Coxiella burnetii is the causative agent of the zoonotic Q fever, and its reservoirs include ticks and livestock, which are key sources of transmission to humans. Although there have been several studies on the prevalence of C. burnetii antibodies in dairy cattle bulk tank milk (BTM), there is a lack of information on the molecular detection of C. burnetii in BTM in South Korea. Thus, this study was designed to assess milk shedding of C. burnetii in BTM from dairy cattle herds. Among the 607 BTM samples collected from 41 counties in Gyeongsang provinces in 2015, 108 (17.8%) from 23 (56.1%) counties tested positive for C. burnetii by PCR. Because the 16S rRNA sequences of C. burnetii from all 108 PCR-positive samples were identical, two representative samples (BTM-GB-10 and BTM-GN-63) are described in this paper. These sequences showed high identity (96.9–100%) to other C. burnetii sequences deposited in GenBank. Phylogenetic analysis showed that these two sequences were clustered with existing C. burnetii strains. The relatively high prevalence rates of C. burnetii in BTM detected in this study suggest that C. burnetii is prevalent among dairy cattle herds in South Korea. Thus, implementation of continuous monitoring and control strategies for domestic animals is needed to prevent disease transmission and protect public health.
The present study investigated
the seroprevalence of Toxoplasma gondii (T. gondii)
antibodies by ELISA in horses reared in Korea. Serum samples were collected from 2009
through 2013 from 816 horses reared in Korea. Analysis was performed using a commercial
toxoplasmosis ELISA kit to detect anti-T. gondii antibodies. Overall, 24
out of 816 horses (2.9%) were seropositive for T. gondii. The result was
analyzed by age, gender, breed and region. Significant differences were observed according
to breed and region (P<0.05). This is the first nationwide serological
investigation of T. gondii in horses reared in Korea. The study results
reveal that T. gondii occurs nationwide in Korean horses. 相似文献
Chinese bayberry (Myrica rubra Siebold & Zucc) is an evergreen fruit tree with high ecological and economic values in China. In recent years, a new twig dieback disease caused by Pestalotiopsis mangiferae and P. vismiae was observed in major M. rubra-producing areas of Zhejiang and Fujian Provinces, causing serious economic losses. In this study, 16 isolates of P. mangiferae and 27 isolates of P. vismiae were obtained from diseased leaves, roots and branches of M. rubra from different regions. The optimum growth temperature of the two species of Pestalotiopsis was determined to be 20–25 °C, while the optimum temperature for the germination of conidia was 25–35 °C. The two species of Pestalotiopsis showed rich genetic diversity. Inoculating the conidial suspension of one or both of the two species of the Pestalotiopsis on detached leaves or branches of M. rubra could cause lesions surrounding the inoculation sites with the frequency of 100 %. Moreover, necrotic lesions could be observed on inoculated potted plants with the frequencies of 33.3 % for P. mangiferae, 25 % for P. vismiae and 50 % for a mixed inoculum. 相似文献
Equine piroplasms include two tick-borne protozoan parasites, Babesia caballi and Theileria equi. Although no clinical equine piroplasmosis has been reported in the Republic of Korea, the possible existence of the disease has been proposed due to a nationwide distribution of the vector ticks. To determine if the antibodies against B. caballi and T. equi were present, 184 sera of horses (Equus caballus) raised in the Republic of Korea from 2007 to 2010 were assessed using cELISA kits. Two (1.1%) out of 184 sera were positive for T. equi, but none were seropositive for B. caballi. Both samples tested positive came from one region (Gyeonggi province). The accuracy of the cELISA was confirmed by PCR using primers specific to the 18S rRNA of T. equi. This study presents for the first time horses infected by T. equi in the Republic of Korea. Since the infection of T. equi occurred in horses raised in the Republic of Korea, further studies with continuous monitoring of the vector ticks for equine piroplasms and appropriate control programs need to be established. 相似文献
Among 16 maras housed as a colony at a zoo, 2 initially showed generalized
dermal lesions on the legs, head and abdomen. Approximately 1 month later, following
completion of therapy with amitraz, 6 maras in the same colony, including the 2 previously
diseased animals, showed dermal lesions with severe alopecia and crusting. Sarcoptic mange
was diagnosed on skin scrapings on the basis of morphological criteria. The mites were
highly mobile and abundant in all cases, and no other causative agents were detected.
Colony-wide treatment with ivermectin and prednisolone was administered weekly for a total
of 4 treatments. After therapy was completed in all cohabitants, follow-up scrapings were
negative for Sarcoptes scabiei. This report describes the first known
outbreak of sarcoptic mange in captive maras and successful treatment with acaricides. 相似文献