Microbiology 2

  1. 1.     represent by the common cold or polio, generate so many viruses that the host cell bursts, spread rapidly among host cells, treatment must start early
    • Lytic infection(lysis): 

  2. 1.     involve a virus that isn’t replicated, often involved lysogeny. 
    • Latent infection

  3. 1.     the virus periodically reactivates.
    • Chronic latent: 
  4. release new virus gradually, may continues for month or year without causing overt disease, the virus can’t be attacked unless it begins a lytic cycle
    • Persistent infections
  5. DNA virus
    • : caused by DNA viruses are typically direct contact diseases via kin or mucous membranes, the host cells are typically lysogenized, infections are often chronic latent, cancer are associated with DNA viruses

  6. Genital herpes, chickenpox, mononucleosis is ALL type of Herpes.
  7. Herpes cause by type II, in the U.S the herpes virus infects 1 in 4 over the age of 12, is a direct contact disease transmitted via sexual contact, fomites(non living thing), childbirth. Becomes latentin satellite cells that support sensory neurons. Symptoms: most don’t know they have it, include blister and lesions, itching and burning, decline in severity with time as some immunity develops, some immunity but not eradication(life long
    • Genital herpes

  8. 1.     causes by Varicella zoster range just humans, skin and satellite cells that support sensory neurons, transmitted via the respiratory system, localizes in the skin where blister develop and may become latent in satellite cells reappearing in 20% of adults as shingles
    • Chickenpox (shingles):

  9. 1.     Epstein-Barr virus. The virus lysogenized B lymphoces, cell of the lymphatic system and epithelial cells and my remain latent in the body, is a direct contact diseases transmitted by saliva via the respiratory tract and via fomites. Symptoms and signs include jaundice, fever, enlarged lymph nodes, sore throat, headache, weakness, enlarges spleen and liver and fatigue, life long and recurrent symptoms 
    • Mononucleosis

  10. 1.     infects epithelial cells of the skin and mucous membranes infection of the skin epidermis leads to the formation of warts that spread. Sexually transmitted infection of mucous membrane can lead to cancer of the cervix mouth, throat, head, neck and anus.Vaccine: Gardasil: approved in June 2006, contains the two viruses responsible for most cases of cervical cancer(HPV Protein genetically engineered in yeast and then assembled into a capsid without a core)
    • Cervical cancer (papillomarviurs
  11. Serum hepatitis is caused by the Hepatits B virus is acquired via contamined needles, transfusion and sexually. 300 million people are carriers of hepatitis B,  
    • Hepatitis B
    • The most varied viruses, cuases important epidemic diseases, associated with important emerging dieases(SARS,Ebola, avian flu and may be our most important new diease threat

  13. 1.     byRhabdoviruse only the rabies virus infects humans is transmitted via inoculation of the saliva of an infected mammal. Raccoons are the mammals most likey to be infected, worldwide dogs are the most important vector, in Washington bats are the most common source of infection. Transplant of organs and inhalation can attack sensory and motor neurons, symptoms: paralysis, numbing, aggression, depression and hydrophobia, fea of swallowing. Treatment consist of a series of 5 vacine injections over a month and an immediate injection of rabies antibodies at the site of infection. Not much survivors
    • Rabies
  14. caused by picornavirus,99%of the infections are benign is transmitted primarily via contaminated water/food. the virus replicates in the mucos membranes of the throat and spreads to the intestinala tract. If not stopped by the immune system, the virus can spread throughout the body via the circulatory and lympathic system, infecting nerve and muscle cells. Symptoms may include upper respiratory congestion and/or various degree of paralysis. Treatment: Salk and Sabin vaccines are available.
    • Polio
Card Set
Microbiology 2