Foot and mouth disease (FMD) is a major threat, not only to countries whose economies rely on agricultural exports, but also to industrialized countries that maintain a healthy domestic livestock industry by eliminati...Foot and mouth disease (FMD) is a major threat, not only to countries whose economies rely on agricultural exports, but also to industrialized countries that maintain a healthy domestic livestock industry by eliminating major infectious diseases from their livestock populations. In this paper a simple mathematical model is formulated and comprehensively analyzed to assess the impact of vaccination and culling on controlling FMD. Overally the study demonstrates that vaccination and culling are essential on controlling FMD if they are all implemented. Furthermore the study illustrates that culling latently infected (early detection of infected animals) is extremely important on controlling FMD dynamics.展开更多
All over the world,tuberculosis is a public health problem in prisons due to the fact that many inmates come from communities at high risk of tuberculosis,to their living conditions in prisons and to the insufficienci...All over the world,tuberculosis is a public health problem in prisons due to the fact that many inmates come from communities at high risk of tuberculosis,to their living conditions in prisons and to the insufficiencies of prisons health services.In this paper,Wells–Riley’s equation for modeling airborne infection within indoor environment is incorporated on a simple tuberculosis model,to investigate the effect of prison environment on the transmission dynamics of tuberculosis.At best the study suggests that a prison cell of volume 195 m3 with 40 adult inmates comprising of 90%susceptibles and 10%infectives,requires a ventilation rate of 8 AC/h to maintain the reproductive number less than unity.However,if the population doubles then the ventilation required to maintain the reproductive number less than unity becomes 26 AC/h which is three times more than the actual ventilation rate required for a 100%full.展开更多
文摘Foot and mouth disease (FMD) is a major threat, not only to countries whose economies rely on agricultural exports, but also to industrialized countries that maintain a healthy domestic livestock industry by eliminating major infectious diseases from their livestock populations. In this paper a simple mathematical model is formulated and comprehensively analyzed to assess the impact of vaccination and culling on controlling FMD. Overally the study demonstrates that vaccination and culling are essential on controlling FMD if they are all implemented. Furthermore the study illustrates that culling latently infected (early detection of infected animals) is extremely important on controlling FMD dynamics.
文摘All over the world,tuberculosis is a public health problem in prisons due to the fact that many inmates come from communities at high risk of tuberculosis,to their living conditions in prisons and to the insufficiencies of prisons health services.In this paper,Wells–Riley’s equation for modeling airborne infection within indoor environment is incorporated on a simple tuberculosis model,to investigate the effect of prison environment on the transmission dynamics of tuberculosis.At best the study suggests that a prison cell of volume 195 m3 with 40 adult inmates comprising of 90%susceptibles and 10%infectives,requires a ventilation rate of 8 AC/h to maintain the reproductive number less than unity.However,if the population doubles then the ventilation required to maintain the reproductive number less than unity becomes 26 AC/h which is three times more than the actual ventilation rate required for a 100%full.
