Displaying publications 41 - 60 of 72 in total

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  1. Purification and comparison of heat shock protein 90 (Hsp90) in Candida albicans isolates from Malaysian and Iranian patients and infected mice
    Khalili V, Shokri H, Khosravi AR, Akim A, Amri Saroukolaei S
    J Mycol Med, 2016 Jun;26(2):94-102.
    PMID: 26869383 DOI: 10.1016/j.mycmed.2015.12.007
    OBJECTIVE: The purposes of this study were to purify and compare the concentration ratios of heat shock protein 90 (Hsp90) in clinical isolates of Candida albicans (C. albicans) obtained from Malaysian and Iranian patients and infected mice.

    MATERIALS AND METHODS: Hsp90 was extracted using glass beads and ultracentrifugation from yeast cells and purified by ion exchange chromatography (DEAE-cellulose) and followed by affinity chromatography (hydroxyapatite). Purity of Hsp90 was controlled by SDS-PAGE and its identification was realized by immunoblotting test.

    RESULTS: The graphs of ion exchange and affinity chromatography showed one peak in all C. albicans isolates obtained from both Malaysian and Iranian samples, infected mice and under high-thermal (42°C) and low-thermal (25°C) shock. In immunoblotting, the location of Hsp90 fragments was obtained around 47, 75 and 82kDa. The least average concentration ratios of Hsp90 were 0.350 and 0.240mg/g for Malaysian and Iranian isolates at 25°C, respectively, while the highest average concentration ratios of Hsp90 were 3.05 and 2.600mg/g for Malaysian and Iranian isolates at 42°C, respectively. There were differences in the ratio amount of Hsp90 between Malaysian isolates (1.01±0.07mg/g) and mice kidneys (1.23±0.28mg/g) as well as between Iranian isolates (0.70±0.19mg/g) and mice kidneys (1.00±0.28mg/g) (P<0.05).

    CONCLUSION: The results showed differences in all situations tested including Iranian and Malaysian isolates, samples treated with temperatures (25°C or 42°C) and before and after infecting the mice (37°C), indicating higher virulent nature of this yeast species in high temperature in human and animal models.

    Matched MeSH terms: Rodent Diseases/metabolism; Rodent Diseases/microbiology
  2. Fulltext Ectoparasite fauna of rodents and shrews from four habitats in Kuala Lumpur and the states of Selangor and Negeri Sembilan, Malaysia and its public health significance
    Paramasvaran S, Sani RA, Hassan L, Krishnasamy M, Jeffery J, Oothuman P, et al.
    Trop Biomed, 2009 Dec;26(3):303-11.
    PMID: 20237444 MyJurnal
    A total of 204 rodents comprising 14 host species from four different habitats were examined. Nine rodent species were trapped from the forest and another five species were trapped from the coastal, rice field and urban habitats. Rattus rattus diardii (67%) was the predominant rodent species examined. Fifty six (47.3%) rodents and shrews were found to be infested with at least one of the 20 species of ectoparasite recovered. Mites belonging to the family Trombiculidae were the predominant ectoparasite species recovered. Ticks belonging to the family Ixodidae were recovered mainly from the forest dwelling rodents. Polyplax spinulosa and Hoplopleura pacifica were the common lice species found infesting the urban rodents. Xenopsylla cheopis was the only flea species recovered. The following ecto-parasites have been incriminated as important vectors or as mechanical carriers for the transmission of zoonotic diseases: Ixodes granulatus, Dermacentor sp. Haemaphysalis sp., Amblyomma sp. Ascoschoengastia indica, Leptotrombidium deliense, Ornithonyssus bacoti, Laelaps nuttalli, H. pacifica, P. spinulosa and Xenopsylla cheopis. Urban and forest rodents were significantly higher in ecto-parasitic infestation, compared to rats from the other two habitats. However, there was no significant statistical association between male and female rodents infested with ectoparasites.
    Matched MeSH terms: Rodent Diseases/epidemiology*; Rodent Diseases/parasitology
  3. Fulltext A preliminary survey of ectoparasites of small mammals in Kuala Selangor Nature Park
    Chuluun B, Mariana A, Ho T, Mohd Kulaimi B
    Trop Biomed, 2005 Dec;22(2):243-7.
    PMID: 16883294 MyJurnal
    Trapping of small mammals was conducted at 5 study sites in Kuala Selangor Nature Park (KSNP) from 20-24 June 2005. A total of 11 animals comprising 2 species of rodents, Maxomys whiteheadi and Rattus exulans were caught from 3 sites, i.e from an area of mixed secondary forest and mangrove swamp; an area of mangrove swamp, and from an area of lalang fringing mangrove swamp. From these animals, the following 7 species of ectoparasites were found: Laelaps echidninus, Laelaps nuttalli, Ascoschoengastia indica, Leptotrombidium deliense, Hoplopleura pectinata, Hoplopleura pacifica and Polyplax spinulosa. One of the ectoparasites found, L. deliense is a known vector of scrub typhus and thus may pose potential health risks to visitors to KSNP.
    Matched MeSH terms: Rodent Diseases/epidemiology*; Rodent Diseases/parasitology*
  4. Cytochrome c oxidase subunit I haplotype diversity of Angiostrongylus cantonensis (Nematoda: Angiostrongylidae)
    Eamsobhana P, Song SL, Yong HS, Prasartvit A, Boonyong S, Tungtrongchitr A
    Acta Trop, 2017 Jul;171:141-145.
    PMID: 28347653 DOI: 10.1016/j.actatropica.2017.03.020
    The rat lungworm Angiostrongylus cantonensis is a food-borne zoonotic parasite of public health importance worldwide. It is the primary etiologic agent of eosinophilic meningitis and eosinophilic meningoencephalitis in humans in many countries. It is highly endemic in Thailand especially in the northeast region. In this study, A. cantonensis adult worms recovered from the lungs of wild rats in different geographical regions/provinces in Thailand were used to determine their haplotype by means of the mitochondrial partial cytochrome c oxidase subunit I (COI) gene sequence. The results revealed three additional COI haplotypes of A. cantonensis. The geographical isolates of A. cantonensis from Thailand and other countries formed a monophyletic clade distinct from the closely related A. malaysiensis. In the present study, distinct haplotypes were identified in seven regions of Thailand - AC10 in Phitsanulok (northern region), AC11 in Nakhon Phanom (northeastern region), AC15 in Trat (eastern region), AC16 in Chantaburi (eastern region), AC4 in Samut Prakan (central region), AC14 in Kanchanaburi (western region), and AC13 in Ranong (southern region). Phylogenetic analysis revealed that these haplotypes formed distinct lineages. In general, the COI sequences did not differentiate the worldwide geographical isolates of A. cantonensis. This study has further confirmed the presence of COI haplotype diversity in various geographical isolates of A. cantonensis. The COI gene sequence will be a suitable marker for studying population structure, phylogeography and genetic diversity of the rat lungworm.
    Matched MeSH terms: Rodent Diseases/epidemiology; Rodent Diseases/parasitology*
  5. The occurrence of Salmonellae in house shrews and rats in Ipoh, Malaysia
    Joseph PG, Yee HT, Sivanandan SP
    Southeast Asian J Trop Med Public Health, 1984 Sep;15(3):326-30.
    PMID: 6523172
    House shrews (Suncus murinus) and rats (Rattus rattus diardii), trapped during a survey period from July 1978 to December 1979 and thereafter on a random basis, from residences within and outside the Veterinary Research Institute, Ipoh, Malaysia campus, were bacteriologically examined for the presence of salmonellae. Of the 55 shrews and 8 rats examined, 39 (71%) shrews and 2 (25%) rats were found positive. There were 46 Salmonella isolates which included 5 dual infections. These were serotyped as S. weltevreden, S. bareilly, S. stanley, S. augustenborg, S. hvittingfoss, S. emek, S. paratyphi B, S. ohio and S. matopeni in order of frequency of isolation. The significance of these findings especially with regard to salmonellosis in man and animals is discussed.
    Matched MeSH terms: Rodent Diseases/microbiology; Rodent Diseases/epidemiology*
  6. Taxonomic revision of the Nippostrongylinae (Nematoda, Heligmonellidae) arasitic in Oriental Muridae. The genus Paraheligmonelloides Fukumoto, Kamiya & Suzuki, 1980
    Digiani MC, Durette-Desset MC
    Zootaxa, 2014;3884(1):81-8.
    PMID: 25543768 DOI: 10.11646/zootaxa.3884.1.7
    The genus Paraheligmonelloides Fukumoto, Kamiya and Suzuki, 1980 (Nippostrongylinae) is revised and split into four genera, mainly based on characters of the synlophe not previously considered at the supraspecific level. These characters mainly include the homology of the left ridge with ridge 1', the relative size of the right ridge to the left ridge and to ridge 1' and the distribution of the largest ridges. Paraheligmonelloides sensu stricto, characterized by the homology of the left ridge with ridge 1', contains only the type species, Paraheligmonelloides kenyensis Fukumoto, Kamiya and Suzuki, 1980, parasitic in a lagomorph from Kenya. Krishnasamyos n. gen., characterized by ridge 1' forming a comarete, two minute left ventral ridges and ridge 1 larger than other dorsal ridges, only includes the species Krishnasamyos triangulus n. comb., parasitic in Malaysian murids. Hughjonestrongylus n. gen., characterized by numerous ridges markedly unequal in size, with the largest ridges grouped in relation to the lateral fields, includes Hughjonestrongylus ennisae n. comb., Hughjonestrongylus amplicaudae n. comb., Hughjonestrongylus mirzai n. comb., and Hughjonestrongylus singauwaensis n. comb., all parasitic in murids from Papua Indonesia and Papua New Guinea. Syafruddinema n. gen., characterized by ridge 1 as long as other dorsal ridges and a gap associated with the left lateral field, between ridges 2' and 3', includes Syafruddinema paruromyos n. comb., Syafruddinema annandalei n. comb., and Syafruddinema eropeplios n. comb., parasitic in murids from Malaysia and Indonesia. A key to the proposed genera is provided.
    Matched MeSH terms: Rodent Diseases
  7. Breinlia booliati sp. n. (Filaroidea: Onchocercidae), a filaria of the Malayan forest rat, Rattus sabanus (Thos.)
    Singh M, Ho BC
    J Helminthol, 1973;47(2):127-33.
    PMID: 4724312
    Matched MeSH terms: Rodent Diseases
  8. [Three new species of the genus Medwayella Traub, 1972 (Insecta: Siphonaptera: Pygiopsyllidae) from Sabah (eastern Malaysia, Borneo)]
    Beaucournu JC, Wells K
    Parasite, 2004 Dec;11(4):373-7.
    PMID: 15638138
    Medwayella traubiana n. sp., M. pfeifferi n. sp. and M. sabahae n. sp. (Pygiopsyllidae) are described from Sabah (north of Borneo island), the first two on Tupaia tana (Scandentia), the last on Sundasciurus lowii (Rodentia). Sex male is only identified, because these fleas have been collected in sympatry, or even in syntopy. Their determination is based on segment IX and aedeagus. If M. traubiana and M. pfeifferi are related to some known species, M. sabahae is clearly distinct from other Medwayella.
    Matched MeSH terms: Rodent Diseases/parasitology*
  9. Fulltext Ectoparasites of murids in peninsular Malaysia and their associated diseases
    Mohd Zain SN, Amdan SA, Braima KA, Abdul-Aziz NM, Wilson JJ, Sithambaran P, et al.
    Parasit Vectors, 2015;8:254.
    PMID: 25924677 DOI: 10.1186/s13071-015-0850-1
    A considerable number of rat-borne ectoparasite studies have been conducted since the early 1930s in the Malayan Peninsula (now known as peninsular Malaysia). The majority of studies were field surveys and collections of specimens across the region, and were conducted primarily to catalogue the ectoparasite host distribution and discover novel species. This has generated a signification amount of information, particularly on the diversity and host distribution; other aspects such as morphology, host distribution and medical significance have also been investigated. Amongst the four main groups (mites, fleas, ticks, lice), rat-borne mites have received the most attention with a particular emphasis on chiggers, due to their medical importance. More recent studies have examined the distribution of ectoparasites in rats from different habitat type simplicating a high prevalence of zoonotic species infesting rat populations. Despite being capable of transmitting dangerous pathogens to human, the health risks of rat-borne ectoparasites appear to be small with no serious outbreaks of diseases recorded. Although an extensive number of works have been published, there remain gaps in knowledge that need to be addressed, such as, the distribution of under studied ectoparasite groups (listrophorids and myobiids), determining factors influencing infestation, and understanding changes to the population distribution over time.
    Matched MeSH terms: Rodent Diseases/parasitology*
  10. Group A rotavirus infection in animals from an animal house and in wild-caught monkeys
    Awang A, Yap K
    J Diarrhoeal Dis Res, 1990 Sep;8(3):82-6.
    PMID: 2122998
    Randomly selected samples from different animal colonies from two laboratory animal houses and from the wild-caught monkeys were tested for the presence of anti-rotavirus antibodies to estimate the rates of infection with group A rotavirus. Antibodies to the common group A rotaviral antigen were detected by a competitive enzyme-linked immunosorbent assay (ELISA) using reagents of WHO ELISA rotavirus detection kit. The results of the study showed that white mice, albino rats, and guinea pigs from long-established breeding colonies and resident house rats and house shrews from the animal house had no serological evidence of rotaviral infection. In contrast, one mousedeer from a colony of 19 animals and most of the rabbits from two separate breeding colonies at the same animal house were serologically positive for the infection. Also a significant number of the same species of monkey kept in captivity were found to acquire the infection. Leaf monkeys had no serological evidence of rotaviral infection. The infection rate in wild cynomolgus monkeys did not seem to be influenced by the different ecological environments of their respective habitats. The rate of infection in adults and juveniles was similar.
    Matched MeSH terms: Rodent Diseases/epidemiology*
  11. Distribution of Leptotrombidium (Leptotrombidium) arenicola (Acarina: Trombiculidae) on the ground in West Malaysia
    Upham RW, Hubert AA, Phang OW, Mat YB, Rapmund G
    J Med Entomol, 1971 Oct 30;8(4):401-6.
    PMID: 5159254
    Matched MeSH terms: Rodent Diseases/epidemiology
  12. Developmental and morphological characteristics of Taenia taeniaeformis (Batsch, 1786) in Clethrionomys rufocanus bedfordiae and Rattus norvegicus from different geographical locations
    Iwaki T, Nonaka N, Okamoto M, Oku Y, Kamiya M
    J Parasitol, 1994 Jun;80(3):461-7.
    PMID: 8195949
    Developmental and morphological characteristics of 3 isolates of Taenia taeniaeformis isolated from Clethrionomys rufocanus bedfordiae in Abuta (70 km southwest of Sapporo), Japan (isolate ACR), and from Rattus norvegicus in Sapporo, Japan (isolate SRN) and Kuala Lumpur, Malaysia (isolate KRN) were compared. Eggs of 3 isolates were administered to several species of rodents. Isolate ACR infected C. rufocanus bedfordiae, Apodemus speciosus, and Apodemus argenteus, but not rats or mice, whereas isolate SRN and isolate KRN were infective to rats, mice, A. speciosus, and A. argenteus, but not to C. rufocanus bedfordiae. The increase in cyst size of isolate ACR continued during the experimental period, whereas that of the other 2 isolates had ceased growing after 30 days postinfection. However, significant differences were observed in the length of the small rostellar hooks, number and distribution of testes, and the length of the cirrus sac between isolate ACR and the other 2 isolates. Thus it is suggested that isolate ACR is a distinct strain or even a new species.
    Matched MeSH terms: Rodent Diseases/parasitology*
  13. Observations of Breinlia booliati in a new host, Rattus rattus jalorensis, from Kuantan, state of Pahang, Malaysia
    Tucker MS, Price DL, Kwa BH, DeBaldo AC
    J Parasitol, 2003 Dec;89(6):1220-6.
    PMID: 14740913
    Breinlia booliati Singh and Ho, 1973 is described from the Malaysian wood rat, Rattus rattus jalorensis Bonhote. The parasites presented here were originally discovered in 1955 in Kuantan, Malaysia, but were not classified until now. On the basis of morphological observations of anatomical structures and comparisons with other species of Breinlia, it was determined that the parasites were B. booliati. The parasites discussed here show slight deviation from B. booliati, but they do not warrant a new species classification. There is some variation in anatomical measurements, the number of male caudal papillae, and the morphology of the microfilariae. Breinlia booliati from a new host is described in this article, with a brief discussion on Rattus species that are hosts of B. booliati and vectors that transmit the parasite. The occurrence of B. booliati in R. r. jalorensis represents the first report of the parasite in this host.
    Matched MeSH terms: Rodent Diseases/parasitology*
  14. Fulltext The flea genus Sigmactenus (Siphonaptera: Leptopsyllidae): three new taxa from Sulawesi, updated identification key, and distribution map for all known species and subspecies
    Durden LA, Beaucournu JC
    Parasite, 2000 Sep;7(3):151-65.
    PMID: 11031750 DOI: 10.1051/parasite/2000073151
    One new species and two new subspecies of fleas are described. These are S. sulawesiensis n. sp. from North and Central Sulawesi, S. alticola pilosus n. ssp. from Central Sulawesi, and S. alticola crassinavis n. ssp. from North Sulawesi. All three of these new taxa are ectoparasites of native, endemic murine rodents. Two of the new taxa, S. sulawesiensis and S. alticola crassinavis, coexist on the same mountain, Gunung Moajat, in North Sulawesi. The related S. alticola alticola, which becomes the nominate subspecies, parasitises the murine rodent Maxomys alticola in northern Borneo (Sabah) and it is hypothesized that Sigmactenus first colonized Sulawesi as an ectoparasite of ancestral Maxomys, or perhaps Rattus, as these murines dispersed from southeast Asia to Sulawesi; 15 endemic murine rodent species belonging to these two genera are known to currently inhabit Sulawesi. An identification key and distribution map are included for all known species and subspecies of Sigmactenus. In addition to the three new taxa and S. a. alticola, these include: S. celebensis from South Sulawesi, S. timorensis from Timor, S. toxopeusi from New Guinea, and S. werneri from the Philippines (Mindanao and Negros).
    Matched MeSH terms: Rodent Diseases/parasitology*
  15. New species of Eimeria (Protozoa: Eimeriidae) from Malaysian squirrels
    Colley FC, Mullin SW
    J. Protozool., 1971 Aug;18(3):400-2.
    PMID: 5167227
    Matched MeSH terms: Rodent Diseases/epidemiology
  16. Distribution, relative abundance, food habits, and parasite patterns of giant rats (Rattus) in West Malaysia
    Lim BL
    J Mammal, 1970 Nov;51(4):730-40.
    PMID: 5530310
    Matched MeSH terms: Rodent Diseases/epidemiology*
  17. Studies on the Malayan forest rat filaria, Breinlia booliati: periodicity and microfilaraemic patterns during the course of infection
    Yap EH, Ho BC, Singh M, Kang KL, Lim BL
    J Helminthol, 1975 Dec;49(4):263-9.
    PMID: 1206216
    Breinlia booliati exhibited nocturnal subperiodicity in its natural host, Rattus sabanus in contrast to experimentally infected laboratory-reared albine rats which showed irregular fluctuations of microfilariae throughout the 24 hour cycle. All the infected albino rats showed a prepatent period between 11-14 weeks postinoculation. Three patterns of microfilaraemia were discerned during the course of infection 38/49 rats displayed a single peak, 4/49 displayed 2 peaks about 12-15 weeks apart and 7/49 showed a sustained high plateau-like pattern of microfilaraemia. Cortisone had no effect on microfilarial levels when administered to rats near postpatency and some at postpatency.
    Matched MeSH terms: Rodent Diseases/parasitology*
  18. Studies on the nematode parasites of Malaysian rodents. I. The Rhabdiasidea, Trichuridea and Oxyuridea
    Ow-Yang CK
    J Helminthol, 1971;45(2):93-109.
    PMID: 5123705
    Matched MeSH terms: Rodent Diseases*
  19. Angiostrongylus malaysiensis from Tuaran, Sabah, with reference to the distribution of the parasite in Malaysia
    Liat LB, Wah LT, Cheah W, Cheah W, Fong YL, Fong YL
    Southeast Asian J Trop Med Public Health, 1976 Sep;7(3):384-9.
    PMID: 1030843
    A survey of Angiostrongylus malaysiensis among wild rodent and molluscan hosts was made in the Tuaran Central Agricultural Research Station and within the vicinity of Tuaran, Sabah. Three of 19 Rattus rattus diardii, one of 2 R. exulans and one R. argentiventer were found naturally infected with the parasite. In this survey 56 of 382 molluscs comprising of Pila scutata, Achatina fulica and two species of land slugs, Laevicaulis alte and Microparmarion malayanus, were found naturally infected with the parasite. Samples of larvae from each of these molluscs were experimentally transferred to laboratory albino rats and adult worms consistent with A. malaysiensis were recovered. Comparison of the rat hosts and the molluscan intermediate hosts of the parasite in Peninsular Malaysia, Sarawak and Sabah was made, and the finding of A. malaysiensis in Tuaran is the first report of the parasite from Sabah. The distribution of the parasite throughout Malaysia is discussed. Observation on the human consumption of the freshwater snail, P. scutata, was made. Although the infection rate of this snail is low compared with other molluscan hosts examined. The importance of this mollusc as a potential source of human infection should not be overlooked. Hospital records for 1974 and 1975 were examined and clinical human angiostrongyliasis was rarely recorded in Sabah.
    Matched MeSH terms: Rodent Diseases/epidemiology
  20. Distribution and ecological consideration of Breinlia booliati infecting wild rodents in Malaysia
    Liat LB, Wah MJ, Singh M, Ho BC, Hian YE
    Southeast Asian J Trop Med Public Health, 1975 Jun;6(2):241-6.
    PMID: 1166352
    Seven of the 18 species of lowland forest terrestrial and semi-arboreal murids were found naturally infected with Breinlia booliati. Of these, two species, Rattus sabanus and R. cremoriventer, were found to be the most preferred hosts. None of the murids from the highland, field or human-inhabited areas was infected. This could have been due more to the greater scarcity of the vectors in these habitats than to the susceptibility of the hosts. The absence of this parasite in the squirrels examined may be attributed either to host specificity or to the normal activity cycles or vertical stratification of the vectors, separating them in space and/or time from the squirrels. The pattern of dispersion of the parasite is influenced by the wide distribution of suitable hosts, and the hypothesis that the parasite is of forest origin is discussed.
    Matched MeSH terms: Rodent Diseases/parasitology*
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