eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences December 2009 21 3 641 646 jusps-A 1235 article Bijendra Singh 1 Rachana Khandelwal 1 Nitu Trivedi 1 School of studies in Mathematics, Vikram University, Ujjain M.P. (INDIA) <p style="text-align:justify">A prey-predator SIS model with logistic growth has been considered with parasitic infection in prey and more vulnerability of infected prey to predation. The combined harvesting of both species along with disease related death of prey has also been taken into account. It has been observed that the parameter concerned with disease related death affects the endemic state. Threshold numbers along with stability are also discussed. The contributions of Hethcote <em>et. al</em>.⁷ and Trivedi <em>et. al</em>.¹² follows as corollary.</p> https://www.ultrascientist.org/paper/1235/ Prey-Predator model Epidemiological model Stability