Publications by authors named "Daraka Tongthainan"
Zika virus (ZIKV) is a member of the Flaviviridae virus family and poses a significant global health concern. ZIKV is transmitted by mosquitoes, and it has been implicated in various neurological conditions associated with fetal brain development. ZIKV has two transmission cycles: a sylvatic cycle in which nonhuman primates are infected via arboreal mosquito bites, and an interhuman (urban) cycle in which the virus is transmitted among primates by mosquitoes.
View Article and Find Full Text PDFArticle Synopsis
- * A study measured the presence of antibodies to mosquito saliva in different macaque species across national parks, revealing high antibody levels, especially against the Culex quinquefasciatus species, indicating significant interaction with mosquito vectors.
- * The research highlights the potential for using mosquito saliva as a biomarker for studying host interactions and pathogen exposure, while also raising concerns about disease transmission between macaques, visitors, and mosquitoes in natural areas.
The number of patients infected with simian malaria is gradually increasing in many countries of Southeast Asia and South America. The most important risk factor for a zoonotic spillover event of malarial infection is mostly influenced by the interaction between humans, monkeys, and vectors. In this study, we determine the protein expression profile of a wild stump-tailed macaque (Macaca arctoides) from a total of 32 blood samples collected from Prachuap Kiri Khan Province, Thailand.
View Article and Find Full Text PDFAfter publication of the article, the authors received comments from a member of the editorial board who is an expert in the field of adenovirus concerning figures and references that should be included in the paper [...
View Article and Find Full Text PDFArticle Synopsis
- Metagenomics has been effective in finding new pathogens and monitoring outbreaks, helping identify various viruses in asymptomatic long-tailed macaques from Thailand.
- A specific workflow detected novel astroviruses, enteroviruses, and adenoviruses in fecal samples, revealing a potential new adenovirus that can infect both monkeys and humans.
- The study underscores the importance of ongoing zoonotic surveillance in areas where humans and animals coexist to prevent the emergence of new pathogens.
Article Synopsis
- Japanese encephalitis virus (JEV) is a common cause of encephalitis in Asia, transmitted to humans primarily through mosquito bites, with pigs and birds serving as main hosts.
- This study found JEV neutralizing antibodies in non-human primates (NHPs) and humans in Thailand, indicating natural infection and transmission between species, with seropositivity rates of 14.7% in monkeys and up to 45.2% in humans.
- The results suggest a need for ongoing serological studies at the animal-human interface to monitor JEV, especially given the higher infection rates in older humans.
Simian adenoviruses are in the genus of the family . This family is composed of non-enveloped, double-stranded DNA viruses that infect a wide range of animals. Mastadenoviruses infect mammals, including non-human primates and humans.
View Article and Find Full Text PDFThis study aimed to determine the incidence of leptospirosis and melioidosis in long-tailed macaques (Macaca fascicularis) in Thailand. Serum samples from 223 monkeys were subjected to the Lepto Latex Test and indirect hemagglutination (IHA) test to detect antibodies against Leptospira spp. and Burkholderia pseudomallei.
View Article and Find Full Text PDFBackground: Certain species of macaques are natural hosts of Plasmodium knowlesi and Plasmodium cynomolgi, which can both cause malaria in humans, and Plasmodium inui, which can be experimentally transmitted to humans. A significant number of zoonotic malaria cases have been reported in humans throughout Southeast Asia, including Thailand. There have been only two studies undertaken in Thailand to identify malaria parasites in non-human primates in 6 provinces.
View Article and Find Full Text PDFArticle Synopsis
- * This study investigated the exposure of various macaque species in Thailand to mosquito-borne flaviviruses and alphavirus by testing their blood for antibodies against dengue, Zika, and chikungunya viruses.
- * Results showed that stump-tailed macaques had antibodies for dengue and Zika, while long-tailed and pigtailed macaques lacked such antibodies; however, one long-tailed macaque had antibodies for chikungunya, indicating a potential risk of these viruses to human health due to increasing human-wildlife interactions. *
The impact of ovarian stimulation protocol on oocyte quality, subsequent in vitro embryo development, and pregnancy after transfer to recipients in Eld's deer (Rucervus eldii thamin).
Theriogenology
March 2017
Article Synopsis
- - The study focuses on using IVF and embryo transfer to help sustain endangered Eld's deer populations, evaluating how FSH hormone injections affect oocyte collection and embryo development quality.
- - Experimental results showed that while FSH stimulation increased the size of follicles, it did not significantly improve the number or quality of oocytes collected, nor the overall success rate of embryo cleavage post-IVF.
- - Notably, the experiment led to the first successful birth of a live Eld's deer fawn from in vitro-produced embryos, highlighting potential advancements in conservation techniques for this species.
Article Synopsis
- - This study investigated how slow versus fast freezing affects testicular tissue and sperm from various wild animals collected post-mortem, specifically looking at seven species including felids, cervids, and bovids in captivity.
- - Results showed that slow freezing caused greater damage to sperm membrane and DNA integrity compared to fast freezing, although the difference wasn't statistically significant.
- - While fast freezing seemed to preserve sperm better, it might have negatively impacted the health of intra-tubular cells, indicating a trade-off in cryopreservation methods for wildlife gamete recovery.
The prevalence of antibodies against Toxoplasma gondii was investigated by commercial latex agglutination test kit (Toxocheck-MT 'Eiken') in captive felids maintained at zoos and a wildlife breeding center in different geographic regions of Thailand. Sera from a total of 136 captive felids of 12 species was obtained between 2002 and 2004. The overall seroprevalence of T.
View Article and Find Full Text PDF