Dear Editor-in-Chief The present global consideration is on the recent outbreak of 2014 Western Ebola virus in West Africa (1 – 3). This viral hemorrhagic fever wide spreads to several countries in West Africa and remote countries (1 - 3). With high death rate, the disease is presently on the list of public health threatens. The main problem for management of the infection is the limited knowl...

background and aims: recently, a novel dna virus was isolated from the serum of a patient with post-transfusion non a-g hepatitis and named tt virus. the aim of this study was to determine the prevalence tt virus among cirrhotic patients due to hepatitis b & c in infection ahwaz. methods: the prevalence of ttv infection was studied in 41 patients with liver cirrhosis. ttv dna was detected by se...

zika virus is an arbovirus identified first time in 1947 in uganda. zika epidemic is a threat far greater than the ebola outbreak. the world health organization has urged asian countries to be vigilant about the risk of spreading zika virus and preventive measures to control it. in iran, 64 species of mosquitoes from culicidea family have been reported three of which belong to the aedes genus, ...

Since the initial onset of the current severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic from Wuhan, China in December 2019, the virus is now spread all around the world, and the disease is named COVID-19. Based on the WHO report on April 18, 2021, there are now more than 140 million confirmed cases and three millions deaths due to this disease[1]. The virus pathogenesis, cl...

Newcastle disease (ND) is one of the most serious illnesses of chickens. Live vaccines are widely used to prevent chicken from the disease all over the world. To access the effective and potentiate ND vaccine, a homogenous subpopulation from LaSota strain was selected following cultivation of the virus on primary chicken embryofibroblast (CEF) cells. Pathogenicity indices and molecular characte...

The highly contagious new coronavirus virus, SARS-CoV-2, was first appeared in Wuhan, China in late 2019. The virus has spread to 216 countries, including Iran, until 7 September 2020. So far, the number of people infected by the new corona virus and died from the disease is 27032617 and 881464 worldwide, respectively. Therefore, it is necessary to introduce the available treatments for this vi...

Newcastle disease (ND) is one of the most important diseases that affect birds; the epizootic nature of the disease has caused severe economic losses in the poultry industry worldwide. In this experiment ND virus (NDV) was inactivated by two different chemicals binary ethylenimine (BEI) and formaldehyde. Formaldehyde was used at 0.1%, while BEI was used at concentrations of 1 to 4 mM. NDV inact...

In order to adapt LaSota strain of Newcastle disease virus (NDV) on chick embryo fibroblast (CEF) cells, 0.1 ml from LaSota vaccine produced in Razi vaccine and serum research institute inoculated to the CEF cells and was passaged five times in the CEF grown in Eagle’s minimum essential medium (MEM). First to third passages were blind but in fourth passage cytopathic effect of virus was observe...