Displaying publications 1 - 20 of 172 in total

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  1. Mak JW, Choong MF, Lam PL, Suresh K
    Acta Trop, 1990 May;47(4):223-6.
    PMID: 1973024
    The leaf-monkeys, Presbytis cristata and Presbytis melalophos, experimentally infected with subperiodic Brugia malayi, have been used for studies on the pathoimmunology of the infection and the screening of potential filaricides during the last 6-8 years, and considerable information on the pattern of microfilaraemia and adult worm recoveries have been obtained. The prepatent periods in 97 P. cristata and 45 P. melalophos, each infected with about 200 infective larvae, were similar, these being approximately 70 and 68 days respectively. Although all infected animals became microfilaraemic, the peak geometric mean count was much higher in P. cristata than in P. melalophos, this being 182.0 and 65.8 per ml blood respectively. Mean adult worm recovery expressed as the percentage of the infective dose was 4.7% and 2.5%, respectively. Most worms were recovered from the sacral nodes/thoracic duct or inguinal lymph nodes in these animals. In view of the higher worm recovery and the higher peak microfilaraemia attained, it is concluded that P. cristata is a better model for the infection than P. melalophos.
    Matched MeSH terms: Filariasis/parasitology*
  2. Mak JW, Cheong WH, Yen PK, Lim PK, Chan WC
    Acta Trop, 1982 Sep;39(3):237-45.
    PMID: 6128892
    The dynamics of the transmission of subperiodic Brugia malayi in a typical endemic area in Malaysia was studied over a period of 4 years. Mass chemotherapeutic control with diethylcarbamazine citrate was found to be inefficient, new cases being detected even after the fifth treatment cycle of 6 mg/kg X 6 days per cycle. This is in marked contrast to the situation in periodic b. malayi areas where mass treatment efficiently controlled the infection. The disparity in results in these two areas is attributed to zoonotic transmission of subperiodic B. malayi from non-human primates where a mean infection rate of 76.3% was found.
    Matched MeSH terms: Filariasis/epidemiology; Filariasis/prevention & control*; Filariasis/transmission
  3. 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
  4. Chiang GL, Samarawickrema WA, Eng KL, Cheong WH, Sulaiman I, Yap HH
    Ann Trop Med Parasitol, 1986 Apr;80(2):235-44.
    PMID: 2875691
    Surveillance methods for Coquillettidia crassipes were studied in an open housing estate near Kuala Lumpur using three types of traps Trinidad 10 trap, modified Lard can trap and IMR trap, each baited with chicken or pigeon. All traps attracted Cq. crassipes. There was no significant difference in the catches in the three traps. There was also no significant difference between chicken and pigeon as bait. Catches at heights of 1.5, 3, 4.5 and 6 m did not show any significant difference in density. Cq. crassipes was active at night with an early peak during the first hour of the night and a minor peak between 0100 and 0200 hours. The activity of the parous and nulliparous sections of the population was similar, except that a higher proportion of the parous females was active during the second peak compared with the nulliparous females. The parous rate was 22.3%, and the probability of survival through one day for two gonotrophic cycles was 0.711 and 0.650. The infection rate for Cardiofilaria was 29 out of 1052 (2.76%) and the infective rate (L3 larvae) was 13 out of 1052 (1.24%). 48.3% of the infected Cq. crassipes had a worm burden of more than ten larvae. One of the chickens in the traps was positive for microfilariae of Cardiofilaria four weeks after exposure as bait. Laboratory bred Cq. crassipes fed on this chicken produced infective larvae in ten days, and these were inoculated into clean chickens and pigeons. Microfilariae appeared in the chickens but not in pigeons. The adult worms recovered await identification.
    Matched MeSH terms: Filariasis/transmission
  5. Barclay R
    Ann Trop Med Parasitol, 1969 Dec;63(4):473-88.
    PMID: 4393668
    Matched MeSH terms: Filariasis/complications; Filariasis/epidemiology*
  6. LAING AB, EDESON JF, WHARTON RH
    Ann Trop Med Parasitol, 1960 Apr;54:92-9.
    PMID: 14413482
    Matched MeSH terms: Filariasis/transmission*
  7. LAING AB, EDESON JF, WHARTON RH
    Ann Trop Med Parasitol, 1961 Apr;55:86-92.
    PMID: 13758335
    Matched MeSH terms: Filariasis/transmission*
  8. EDESON JF
    Ann Trop Med Parasitol, 1959 Dec;53:388-93.
    PMID: 13819291
    Matched MeSH terms: Filariasis/diagnosis*
  9. WHARTON RH, LAING AB, CHEONG WH
    Ann Trop Med Parasitol, 1963 Jun;57:235-54.
    PMID: 14042655
    Matched MeSH terms: Filariasis*
  10. WHARTON RH, EDESON JF, WILSON T, REID JA
    Ann Trop Med Parasitol, 1958 Jul;52(2):191-205.
    PMID: 13559957
    Matched MeSH terms: Filariasis/prevention & control*
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