Displaying publications 1 - 20 of 91 in total

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  1. Inhumane death?
    Kestel A
    Science, 1999 May 7;284(5416):913.
    PMID: 10357670
    Matched MeSH terms: Swine Diseases/transmission; Swine Diseases/virology*
  2. Acari community in association with delayed pig carrion decomposition
    Heo CC, Teel PD, OConnor BM, Tomberlin JK
    Exp Appl Acarol, 2021 Dec;85(2-4):223-246.
    PMID: 34762225 DOI: 10.1007/s10493-021-00676-6
    Acari community structure and function associated with delayed pig carrion decomposition has not been examined. In this study, 18 swine carcasses were studied in central Texas, USA, during two consecutive summers (2013 and 2014). Samples of ca. 400 g soil were collected from beneath, aside, and 5 m away from each pig carcass over 180 days. Mites from soil samples were extracted using Berlese funnels and identified to order and family levels and classified according to ecological function. In total 1565 and 1740 mites were identified from the 2013 and 2014 soil samples, respectively. Significant differences were determined for mite community structure at order and family levels temporally on carrion (e.g., day 0 × day 14) regardless of treatments and between soil regions where mites were collected (e.g., soil beneath vs. soil 5 m away from carrion). However, no significant differences were found in mite community structure at the order level between pig carrion with and without delayed Diptera colonization (i.e., treatments). Analysis at the family level determined a significant difference across treatments for both summers. Ecological function of mites did not change significantly following the delayed decomposition of pig carcasses. However, detritivores and fungivores were significant indicator groups during the pig carrion decomposition process. Furthermore, 13 phoretic mite species associated with eight forensically important beetle species were documented. Data from this study indicated that the rate of nutrient flow into the soil impacted associated arthropod communities; however, detecting such shifts depends on the taxonomic resolution being applied.
    Matched MeSH terms: Swine Diseases*
  3. Nipah virus infection of pigs in peninsular Malaysia
    Mohd Nor MN, Gan CH, Ong BL
    Rev. - Off. Int. Epizoot., 2000 Apr;19(1):160-5.
    PMID: 11189713
    Between late 1998 and 1999, the spread of a new disease of pigs, characterized by a pronounced respiratory and neurological syndrome, sometimes accompanied by the sudden death of sows and boars, was recorded in pig farms in peninsular Malaysia. The disease appeared to have a close association with an epidemic of viral encephalitis among workers on pig farms. A previously unrecognised paramyxovirus was later identified from this outbreak; this virus was related to, but distinct from, the Hendra virus discovered in Australia in 1994. The new virus was named 'Nipah' and was confirmed by molecular characterization to be the agent responsible for the disease in both humans and pigs. The name proposed for the new pig disease was 'porcine respiratory and neurological syndrome' (also known as 'porcine respiratory and encephalitis syndrome'), or, in peninsular Malaysia, 'barking pig syndrome'. The authors describe the new disease and provide the epidemiological findings recorded among infected pigs. In addition, the control programmes which were instituted to contain the virus in the national swine herd are outlined.
    Matched MeSH terms: Swine Diseases/epidemiology*; Swine Diseases/prevention & control; Swine Diseases/virology
  4. Fulltext New virus is identified in Malaysia epidemic
    Easton A
    BMJ, 1999 May 08;318(7193):1232.
    PMID: 10231244
    Matched MeSH terms: Swine Diseases/epidemiology; Swine Diseases/transmission; Swine Diseases/virology
  5. Menangle and Nipah virus infections of pigs
    Kirkland PD, Daniels PW, Nor MN, Love RJ, Philbey AW, Ross AD
    Vet. Clin. North Am. Food Anim. Pract., 2002 Nov;18(3):557-71, ix.
    PMID: 12442583
    Viruses belonging to the family Paramyxoviridae generally have not been recognized as a significant cause of disease in pigs until recently. Between 1997 and 1999, there were large outbreaks of disease in pigs in Australia and Malaysia due to infection with viruses that have been shown to be new members of the Paramyxoviridae family. This article reviews current knowledge of Menangle and Nipah virus infections in pigs, the only major species of domestic animals to experience serious disease after infection with these viruses.
    Matched MeSH terms: Swine Diseases/diagnosis; Swine Diseases/epidemiology*; Swine Diseases/prevention & control*
  6. Is targeted removal a suitable means for tuberculosis control in wild boar?
    Che'Amat A, Armenteros JA, González-Barrio D, Lima JF, Díez-Delgado I, Barasona JA, et al.
    Prev Vet Med, 2016 Dec 01;135:132-135.
    PMID: 27843020 DOI: 10.1016/j.prevetmed.2016.11.002
    We assessed the suitability of targeted removal as a means for tuberculosis (TB) control on an intensely managed Eurasian wild boar (Sus scrofa) hunting estate. The 60km(2) large study area included one capture (treatment) site, one control site, and one release site. Each site was fenced. In the summers of 2012, 2013 and 2014, 929 wild boar were live-captured on the treatment site. All wild boar were micro-chipped and tested using an animal side lateral flow test immediately after capture in order to detect antibodies to the Mycobacterium tuberculosis complex (MTC). The wild boar were released according to their TB status: Seropositive individuals onto the release site (hunted after summer), and seronegative individuals back onto the treatment site. The annual summer seroprevalence of antibodies to the MTC declined significantly in live-captured wild boar piglets from the treatment site, from 44% in 2012 to 27% in 2013 (a reduction of 39%). However, no significant further reduction was recorded in 2014, during the third capture season. Fall-winter MTC infection prevalence was calculated on the basis of the culture results obtained for hunter-harvested wild boar. No significant changes between hunting seasons were recorded on either the treatment site or the control site, and prevalence trends over time were similar on both sites. The fall-winter MTC infection prevalence on the release site increased significantly from 40% in 2011-2012 to 64% in 2012-2013 and 2013-2014 (60% increase). Recaptures indicated a persistently high infection pressure. This experiment, the first attempt to control TB in wild boar through targeted removal, failed to reduce TB prevalence when compared to the control site. However, it generated valuable knowledge on infection pressure and on the consequences of translocating TB-infected wild boar.
    Matched MeSH terms: Swine Diseases/microbiology; Swine Diseases/epidemiology; Swine Diseases/prevention & control*
  7. Sparking attention on African swine fever research on social media platform: An altmetric evaluation of top 100 highly cited articles
    Basumatary B, Yunus MN, Verma MK
    Res Vet Sci, 2023 May;158:26-33.
    PMID: 36898955 DOI: 10.1016/j.rvsc.2023.02.010
    African swine fever (ASF) is one of the highly contagious diseases of pigs that affect both domestic and wild pigs. The primary purpose of this research was to evaluate the online social attention on the ASF research to inform the research scientists and key stakeholders in the field by reporting the concise information of the most influential articles, social engagement, and impacts of the research. This study employed the altmetrics tool to evaluate the research papers. Bibliographic data of 100 articles were collected from Scopus; altmetric data was collected from the Altmetric.com database and analyzed using SPSS and Tableau. The articles were mainly mentioned on Twitter, followed by News Outlets and significant readers on Mendeley. Pearson correlation coefficients revealed a weak and insignificant correlation between Scopus Citation and Altmetric Attention Score (AAS). Mendeley Readership and Scopus Citation were moderately correlated. However, there was a significant positive correlation between the AAS and Mendeley readership. Using altmetric tools, the paper is the first research to shed light on the characteristics of ASF on social media.
    Matched MeSH terms: Swine Diseases*
  8. Fulltext Surveillance for respiratory and diarrheal pathogens at the human-pig interface in Sarawak, Malaysia
    Borkenhagen LK, Mallinson KA, Tsao RW, Ha SJ, Lim WH, Toh TH, et al.
    PLoS One, 2018;13(7):e0201295.
    PMID: 30052648 DOI: 10.1371/journal.pone.0201295
    BACKGROUND: The large livestock operations and dense human population of Southeast Asia are considered a hot-spot for emerging viruses.

    OBJECTIVES: To determine if the pathogens adenovirus (ADV), coronavirus (CoV), encephalomyocarditis virus (EMCV), enterovirus (EV), influenza A-D (IAV, IBV, ICV, and IDV), porcine circovirus 2 (PCV2), and porcine rotaviruses A and C (RVA and RVC), are aerosolized at the animal-interface, and if humans working in these environments are carrying these viruses in their nasal airways.

    STUDY: This cross-sectional study took place in Sarawak, Malaysia among 11 pig farms, 2 abattoirs, and 3 animal markets in June and July of 2017. Pig feces, pig oral secretions, bioaerosols, and worker nasal wash samples were collected and analyzed via rPCR and rRT-PCR for respiratory and diarrheal viruses.

    RESULTS: In all, 55 pig fecal, 49 pig oral or water, 45 bioaerosol, and 78 worker nasal wash samples were collected across 16 sites. PCV2 was detected in 21 pig fecal, 43 pig oral or water, 3 bioaerosol, and 4 worker nasal wash samples. In addition, one or more bioaerosol or pig samples were positive for EV, IAV, and RVC, and one or more worker samples were positive for ADV, CoV, IBV, and IDV.

    CONCLUSIONS: This study demonstrates that nucleic acids from a number of targeted viruses were present in pig oral secretions and pig fecal samples, and that several viruses were detected in bioaerosol samples or in the nasal passages of humans with occupational exposure to pigs. These results demonstrate the need for future research in strengthening viral surveillance at the human-animal interface, specifically through expanded bioaerosol sampling efforts and a seroepidemiological study of individuals with exposure to pigs in this region for PCV2 infection.

    Matched MeSH terms: Swine Diseases/virology*
  9. The pandemic potential of Nipah virus
    Luby SP
    Antiviral Res, 2013 Oct;100(1):38-43.
    PMID: 23911335 DOI: 10.1016/j.antiviral.2013.07.011
    Nipah virus, a paramyxovirus whose wildlife reservoir is Pteropus bats, was first discovered in a large outbreak of acute encephalitis in Malaysia in 1998 among persons who had contact with sick pigs. Apparently, one or more pigs was infected from bats, and the virus then spread efficiently from pig to pig, then from pigs to people. Nipah virus outbreaks have been recognized nearly every year in Bangladesh since 2001 and occasionally in neighboring India. Outbreaks in Bangladesh and India have been characterized by frequent person-to-person transmission and the death of over 70% of infected people. Characteristics of Nipah virus that increase its risk of becoming a global pandemic include: humans are already susceptible; many strains are capable of limited person-to-person transmission; as an RNA virus, it has an exceptionally high rate of mutation: and that if a human-adapted strain were to infect communities in South Asia, high population densities and global interconnectedness would rapidly spread the infection. Appropriate steps to estimate and manage this risk include studies to explore the molecular and genetic basis of respiratory transmission of henipaviruses, improved surveillance for human infections, support from high-income countries to reduce the risk of person-to-person transmission of infectious agents in low-income health care settings, and consideration of vaccination in communities at ongoing risk of exposure to the secretions and excretions of Pteropus bats.
    Matched MeSH terms: Swine Diseases/epidemiology; Swine Diseases/transmission; Swine Diseases/virology*
  10. Fulltext Risk factors, prevention and communication strategy during Nipah virus outbreak in Malaysia
    Chua KB
    Malays J Pathol, 2010 Dec;32(2):75-80.
    PMID: 21329177 MyJurnal
    An outbreak of acute febrile encephalitis affecting pig-farm workers and owners was recognized in peninsular Malaysia as early as September 1998. The outbreak was initially thought to be due to Japanese encephalitis (JE) virus and thus very intensive prevention, control and communication strategies directed at JE virus were undertaken by the Ministry of Health and Ministry of Agriculture of Malaysia. There was an immediate change in the prevention, control and communication strategies with focus and strategies on infected pigs as the source of infections for humans and other animals following the discovery of Nipah virus. Information and understanding the risks of Nipah virus infections and modes of transmission strengthened the directions of prevention, control and communication strategies. A number of epidemiological surveillances and field investigations which were broadly divided into 3 groups covering human health sector, animal health sector and reservoir hosts were carried out as forms of risk assessment to determine and assess the factors and degree of risk of infections by the virus. Data showed that there was significant association between Nipah virus infection and performing activities involving close contact with pigs, such as processing of piglets, administering injection or medication to pigs, assisting in the birth of piglets, assisting in pig breeding, and handling of dead pigs in the affected farms. A complex process of anthropogenic driven deforestation, climatic changes brought on by El Niño-related drought, forest fire and severe haze, and ecological factors of mixed agro-pig farming practices and design of pig-sties led to the spillovers of the virus from its wildlife reservoir into pig population.
    Matched MeSH terms: Swine Diseases/epidemiology; Swine Diseases/prevention & control*; Swine Diseases/virology
  11. Fulltext Epidemiology, surveillance and control of Nipah virus infections in Malaysia
    Chua KB
    Malays J Pathol, 2010 Dec;32(2):69-73.
    PMID: 21329176 MyJurnal
    The outbreak of Nipah virus, affecting pigs and pig-farm workers, was first noted in September 1998 in the north-western part of peninsular Malaysia. By March 1999, the outbreak had spread to other pig-farming areas of the country, inclusive of the neighbouring country, Singapore. A total of 283 human cases of viral encephalitis with 109 deaths were recorded in Malaysia from 29 September 1998 to December 1999. During the outbreak period, a number of surveillances under three broad groups; Surveillance in Human Health Sector, Surveillance in Animal Health Sector, and Surveillance for the Reservoir Hosts, were carried out to determine the prevalence, risk of virus infections and transmission in human and swine populations as well as the source and reservoir hosts of Nipah virus. Surveillance data showed that the virus spread rapidly among pigs within infected farms and transmission was attributed to direct contact with infective excretions and secretions. The spread of the virus among pig farms within and between states of peninsular Malaysia was due to movement of pigs. The transmission of the virus to humans was through close contact with infected pigs. Human to human transmission was considered a rare event though the Nipah virus could be isolated from saliva, urine, nasal and pharyngeal secretions of patients. Field investigations identified fruitbats of the Pteropid species as the natural reservoir hosts of the viruses. The outbreak was effectively brought under control following the discovery of the virus and institution of correct control measures through a combined effort of multi-ministerial and multidisciplinary teams working in close co-operation and collaboration with other international agencies.
    Matched MeSH terms: Swine Diseases/epidemiology*; Swine Diseases/transmission; Swine Diseases/virology
  12. Bacterial infections in pigs experimentally infected with Nipah virus
    Berhane Y, Weingartl HM, Lopez J, Neufeld J, Czub S, Embury-Hyatt C, et al.
    Transbound Emerg Dis, 2008 May;55(3-4):165-74.
    PMID: 18405339 DOI: 10.1111/j.1865-1682.2008.01021.x
    Nipah virus (NiV; Paramyxoviridae) caused fatal encephalitis in humans during an outbreak in Malaysia in 1998/1999 after transmission from infected pigs. Our previous study demonstrated that the respiratory, lymphatic and central nervous systems are targets for virus replication in experimentally infected pigs. To continue the studies on pathogenesis of NiV in swine, six piglets were inoculated oronasally with 2.5 x 10(5) PFU per animal. Four pigs developed mild clinical signs, one exudative epidermitis, and one neurologic signs due to suppurative meningoencephalitis, and was euthanized at 11 days post-inoculation (dpi). Neutralizing antibodies reached in surviving animals titers around 1280 at 16 dpi. Nasal and oro-pharyngeal shedding of the NiV was detected between 2 and 17 dpi. Virus appeared to be cleared from the tissues of the infected animals by 23 dpi, with low amount of RNA detected in submandibular and bronchial lymph nodes of three pigs, and olfactory bulb of one animal. Despite the presence of neutralizing antibodies, virus was isolated from serum at 24 dpi, and the viral RNA was still detected in serum at 29 dpi. Our results indicate slower clearance of NiV from some of the infected pigs. Bacteria were detected in the cerebrospinal fluid of five NiV inoculated animals, with isolation of Streptococcus suis and Enterococcus faecalis. Staphylococcus hyicus was isolated from the skin lesions of the animal with exudative epidermitis. Along with the observed lymphoid depletion in the lymph nodes of all NiV-infected animals, and the demonstrated ability of NiV to infect porcine peripheral blood mononuclear cells in vitro, this finding warrants further investigation into a possible NiV-induced immunosuppression of the swine host.
    Matched MeSH terms: Swine Diseases/epidemiology; Swine Diseases/pathology; Swine Diseases/virology*
  13. New virus fingered in Malaysian epidemic
    Enserink M
    Science, 1999 Apr 16;284(5413):407, 409-10.
    PMID: 10232977 DOI: 10.1126/science.284.5413.407
    Matched MeSH terms: Swine Diseases/epidemiology; Swine Diseases/transmission; Swine Diseases/virology
  14. Fulltext Serological evidence of West Nile viral infection in archived swine serum samples from Peninsular Malaysia
    Mohammed MN, Yasmin AR, Noraniza MA, Ramanoon SZ, Arshad SS, Bande F, et al.
    J Vet Sci, 2021 May;22(3):e29.
    PMID: 33908203 DOI: 10.4142/jvs.2021.22.e29
    West Nile virus (WNV), a neurotropic arbovirus, has been detected in mosquitos, birds, wildlife, horses, and humans in Malaysia, but limited information is available on WNV infection in Malaysian pigs. We tested 80 archived swine serum samples for the presence of WNV antibody and West Nile (WN) viral RNA using ID Screen West Nile Competition Multi-species enzyme-linked immunosorbent assay kits and WNV-specific primers in reverse transcription polymerase chain reaction assays, respectively. A WNV seroprevalence of 62.5% (50/80) at 95% confidence interval (51.6%-72.3%) was recorded, with a significantly higher seroprevalence among young pigs (weaner and grower) and pigs from south Malaysia. One sample was positive for Japanese encephalitis virus antibodies; WN viral RNA was not detected in any of the serum samples.
    Matched MeSH terms: Swine Diseases/blood; Swine Diseases/epidemiology*; Swine Diseases/virology
  15. Australia's vital assistance to Asian nations fighting serious infectious diseases
    Murray G
    Aust. Vet. J., 1999 May;77(5):339.
    PMID: 10376108
    Matched MeSH terms: Swine Diseases/prevention & control*; Swine Diseases/transmission
  16. Fulltext A 'what-if' scenario: Nipah virus attacks pig trade chains in Thailand
    Wongnak P, Thanapongtharm W, Kusakunniran W, Karnjanapreechakorn S, Sutassananon K, Kalpravidh W, et al.
    BMC Vet Res, 2020 Aug 24;16(1):300.
    PMID: 32838786 DOI: 10.1186/s12917-020-02502-4
    BACKGROUND: Nipah virus (NiV) is a fatal zoonotic agent that was first identified amongst pig farmers in Malaysia in 1998, in an outbreak that resulted in 105 fatal human cases. That epidemic arose from a chain of infection, initiating from bats to pigs, and which then spilled over from pigs to humans. In Thailand, bat-pig-human communities can be observed across the country, particularly in the central plain. The present study therefore aimed to identify high-risk areas for potential NiV outbreaks and to model how the virus is likely to spread. Multi-criteria decision analysis (MCDA) and weighted linear combination (WLC) were employed to produce the NiV risk map. The map was then overlaid with the nationwide pig movement network to identify the index subdistricts in which NiV may emerge. Subsequently, susceptible-exposed-infectious-removed (SEIR) modeling was used to simulate NiV spread within each subdistrict, and network modeling was used to illustrate how the virus disperses across subdistricts.

    RESULTS: Based on the MCDA and pig movement data, 14 index subdistricts with a high-risk of NiV emergence were identified. We found in our infectious network modeling that the infected subdistricts clustered in, or close to the central plain, within a range of 171 km from the source subdistricts. However, the virus may travel as far as 528.5 km (R0 = 5).

    CONCLUSIONS: In conclusion, the risk of NiV dissemination through pig movement networks in Thailand is low but not negligible. The risk areas identified in our study can help the veterinary authority to allocate financial and human resources to where preventive strategies, such as pig farm regionalization, are required and to contain outbreaks in a timely fashion once they occur.

    Matched MeSH terms: Swine Diseases/epidemiology*; Swine Diseases/virology
  17. Fulltext Isolation of Mycoplasma hyosynoviae from pneumonic lung of swine
    Dahlia H, Tan LJ, Zarrahimah Z, Maria J
    Trop Biomed, 2009 Dec;26(3):341-5.
    PMID: 20237449 MyJurnal
    The isolation of Mycoplasma hyosynoviae from a piglet with severe pneumonia is described. This is the first report of M. hyosynoviae isolation in the country. The lung sample where the isolation was made was severely consolidated, suppurative and pleurisy. The pathogenicity of the M. hyosynoviae isolated has yet to be determined.
    Matched MeSH terms: Swine Diseases/diagnosis; Swine Diseases/microbiology*
  18. Prevalence of Onchocerca japonica and O. takaokai infections in the Japanese wild boar, Sus scrofa leucomystax, and the Ryukyu wild boar, S. s. riukiuanus, in Japan
    Uni S, Fukuda M, Uga S, Agatsuma T, Nakatani J, Suzuki K, et al.
    Parasitol Int, 2021 Aug;83:102313.
    PMID: 33662527 DOI: 10.1016/j.parint.2021.102313
    Reports of zoonotic infections with Onchocerca japonica (Nematoda: Filarioidea), which parasitizes the Japanese wild boar, Sus scrofa leucomystax, have recently increased in Japan. To predict the occurrence of infection in humans, it is necessary to determine the prevalence of O. japonica infection in the natural host animals. We investigated the presence of adult worms in the footpads, and of microfilariae in skin snips, taken from the host animals, between 2000 and 2018. Onchocerca japonica was found in 165 of 223 (74%) Japanese wild boars in Honshu and Kyushu. Among the nine regions studied, the highest prevalence of O. japonica infection was found in Oita, Kyushu, where 47 of 52 (90.4%) animals were infected. The ears were the predilection sites for O. japonica microfilariae. Adult worms of O. japonica were found more frequently in the hindlimbs than in the forelimbs of the host animals. Onchocerca takaokai was found in 14 of 52 (26.9%) Japanese wild boars in Oita. In Kakeroma Island among the Nansei Islands, both O. japonica and O. takaokai were isolated from the Ryukyu wild boar, S. s. riukiuanus. These observations could help predict future occurrences of human zoonotic onchocercosis in Japan.
    Matched MeSH terms: Swine Diseases/epidemiology*; Swine Diseases/parasitology
  19. Molecular detection of Anaplasma spp. in pangolins (Manis javanica) and wild boars (Sus scrofa) in Peninsular Malaysia
    Koh FX, Kho KL, Panchadcharam C, Sitam FT, Tay ST
    Vet Parasitol, 2016 Aug 30;227:73-6.
    PMID: 27523941 DOI: 10.1016/j.vetpar.2016.05.025
    Anaplasma spp. infects a wide variety of wildlife and domestic animals. This study describes the identification of a novel species of Anaplasma (Candidatus Anaplasma pangolinii) from pangolins (Manis javanica) and Anaplasma bovis from wild boars (Sus scrofa) in Malaysia. Based on 16S rRNA gene sequences, Candidatus Anaplasma pangolinii is identified in a distinct branch within the family Anaplasmataceae, exhibiting the closest sequence similarity with the type strains of Anaplasma bovis (97.7%) and Anaplasma phagocytophilum (97.6%). The sequence also aligned closely (99.9%) with that of an Anaplasma spp. (strain AnAj360) detected from Amblyomma javanense ticks. The nearly full length sequence of the 16S rRNA gene derived from two wild boars in this study demonstrated the highest sequence similarity (99.7%) to the A. bovis type strain. Partial 16S rRNA gene fragments of A. bovis were also detected from a small population of Haemaphysalis bispinosa cattle ticks in this study. Our finding suggests a possible spread of two Anaplasma species in the Malaysian wildlife and ticks. The zoonotic potential of the Anaplasma species identified in this study is yet to be determined.
    Matched MeSH terms: Swine Diseases/microbiology*; Swine Diseases/epidemiology
  20. Influenza HI antibodies in pig and man in Malaysia (with special reference to swine influenza)
    Tan DS, Omar M, Yap TC
    Med J Malaysia, 1979 Dec;34(2):159-62.
    PMID: 548720
    Matched MeSH terms: Swine Diseases/immunology*; Swine Diseases/epidemiology
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