Two novel porcine teschovirus strains as the causative agents of encephalomyelitis in the Netherlands
Vreman, Sandra ; Caliskan, Nermin ; Harders, Frank ; Boonstra, Jan ; Peperkamp, Klaas ; Ho, Cynthia K.Y. ; Kuller, Wikke ; Kortekaas, Jeroen - \ 2020
BMC Veterinary Research 16 (2020)1. - ISSN 1746-6148
Non-suppurative encephalomyelitis - Porcine teschovirus - Weanling pigs
Background: Porcine teschovirus (PTV) circulates among wild and domesticated pig populations without causing clinical disease, however neuroinvasive strains have caused high morbidity and mortality in the past. In recent years, several reports appeared with viral agents as a cause for neurologic signs in weanling and growing pigs among which PTV and new strains of PTV were described. Case presentation: On two unrelated pig farms in the Netherlands the weanling pig population showed a staggering gate, which developed progressively to paresis or paralysis of the hind legs with a morbidity up to 5%. After necropsy we diagnosed a non-suppurative encephalomyelitis on both farms, which was most consistent with a viral infection. PTV was detected within the central nervous system by qPCR. From both farms PTV full-length genomes were sequenced, which clustered closely with PTV-3 (98%) or PTV-11 (85%). Other common swine viruses were excluded by qPCR and sequencing of the virus. Conclusion: Our results show that new neuroinvasive PTV strains still emerge in pigs in the Netherlands. Further research is needed to investigate the impact of PTV and other viral agents causing encephalomyelitis within wild and domestic pig populations supported by the awareness of veterinarians.
Preface to Special Issue
Caliskan, M.E. ; Struik, P.C. - \ 2010
Potato Research 53 (2010)4. - ISSN 0014-3065 - p. 253 - 254.
Can physiology help us to combat late blight in potato?
Struik, P.C. - \ 2010
In: Potato Agrophysiology, Proceedings of the International Symposium on Agronomy and Physiology of Potato, Nevsehir, Turkey , 20 - 24 September, 2010. - Nevsehir, Turkey :
Late blight is a devastating disease in potato production world-wide. Breeding for resistance is complex because of the versatile and aggressive population of Phytophthora infestans, which overcomes any new genetic source of resistance very rapidly. There are reliable fungicides available to control the disease but chemical control is costly and harmful to the environment. There are no cultural practices reducing the infestation, which are reliable enough to cope with the disease in a non-chemical way. Given the close link between the physiological condition of the crop and its resistance to late blight, this paper addresses the question whether crop physiology can help to combat the disease. Although there are possibilities to (partly) escape to the late blight by advancing the crop cycle or the tuber bulking, it is concluded that crop physiology can do little to reliably reduce the susceptibility to late blight. Breeding for resistance remains the best option.