آکادمی میکروبشناسی ایران
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- الف) ویروس آنفولانزا
- ب) ویروس زیکا
- ج) ویروس هپاتیت C
- د) ویروس هرپس سیمپلکس
The genus Klebsiella belongs to the tribe Klebsiellae, a member of the family Enterobacteriaceae. The organisms are named after Edwin Klebs, a 19th century German microbiologist.
- الف) Candida albicans
- ب) Aspergillus fumigatus
- ج) Cryptococcus neoformans
- د) Dermatophytes
- الف) Escherichia coli
- ب) Staphylococcus aureus
- ج) Mycobacterium tuberculosis
- د) Pseudomonas aeruginosa
Papillomavirus is an oncogenic virus which infects mucosal and cutaneous epithelia where it induces benign hyperproliferative lesions. Few studies have been conducted on the causative factors associated with the development of cancer. Infections by high-risk human papillomaviruses (HPVs) have been implicated as causative agents in a variety of cancers such as anogenital, and head and neck cancers. HPVs appear to have evolved mechanisms resulting in escape from host immune surveillance and delay of resolution of infection. The HPV E5 oncoprotein is one of the possible effectors that allows the virus to escape from host immune system through the downregulation of surface classical major histocompatibility complex class I (MHC I) and not the nonclassical MHC I. Lack of classical MHC I in infected cells expressing E5 would allow evasion of cytotoxic T lymphocytes (CTLs) killing and thus establishment and persistence of viral infection.
- الف) برای رشد نیاز به اکسیژن دارند.
- ب) میتواند با یا بدون اکسیژن رشد کند.
- ج) در حضور اکسیژن نمیتواند رشد کند.
- د) از اکسیژن فقط در غلظتهای پایین استفاده میکنند.
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