Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2007.4144.4147JamehdarS. AmelSabahiF. ZandiK. ShafieeA. ZadehS. FaghihJalilianF. Azizi1220071022Limited information is available concerning the role of measles-specific cell mediated immunity as a correlate of long-term protection from measles infection. Although serological responses are determined in epidemiological studies and high antibody titer is a good indicator of protection, the role of Cell-Mediated Immunity (CMI) has to be defined more clearly. In this study, Lymphocyte Proliferation (LP) and Viral Neutralization Test (VNT) were used in order to measure measles-specific cellular and humoral immune responses of 100 high school students in Tehran. From total number of subjects studied, 33 were girls and 67 were boys and all were in good health. Of these, 77 had protective neutralizing measles antibody titers and 23 did not have such titer. The results of LP showed that 89 subjects had protective cellular immune responses and 11 did not. A quantitative relationship between humoral and cellular immune responses was not observed. These findings suggest that measles-specific protective CMI is measurable for longer time in comparison to humoral immunity. These data suggest that LP responses may be better sustained than antibody titers in some children.]]>Al-Attar and J. Reisman,199514149151Cohen, B.J., R.P. Parry, D. Doblas, D. Samuel, L. Warrener, N. Andrews and D. Brown,2006131209212Dhiman, N., I.G. Ovsyannikova, R.M. Jacobson, R.A. Vierkani, V.S. Pankratz, S.J. Jacobsen and G.A. Poland,2005115154161Khodabandeh Loo, M., F. Sabahi, H. Soleimanjahi, A. Kazemnejad and M.H. Roustai,20031810851089Klinge, J., S. Lugauer, K. Kom, U. Heininger and K. Stehr,20001831343140Lopez, N., B. Wark and E. Mills,20001813931401Moss, W.J., M.O. Ota and D.E. Griffin,20043613801385Nanan, R. and A. Rauch,20008113131319Neuman, P.W., J.M. Weber, A.G. Jessamine and M.W. O`shaughnessy,198522296298Nossal, G.,200078224225Ohsaki, M., H. Tsusumi, R. Takeuchi, K. Seki and S. Chiba,200042233235Papania, M., A. Baughman, S. Lee, J. Cheek and W. Atkinson,19991045959Permar, S.R., S.A. Klumpp, K.G. Mansfield, K. Woong-Ki and D.A. Gorgone et al.,20038+ lymphocytes in control and clearance of measles virus infection in rhesus monkeys.]]>7743964400Pukhalsky, A.L., G.V. Shmarina, M.S. Bliacher, I.M. Fedorova, A.P. Toptygina, J.J. Fisenko and V.A. Alioshkin,200312203207Roberts, M. and M. Tobias,2000124249287Roodbari, F., M.H. Roustai, A. Mostafaie and F. Sabahi,200310439442Sabahi, F., M. Rola-Pleszcynski, S. Oconnel and L. Frankel,199533381392Tischer, A. and E. Gerike,20001813821392Tsai, H., L. Huang, Y. Shih, J. Chen and T. Jiang,199912343348World Health Organization,20052005Wong-Chew, R.M., J.A. Beeler, S. Audet and J.I. Santos,200370276280