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Mousa Ahmadpour-Kacho , Yadollah Zahed Pasha , Hojatollah Ehteshammanesh , Alireza Yahyaei Shahandashti , Fatemeh Heydari , Tahereh Jahangir , Faezeh Aghajanpour ,
Volume 73, Issue 9 (12-2015)
Abstract

Background: Chickenpox is a very contagious viral disease that caused by varicella-zoster virus, which appears in the first week of life secondary to transplacental transmission of infection from the affected mother. When mother catches the disease five days before and up to two days after the delivery, the chance of varicella in neonate in first week of life is 17%. A generalized papulovesicular lesion is the most common clinical feature. Respiratory involvement may lead to giant cell pneumonia and respiratory failure. The mortality rate is up to 30% in the case of no treatment, often due to pneumonia. Treatment includes hospitalization, isolation and administration of intravenous acyclovir. The aim of this case report is to introduce the exogenous surfactant replacement therapy after intubation and mechanical ventilation for respiratory failure in neonatal chickenpox pneumonia and respiratory distress.

Case Presentation: A seven-day-old neonate boy was admitted to the Neonatal Intensive Care Unit at Amirkola Children’s Hospital, Babol, north of Iran, with generalized papulovesicular lesions and respiratory distress. His mother has had a history of Varicella 4 days before delivery. He was isolated and given supportive care, intravenous acyclovir and antibiotics. On the second day, he was intubated and connected to mechanical ventilator due to severe pneumonia and respiratory failure. Because of sever pulmonary involvement evidenced by Chest X-Ray and high ventilators set-up requirement, intratracheal surfactant was administered in two doses separated by 12 hours. He was discharged after 14 days without any complication with good general condition.

Conclusion: Exogenous surfactant replacement therapy can be useful as an adjunctive therapy for the treatment of respiratory failure due to neonatal chickenpox.


Amin Derakhshanfar , Hadi Tavakkoli , Javad Moayedi , Ali Poostforoosh Fard ,
Volume 77, Issue 12 (3-2020)
Abstract

Background: The H9N2 subtype of the influenza virus, which is endemic in many regions of Iran, is considered as a candidate for future pandemics. In the present study, excretion time of the Iranian endemic influenza virus (H9N2 subtype) from the feces and pharyngeal secretions of laying chicken breeds was evaluated.
Methods: This experimental study conducted at the Diagnostic Laboratory Sciences and Technology Research Center of Shiraz University of Medical Sciences, and the Department of Clinical Science in School of Veterinary Medicine of Shahid Bahonar University of Kerman, from June 2017 to September 2017. At first, the influenza virus A/Chicken/Iran/SH-110/99 (H9N2) was cultured in the allantoic fluid of the embryonated egg and the EID50 for virus was determined by Reed and Muench method. Afterward, the Hy-Line chicks were inoculated intranasally with 106 EID50/ml of influenza virus (H9N2 subtype) and samples were collected from the oropharynx and feces of the birds on days 2, 5, 10 and 17 after inoculation. The presence of the virus in the samples of challenged birds was assessed using the real-time polymerase chain reaction (PCR) method.
Results: The influenza virus was shed from the oro-pharyngeal secretion and feces of the birds 2 days post-infection, and continued until days 10 and 17, respectively. In comparison to the oro-pharynx, the virus was recovered in the feces for a longer time. The influenza virus was detected in 100% and 57.1% of oro-pharyngeal and feces samples of the infected birds on day 2, 85.7% and 100% on day 5, 28.6% and 71.4% on day 10, and 0% and 28.6% on day 17 post-inoculation, respectively. The maximum risk of infected chicken for humans is seen from 2 to 5 days post-infection.
Conclusion: Detection of virus in the samples of birds that challenged with the H9N2 influenza virus showed that the virus could shed from the feces to the surrounding environment longer than the pharyngeal secretions and could be hazardous to humans in contact.

Maryam Farzaneh, Mojgan Hosseini,
Volume 78, Issue 4 (7-2020)
Abstract

Chick embryos are a great historical research model in basic and applied sciences. Along with other animal models, avian and specifically chicken embryo has been attended, as well. Avian fertilized eggs as a natural bioreactor are an efficient tool for producing recombinant proteins and vaccines manufacturing. Due to the limitations of birds' eggs for viral replication, avian stem cells culture technologies access to safe methods as well as large-scale production of a variety of human and animal vaccines. Chicken pluripotent stem cells present the unique property of self-renewal and the ability to generate differentiated progeny in all embryonic lineages such as ectoderm, mesoderm, and endoderm in vitro. For the first time, chicken embryonic stem cells (cESCs) derived from the blastodermal cells of stage X embryos in vitro. Chicken ESC provides a great model of early embryo and they are useful for gene manipulation, virus proliferation, and the generation of transgenic birds. In addition to blastodermal cells, pluripotent cell lines can be produced by reprogramming of chicken fibroblasts into induced pluripotent stem cells (iPSCs) with transcription factors such as OCT4, NANOG, SOX2, KLF4, LIN28, and C-MYC that are well known to contribute to the reprogramming of somatic cells into an iPSCs. Similar to chicken ESCs, iPSCs have properties of unlimited self-renewal in vitro and the capacity for differentiation to all three embryonic germ layers. Chicken iPSCs have been a useful tool for the production of transgenic birds and viral vaccines. Despite the benefits and multiple applications of chicken pluripotent stem cells, the propagation of these cells is limited and some important challenges should be eliminated before their use in vaccine manufacturing. It is necessary to define the appropriate culture conditions for chicken pluripotent stem cells. For example, the presence of endogenous viruses in the avian species should be evaluated for human vaccine production. Currently, primary chicken fibroblast cells are still mainly used for vaccine production. This review covers the resources to achieve chicken derived cell lines for vaccine manufacturing.
 


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