Some Studies on the Epidemiology of Foot-and-Mouth Diseases Virus

The occurrence of CF-antibodies, SN-antibodies against FMDV. Type 01’ /2/72-Egypt and VIA-antibodies,in serum samplescollected from different species of farm animals in Sharkiaprovince indicate FMD to be wide spread. As vaccin ation islimitted only to cattle and hi ffaloes populations at governmentalfarms, The antibodies in sheep, camels and cattle from privatefarms have been developed by nature exposure of these animalsto the field strain of virus. The Virus Infections Associated (VIA)Antigen test proved to be the most useful in detection of infec-tion, although VIA negative animals also had ser um-rieut ra hz ingantibodies.2- The survival time of FMDV strain 01/2/72-Egypt in the faecessoil, and sewage has been studied daily for periods upto 8 days.a-Infected faeces kept inside doors (at room temp.) lostnearly its virus content within 7 days from the time of. Iecti . th ... f t . t . f 1 00. 7 5111 ec IOn wit a r e mainmg mec rve .rr e 0 - 10glOTCID50/ml, the same remaining titre was left butwithin a short period (5 days) when the infected faecalsample was kept outside doors (in the open atmosphere).b- In the soil the same strain of FMDV lost its infectivitywithin 4 days post-infection. The remaining infective titreafter 4 days p. i. were 1 and 0.75 10glO TCID50/ml. forthose samples kept inside and outside doors respectively.c- In sewage, the strain 01/2/72-Egypt survived for 4 days