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FA Sudjadi FA Sudjadi
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Filariasis caused by nonperiodic form of Brugia ma/ayi among transmigrants in East Kalimantan. FA Sudjadi FA Sudjadi
Journal of the Medical Sciences (Berkala Ilmu Kedokteran) Vol 30, No 02 (1998)
Publisher : Journal of the Medical Sciences (Berkala Ilmu Kedokteran)

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Abstract

A new subspecies of sylvanic or human filarial worm, i.e. nonperiodic form of Brugia malayi Lichtenstein, was recently discovered in East Kalimantan, which was highly prevalent among Dayak indigenous people living in the deep forest. This paper reports the filarial infections among transmigrants coming from Java who have been resettled for about 30 years in the UPT (unit of transmigration resettlement) of Petung, Penajam district, Pasir regency. Higher filarial infections were recorded among transmigrants living in hilly parts of the UPT, such as those found in Gunungrejo subvillage, with a micro-filarial rate of 6.3%, clinical rate of 8,1% or filariasis rate of 12,9%, out of 520 people examined. In more swampy areas, such as those found in Kedungrejo subvillage, the parasite Infection rate was much lower, and was recorded only 3,1%, out of 578 people examined. The result of blood or clinical examinations carried out in this research also indicated that male and older Inhabitants or transmigrants who have stayed longer in Kalimantan have a higher risk of Infection.Key words: transmigrants - Brugia malayi - nonperiodic form - sylvanic filaria - mansonia
FlOariasis caused by nonpedodic form of Brugia malayi among Bugis and Banjar settlers in East Kalimantan FA Sudjadi FA Sudjadi
Journal of the Medical Sciences (Berkala Ilmu Kedokteran) Vol 30, No 01 (1998)
Publisher : Journal of the Medical Sciences (Berkala Ilmu Kedokteran)

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Abstract

Nonperiodic form of B. malayi was recently discovered as a new infraspecific variant (new subspecies) of filarial parasite found among Dayak Indigenous people living scattered in deep forest of East Kalimantan. In this research, clinical or blood (including membrane filter concentration method) examinations were carried out on Bugis or Banjar tribais in kampongs or more open areas in East Kalimantan. The malayan filariasis infections were detected among them, but not in high prevalence nor microfilarial density, such as found in two villages in Mahakam delta or another one In Bontang area, Kutai regency. The clinical manifestations, however, were not severe nor specific.Key words: Brugia malayi - nonperiodic form - Bugis and Banjar settler - natural selection pressure - parasite dispersal.
Daytime transmission of filariasis caused by nonperiodic form of Brugia Malaya among Dayak indigenous inhabitants in East Kalimantan. FA Sudjadi FA Sudjadi
Journal of the Medical Sciences (Berkala Ilmu Kedokteran) Vol 29, No 04 (1997)
Publisher : Journal of the Medical Sciences (Berkala Ilmu Kedokteran)

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Abstract

In addition to the previously known of subperiodic and periodic form, the nonperiodic form of B. malayi Lichtenstein was recently reported from East Kalimantan as a new filarial different subspecies. The morphology or natural habitat of filarial parasite was recently described. This paper reports daytime transmission of the disease found in highly endemic area of Dayak, indigenous inhabitants of Krayan area, Long Ikis district, Pasir regency, East Kalimantan. To show such transmission, the microfilaria carrier was followed by daily activities at daytime. When the carrier was at work in the forest, the wild mosquitoes landing and feeding on him were collected, then reared in a laboratory until 14 days. The remains alive of mosquitoes were then morphologically identified and dissected. Infective larvae were recovered from 2 dissected mosquito species, Mansonia bonnae and Mansonia uniformis. Out of 131 alive mosquitoes dissected, 15 (consisting of 10 Ma.bonneae or 13,0% and 5 Ma. uniformis or 11,6%) were found infectious, from which 23 recovered and 11 filarial larvae respectively. Totally, 34 infective B.malayi larvae recovered: 24 larvae from the head and another 10 from the thorax.Key words: Brugia malayi - nonperiodic form - daytime transmission - Mansonia bonnae - Mansonia uniformis
Morfologi Brugia malayi nonperiodik penyebab filariasis di Kalimantan Timur FA Sudjadi FA Sudjadi
Journal of the Medical Sciences (Berkala Ilmu Kedokteran) Vol 28, No 02 (1996)
Publisher : Journal of the Medical Sciences (Berkala Ilmu Kedokteran)

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Abstract

Morphological observations were made on the adult filarial worms of nonperiodic form of B.malayi (32 worms), the new subspecies of the causative agent of filariasis in East Kalimantan (3,4). The filaria parasites were compared to the old subspecies of nocturnally subperiodic form of B.malayi (25 worms) from Kendari and the animal filaria of B.pahangi (20 worms) which were also sympatric in East Kalimantan. The adult filarial worms (originated from human/animal carrier) were available from dissection of artificially infected laboratory animal of Meriones unguiculatus. For the artificial infection, Aedes togoi Theobald mosquito were used as laboratory vector.The observations revealed a morphological gap, between B.malayi (nonperiodic form) and B.pahangi coexisting in East Kalimantan showed a reproductive isolation as a different species. Morphologically, the B.malayi from East Kalimantan should be put in the same species category with the nocturnally subperiodic form of B.malayi from Kendari. Showing more anthropo or zoophilic (cf 1,2) properties of parasite intraspecific variabilities in morphology, were also recorded from the filarial worms with an average of the nonperiodic form shorter than the nocturnally subperiodic form of B.malayi, but longer than the animal parasites of B.pahangi.Key words: B. malayi — morphological gap — reproductive isolation — morphological variabilities
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