skin and mucous membranes of the nose, throat, urethra, and rectum
stomach acid
healthy cells of the nose and lungs
normal mucus and saliva
nonspecific factors: tears, urine, acidity of vaginal secretions - answers✔✔natural barriers
autogenous infection and cross infection - answers✔✔types of infection
caused by pathogens that the patient is already carrying - answers✔✔autogenous infection
caused by pathogens acquired from another person - answers✔✔cross infection
transient and resident - answers✔✔two types of microorganism on the skin
those picked up from one patient and transferred to another patient
soap is sufficient for cleaning - answers✔✔transient organism
extra risk for immuno-compromised patient
germicidal soap must be used - answers✔✔resident organism
,the most serious contaminant found on the skin and on other surfaces - answers✔✔staphylococcus
the single most important action in preventing cross infection - answers✔✔handwashing
transmitted via fecal contaminated food and water - answers✔✔hepatitis A and E
transmitted via bood and or sexual exposure - answers✔✔hepatitis B C D (non B)
mainly due to poor sanitation and overcrowding
incubation period 15-50 days, abrupt onset with high fever to 100.4 F
other sx: loss of appetite, fatigue, fever, muscle aches, nausea and vomiting
2 weeks later: jaundice
most common in children and young adults, peak in autumn
individual with HAV cannot be reinfected
symptoms are mild, no chronic carrier states, HAV vaccination available. - answers✔✔hepatitis A (HAV)
bloodborne pathogen, most serious threat to health care workers.
due to IV users and high sexual activity, most common between 15 to 29 years age.
incubation period 45-160 days
, begins with mild flu like symtoms such as fever, malaise, insidious onset of anorexia, abdominal pain
other symptoms: chills, nausea, joint pains, rash and diarrhea
2-6 weels later: extreme fatigue and depression last for months
of these who recover from symptoms, 70 % remain infectious for 3 months or more.
6% are lifelong carriers and they may develop cirrhosis of the liver and liver cancer. of the chronic
carriers 15 % to 25 % die of liver disease
treatment: there is no biomedical treatment for HBV although an injection of HBIG (hepatitis b immune
globulin) immediately following exposure may provide protection in unvaccinated persons
3 injections of HBV vaccination is available, and it lasts for at least 20 years - answers✔✔hepatitis B
(HBV)
transmitted by exposure to contaminated blood. mostly found in adults
most common in transfusion associated hepatitis
most prevalent in IV drug users
No vaccine