Gram -ve rods - part 2 Flashcards
Describe Shigella species in terms of their movement and where they are found.
Non-motile
Found in food and water
Describe the critical inoculum of Shigella species.
Very low inoculum - <200 bacteria to cause infection
What do Shigella species cause?>
Bloody diarrhea, fever, cramps, dysentery
Where would you get Yersinia enterocolitica from?
Pork, cold cuts, water
What does Yersinia enterocolitica cause?
Diarrhea and pseudoappendicitis syndrome
What is pseudoappendicitis?
Yersinia enterocolitica gets into the mesenteric lymph nodes and produces a painful lymphadenopathy which can mimick the presentation of appendicitis
What is the bacterium that caused the black death?
Yersinia pestis
What are the two forms of the plague?
Bubonic and pneumonic forms
Where does one get yersinia pestis from?
Fleas from rats
carried by ground squirrels in the SW USA
What does bubos mean?
Lymph nodes of the groin
If someone has the pneumonic form, how can it be transmitted?
Via the respiratory route
How does one get the pneumonic form of the plague?
Lymph system is connected to the circulation via the thoracic duct which can allow Yersinia pestis to settle in the lungs
What is arteritis obliterans?
end of extremities mummify - blackening of extremities associated with the Black death
Describe the movement status of Klebsiella pneumoniae and what is causes.
Non motile
Pneumonia, UTIs, sepsis
Klebsiella pneumoniae causes pneumonia mostly in what individuals?
Alcoholics, the debilitated and the hospitalized
What does Klebsiella granulomatis cause?
Causes granuloma inguinale, an STI
Painless genital ulcers that look like primary syphilis but little inguinal lymphadenopathy.
Granuloma inguinale
Klebsiella granulomatis is more common where?
Developing countries
This bacterium is a leading cause of nosocomial infections.
Serratia marcescens
