Listeria monocytogenes By Christine Dolin Metabolism Aerobic All

Listeria monocytogenes By Christine Dolin

Metabolism: • Aerobic • All I could find was that it’s a “chemoorganotroph” which I’m guessing means chemoheterotroph Habitat • Listeria monocytogenes resides in many birds and in the intestinal tracts of humans, as well as other mammals • Forms colonies in blood

Basic Information • Family: Listeriaceae, order: bacillales • Adaptations: uses flagella to move • Grows in short chains Electron micrograph of a flagellated Listeria monocytogenes bacterium, Magnified 41, 250 X

• It rapidly divides in the cytoplasm of the host cell, causes protrusions in the host cell that enable the bacteria to travel to other nearby cells • Rod-shaped or coccoid • Gram-positive • Endotoxin

Impact on the Environment • Listeria monocytogenes can infect food and if consumed will cause meningitis, encephalitis, or intrauterine infections • It is especially an issue for pregnant women, the elderly, or people with poor immune systems

Wow Facts • The Center for Disease Control estimates that 2, 500 people will become seriously ill with listerosis each year, and 500 of these people will die from it • Listeria monocytogenes is estimated to be carried in the intestinal tract of 5 -10% of the human population without any disease symptoms • Can replicate at 4 degrees C, so it can replicate even in refrigerated foods • Mortality rate for infected people is 20 -30%

Sources • • http: //images. google. com/imgres? imgurl=http: //feww. files. wordpress. com/2010/01/listeriamonocytogenes. jpg&imgrefurl=http: //feww. wordpress. com/2010/01/22/listeria-suspected-cheeserecalled/&usg=__1 b. TW 3 Jzjih 8 K 8 OG 2 EIofq. O 2 EJyw=&h=432&w=400&sz=47&hl=en&start=1&itbs=1&tbnid=K 8 br. Eb. Fj. Bct 1 f. M: &tbnh=126&tbnw=117&prev=/images%3 Fq%3 Dlisteria%2 Bmonocytogenes%26 hl%3 Den%26 safe%3 Dactive%26 gbv%3 D 2%26 tbs%3 Disch: 1 http: //www. sixwise. com/newsletters/06/05/31/6 -types-of-very-common-toxic-bacteria-you-need-to-avoid-and -where-theyre-typically-found. htm http: //www. fda. gov/foodsafety/foodborneillnessfoodbornepathogensnaturaltoxins/b adbugbook/ucm 070064. htm http: //www. textbookofbacteriology. net/Listeria. html http: //emedicine. medscape. com/article/220684 -overview pathmicro. med. sc. edu/ghaffar/zoonoses. htm http: //xbase. bham. ac. uk/colibase/phenotype. pl? search=Facultative