in this paper, the multistage variational iteration method is implemented to solve a general form of the system of first-order differential equations. the convergence of the proposed method is given. to illustrate the proposed method, it is applied to a model for hiv infection of cd4+ t cells and the numerical results are compared with those of a recently proposed method.

Background: In the last 10 years, co-infection of human immunodeficiency virus/human T-cell leukemia virus-1 (HIV/HTLV-1) has emerged as a worldwide health problem. These viruses has the same route to infect human but different effects on CD4 positive T-cells. There was controversial results about the influence of co-infection HIV/HTLV-1 pathogenesis. This study compared clinical course and lab...

patients and methods in total, 98 samples in four groups (hiv-positive and hiv-negative persons with and without oc) were obtained from the oral cavities and cultured on sabouraud’s dextrose agar and chromagar. also blood samples were obtained to assess plasma level of ifn-γ, il-4, il-6 and il-17 using elisa technique. background cell-mediated immunity (cmi) by cd4 + th (t helper)-type cells is...

hepatitis b virus (hbv) is the most prevalent viral infection and is among the leading causes of human liver diseases. nearly 360 millions of people are world widely infected with prolonged forms of hepatitis b including active and inactive chronic forms. chronic hepatitis b (chb) is associated with cirrhosis and hepatocellular carcinoma (hcc) in patients suffering from congenital and/or acquir...

The human immunodeficiency virus (HIV) is lentivirus (subgroup of retrovirus) which causes HIV infection and it acquired immunodeficiency syndrome (AIDS). HIV infection leads to low levels of CD4+T cells through number of mechanisms [1]. Our purpose is to review educative HIV prevention and control as Millennium Development Goal (MDG) and WHO's operational goal. In 2000, when ...

cd27 is a biomarker associated with both t-cells and b-cells activation .plasma soluble cd27 (scd27) was identified as  a marker of disease outcome in human immunodeficiency virus (hiv) infection .testing of plasma scd27 represents a good tool to monitor the change of immune activation during hiv infection.we sought to analyses role of hepatitis c virus (hcv) and also gb virus type c (gbv-c) co...

In this paper, the multistage variational iteration method is implemented to solve a general form of the system of first-order differential equations. The convergence of the proposed method is given. To illustrate the proposed method, it is applied to a model for HIV infection of CD4+ T cells and the numerical results are compared with those of a recently proposed method.

background and objective: candidiasis is a common opportunistic infection in hiv-infected patients. the spectrum of candida infection is diverse, starting from asymptomatic colonization to pathogenicforms. the low absolute cd4+ t-lymphocyte count has traditionally been cited as the greatest risk factor for the development of oropharyngeal candidiasis and current guidelines suggest increased ris...

Sexual intercourse is the major means of HIV transmission, yet the impact of semen on HIV infection of CD4(+) T cells remains unclear. To resolve this conundrum, we measured CD4(+) target cell infection with X4 tropic HIV IIIB and HC4 and R5 tropic HIV BaL and SF162 after incubation with centrifuged seminal plasma (SP) from HIV-negative donors and assessed the impact of SP on critical determina...