the Japanese serow, Capricornis crispus, in Yamagata Prefecture, Honshu, harboured infective larvae of onchocercid filariae after incubation from the 22nd to the 158th day. Haemaphysalis flava and H. japonica contained one to eight filarial larvae; females, males and a nymph of the ticks were infected. The 44 infective larvae recovered were 612-1,370 μm long, and 11 of them, 930-1,340 μm long, were studied in detail. The larvae possessed the morphologic characteristics of the larvae of the genus Cercopithifilaria, namely an oesophagus with a posterior glandular part, no buccal capsule and a long tail with three terminal lappets. Five types (A to E) of infective larvae were identified based on the morphologic characteristics. While to date five species of Cercopithifilaria have been described from the Japanese serow, a specific identification of the larvae found in this study was generally not possible. Only type E larvae could be tentatively assigned to Cercopithifilaria tumidicervicata, as they had a cervical swelling similar to that of the adults of this species. A key for the identification of the five larval types is presented. The study presents circumstantial evidences indicating that H. flava and H. japonica may transmit Cercopithifilaria spp. to Japanese serows. It also suggests the possibility that such filarial larvae will be found in hard ticks anywhere, because Cercopithifilaria is distributed worldwide, though this genus generally goes unnoticed, as its microfilariae occur in the skin, not in the blood, of host animals.
    Matched MeSH terms: Filariasis/parasitology; Filariasis/transmission; Filariasis/veterinary*
  8. Indirect hemagglutination with extracts of various helminths in eosinophilic lung (tropical eosinophilia)
    Pacheco G, Danaraj TJ
    Am J Trop Med Hyg, 1966 May;15(3):355-8.
    PMID: 5938434
    Saline extracts of ether-treated Dirofilaria immitis, Ascaris suum, and Ancylostoma spp. were used in indirect hemagglutination tests of serum from 164 patients with a diagnosis of eosinophilic lung and 114 persons with other diseases or no disease (blood donors). In the first group, positive reactions with one, two or all three antigens were obtained in 89 percent of cases and the titers, at medium or high levels in 77 percent, decreased after treatment with diethylcarbamazine. In the other group, antibodies were demonstrable in the serum of only 22 percent of cases and titers usually were low. These observations indicate the presence of several antigen-antibody systems, some of which appear to be specific. With extracts of Dirofilaria the indirect hemagglutination and the complement-fixation tests were similar in sensitivity and specificity, but the results from neither test appeared to indicate infection with a specific worm.
    Matched MeSH terms: Filariasis/immunology*
  9. Fulltext Impact of six rounds of mass drug administration on Brugian filariasis and soil-transmitted helminth infections in eastern Indonesia
    Supali T, Djuardi Y, Bradley M, Noordin R, Rückert P, Fischer PU
    PLoS Negl Trop Dis, 2013;7(12):e2586.
    PMID: 24349595 DOI: 10.1371/journal.pntd.0002586
    The lymphatic filarial parasite Brugia timori occurs only in eastern Indonesia where it causes high morbidity. The absence of an animal reservoir, the inefficient transmission by Anopheles mosquitoes and the high sensitivity to DEC/albendazole treatment make this species a prime candidate for elimination by mass drug administration (MDA).
    Matched MeSH terms: Filariasis/drug therapy*; Filariasis/epidemiology*
  10. Immunoglobulin levels in various clinical groups of human Brugian filariasis in Malaysia
    Sim BK, Mak JW, Kwa BH
    Z Parasitenkd, 1983;69(3):371-5.
    PMID: 6880344
    Quantitation of serum immunoglobulin M, G, A, D and E levels was carried out in Malaysians with Brugia malayi infections. Results showed highly elevated levels of IgM and IgE as well as moderately elevated levels of IgG. These were most significant in patients with tropical pulmonary eosinophilia or elephantiasis. Serum IgE levels were extremely high in microfilaraemic patients (6,060 +/- 3,958 IU ml) probably due to a constant antigenic stimulation by dead and dying microfilariae.
    Matched MeSH terms: Filariasis/diagnosis; Filariasis/immunology*
  11. Immigrant Health Study. 7. Foreign workers study: blood parasites. [Abstract]
    Khairul Anuar A, Rohela M, Zurainee MN, Abdul Aziz A, Sivanandan S
    JUMMEC, 1998;3:63-63.
    Lymphatic filariasis is endemic in Asia. The infections persist as a major cause of clinical morbidity and a significant impediment to socioeconomic development. Its prevalence is increasing world wide, largely because of rapid unplanned urbanization in many endemic areas. It is estimated that at least 120 million people are infected. In our study on foreign workers, a total of 241 day time blood samples were collected. The countries represented were Bangladesh (134), Indonesia (103), Pakistan (3) and Myanmar(1). The tests conducted on blood samples were thick blood film for microfilaria and thin blood film for malaria and quantitation of eosinophiles using the Giemsa stain. Out of the 241 blood samples tested, one was positive for Wuchereria bancrofti and one other was positive for malaria (Plasmodium falciparum) each from Bangladesh and Indonesia respectively. As for the blood eosinophiles, 39 (16.18%) blood samples showed high eosinophilia. Fifteen (6.22%) were from Banglandesh and 24 (9.96%) were from Indonesia. The Bangladeshi male who was positive for Witcherrria bamuofti also showed eosinophilia of 22%. We believe that some of these cases with high eosinophilia, may be positive for microfilaria. We may have missed some cases because of the methodology we chose. Lymphatic filariasis is endemic in Bangladesh and Indonesia. In Malaysia W. brancrofti, especially in the cities have been eliminated. However their vectors for the transmission of W. bancrofti is rampant in the cities. With the influx of immigrants with W. bancrofti and in relation to their occupational nature, W. bancrofti may eventually be introduced into the community and change the whole facet of the disease in Malaysia.
    Matched MeSH terms: Filariasis
  12. Immigrant Health Study. 6. Parasitic infection in foreign workers: serological findings. [Abstract]
    Zurainee MN, Khairul Anuar A, Khatijah O, Sri Suriati A, Noraishah S
    JUMMEC, 1998;3:63-63.
    We describe the results of serology for parasitic infection of 250 foreign workers who were seen at the University of Malaya Medical Centre, UMMC during 7-months period. The 250 foreign workers participated included 114 from Indonesia, 142 from Bangladesh, two from Myanmar and two from Pakistan. Blood samples were taken from these workers and eight tests (amoebiasis, echinococcosis, filariasis, leishmaniasis, malaria, schistosomiasis, toxoplasmosis, and trypanosomiasis) were performed on serum. Among the 250 sera tested, 92 (36.8%) were found to be positive for at least one parasitic infection. There was one case where the serum was found positive for 5 tests. The most common antibody detected in those positive sera was antibody for toxoplasma (80.%), followed by filaria (32.8%) and amoeba (30%). Other tests showed low percentage of infection with schistosomiasias, 10%; echinococcosis, 6% and malaria, 3.6%. None of the foreign workers were found positive for leishmaniasis or trypanosomiasias.
    Matched MeSH terms: Filariasis
  13. Human cases of filarial infection in West Malaysia
    Ponnampalam JT
    Med J Malaya, 1971 Sep;26(1):62-4.
    PMID: 4258579
    Matched MeSH terms: Filariasis/epidemiology*
  14. Homologs of the Brugia malayi diagnostic antigen BmR1 are present in other filarial parasites but induce different humoral immune responses
    Noordin R, Aziz RA, Ravindran B
    Filaria journal, 2004 Dec 31;3(1):10.
    PMID: 15627400
    BACKGROUND: The recombinant antigen BmR1 has been extensively employed in both ELISA and immunochromatographic rapid dipstick (Brugia Rapid) formats for the specific and sensitive detection of IgG4 antibodies against the lymphatic filarial parasites Brugia malayi and Brugia timori. In sera of individuals infected with Wuchereria bancrofti the IgG4 reactivity to BmR1 is variable, and cross-reactivity of sera from individuals infected with Onchocerca volvulus or Loa loa was observed only in single cases. In order to characterize the homologs of the BmR1 antigen in W. bancrofti (Wb-BmR1), O. volvulus (Ov-BmR1) and L. loa (Ll-BmR1) the cDNA sequences were identified, the protein expressed and the antibody reactivity of patients' sera was studied. METHODS: PCR methodology was used to identify the cDNA sequences from cDNA libraries and/or genomic DNA of W. bancrofti, O. volvulus and L. loa. The clones obtained were sequenced and compared to the cDNA sequence of BmR1. Ov-BmR1 and Ll-BmR1 were expressed in E. coli and tested using an IgG4-ELISA with 262 serum samples from individuals with or without B. malayi, W. bancrofti, O. volvulus and L. loa infections or various other parasitic infections. BmR1, Ov-BmR1 and Ll-BmR1 were also tested for reactivity with the other three IgG subclasses in patients' sera. RESULTS: Wb-BmR1 was found to be identical to BmR1. Ov-BmR1 and Ll-BmR1 were found to be identical to each other and share 99.7% homology with BmR1. The pattern of IgG4 recognition of all serum samples to BmR1, Ov-BmR1 and Ll-BmR1 were identical. This included weak IgG4 reactivities demonstrated by L. loa- and O. volvulus-infected patients tested with Ov-BmR1 and Ll-BmR1 (or BmR1). With respect to reactivity to other IgG subclasses, sera from O. volvulus- and L. loa-infected patients showed positive reactions (when tested with BmR1, Ov-BmR1 or Ll-BmR1 antigens) only with IgG1. No reactivity was observed with IgG2 or with IgG3. Similarly, ELISAs to detect reactivity to other anti-filarial IgG subclasses antibodies showed that sera from individuals infected with B. malayi or W. bancrofti (active infections as well as patients with chronic disease) were positive with BmR1 only for IgG1 and were negative when tested with IgG2 and with IgG3 subclasses. CONCLUSIONS: This study demonstrates that homologs of the BmR1 antigen are present in W. bancrofti, O. volvulus and L. loa and that these antigens are highly conserved. Recognition of this antigen by patients' sera is similar with regard to IgG1, IgG2 and IgG3, but different for IgG4 antibodies. We conclude that the BmR1 antigen is suitable for detection of IgG4 antibodies in brugian filariasis. However, its homologs are not suitable for IgG4-based diagnosis of other filarial infections.
    Matched MeSH terms: Filariasis
  15. Histopathology of Stephanofilaria kaeli lesions in cattle
    Loke YW, Ramachndran CP
    Med J Malaya, 1966 Jun;20(4):348.
    PMID: 4224358
    Matched MeSH terms: Filariasis/pathology*; Filariasis/veterinary*
  16. HLA and filariasis in Sri Lankans and Indians
    Chan SH, Dissanayake S, Mak JW, Ismail MM, Wee GB, Srinivasan N, et al.
    Southeast Asian J. Trop. Med. Public Health, 1984 Sep;15(3):281-6.
    PMID: 6523169
    Similar HLA association was found in patients with elephantiasis in Sri Lankans and Southern Indians. HLA-B15 was observed in 13/44 (30%) Sri Lankan patients with elephantiasis compared to 1/27 (4%) Sri Lankan controls (p = .0058; RR = 10.9) and in 5/8 (28%) Southern Indian elephantiasis compared to 10/101 (10%) Southern Indian controls (p = 0.04; RR = 3.5). In combining the data, the significance of the difference of the frequency of B15 between patients with elephantiasis and controls was even more marked (p = 0.00045; corrected p = 0.012; RR = 4.4).
    Matched MeSH terms: Filariasis/genetics*; Filariasis/immunology
  17. Further studies on malaria in Krain with a note on filariasis
    GRIFFITH DH, MAURER SP, CHOO LS
    Med J Malaya, 1957 Sep;12(1):348-72.
    PMID: 13492807
    Matched MeSH terms: Filariasis/epidemiology*
  18. Fulltext Filariasis of the axilla in a patient returning from travel abroad: a case report
    Roethlisberger M, Wuerstlein R, Majores M, Müller-Stöver I, Seitz HM, Rhiem K, et al.
    Breast care (Basel, Switzerland), 2012 Dec;7(6):487-9.
    PMID: 24715832 DOI: 10.1159/000345471
    BACKGROUND: The term filariasis comprises a group of parasitic infections caused by helminths belonging to different genera in the superfamily Filaroidea. The human parasites occur mainly in tropical and subtropical regions, but filariae are also found in temperate climates, where they can infect wild and domestic animals. Humans are rarely infected by these zoonotic parasites.

    PATIENTS AND METHODS: A 55-year-old patient presented with a new-onset, subcutaneous, non-tender palpable mass in the right axilla. Ultrasonography showed a 1.3-cm, solid, singular encapsulated node. Sonography of the breast on both sides, axilla and lymphatic drainage on the left side, lymphatic drainage on the right side, and mammography on both sides were without pathological findings. The node was excised under local anesthesia as the patient refused minimal invasive biopsy.

    RESULTS: On histopathological examination, the tail of a parasite of the group of filariae was found. The patient revealed that she had stayed in Africa and Malaysia for professional reasons. 6 months before the time of diagnosis, she had also suffered from a fever and poor general condition after a trip abroad. The patient was referred for further treatment to the Institute for Tropical Medicine at the University of Dusseldorf, where a treatment with ivermectin was conducted on the basis of positive staining with antibodies against filariae.

    CONCLUSION: Our case demonstrates the importance of interdisciplinary collaboration between breast center, pathology, and other specialties such as microbiology and tropical medicine.

    Matched MeSH terms: Filariasis
  19. Filariasis in a rubber plantation in Negeri Sembilan, West Malaysia
    Ramachandran CP, Dondero TJ, Mullin SW, Sivanandam S, Stevens S
    Med J Malaya, 1971 Jun;25(4):273-7.
    PMID: 4261299
    Matched MeSH terms: Filariasis/epidemiology*
  20. Filariasis in Singapore
    DANARAJ TJ, SCHACHER JF, COLLESS DH
    Med J Malaya, 1958 Jun;12(4):605-12.
    PMID: 13577153
    Matched MeSH terms: Filariasis/epidemiology*
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