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82 Cards in this Set
- Front
- Back
3 types of microbial interaction
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commensalism, parasitism, and mutualism
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what is a normal flora
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an organism that live in or on the body
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how do normal flora benefit humans
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providing vitamins, eliminating toxins, and protect us from highly pathogenic organisms
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what are the types of normal flora
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resident normal flora and transient normal flora
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resident normal flora
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microorganism that live and grow on a particular body site
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transient normal flora
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microorganism that are present on the body for a short period of time
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what are the skin and ears norma flora
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staplycoccus
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what normal flora is the throat
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staphylococcus, streptococcus, anaerobic bact.
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what normal flora is small intestines
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enterococcus and lactobacillus
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what normal flora is the Genital Urinary Tract
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lactobacillus
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Vector
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organism that transfer microorganism from 1 host to another
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Reservoir
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were a micro is found
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Pathogenicity
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the ability to cause a disease
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Virulence
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the severity of a disease
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Complement
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a group of proteins that interact together to kill bacteria
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Cytokins
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a protein that regulate a certain aspect of the immune system
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Inflammation
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is a nonspecific response to injury or infection
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Mast cells
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tissue cells that function and is mediate of inflammation response
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list 5 steps to infect a host with a infection/ bacteria
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reath the host/ transmission, colonize, multiply, evade/survive host defenses, and have a means of harming a host
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list 6 ways to transmit an infection/ bacteria
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insect/animal bite, inhaling, ingestion, injury/trama, direct contact, and indirect contact
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what must a host cell be able to do to survive colonize
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must out complete normal flora for binding sites,not get eliminated from the host,with stand body defenses
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list 3 types of ways a microorganism can invade host tissue
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animal/insect bite, microbial penetration of host tissue, and injury/wound
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majority of the micros multiply successfully cause they are
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facultative intracellular parasites (grow inside cells in the body)
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list 7 ways to survive host defenses
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prevent phagoctosisby wbc, microbial protein is not recognized as being foreign, microbial protein is coated with host protein, intracellular growth, extensive destruction of tissue, antigenic variation, and enzymes degrade antibodies
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list 3 ways of harming a host
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extracellualar enzymes, intracellualar growth, and microbial toxins
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types of microbial toxins
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endotoxin and exotoxin
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exotoxin
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heat sensitve (cannot stand boiling)
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endotoxin
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heat stable (can stand boiling) gram (-) rods, its lipopolysaccharide
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list the types of exotoxin
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AB toxin, pore forming toxin, and Proleolytic toxin
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pore forming toxin
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form pores on the cell membrane result in leakage of cell content and then death
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AB toxin
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A component(toxic) and B component (attaches to target cells)
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Proleolytic toxin
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split or break an import protein in the host they disrupt neurotoxins
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Endotoxin in small doses
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is good for humans it promote fever, produce antibodies, and activate complement
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Endotoxin in large doses
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is bad cause it dont regulate body temp., DIC, vasodilation
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how do you classify a toxin
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cytotoxin, neurotoxin, and enterotoxin
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cytotoxin
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kills cells, degrade cell membrane, form pores on membrane,inhibit protein synthesis
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enterotoxin
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dont kill cells,instead secrete H2O and electrolytes
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neurotoxin
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dont kill cells,instead distrupt neurotransmission
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what is the 3 main defenses against bacteria
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physical barriers, innate immunity, and adaptive immunity
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list 5 physical barriers
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gag reflexes,mucus membrane, tears in eyes, skin, peristalisis
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2 types of adaptive immunity
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humoral immunity and cell mediated immunity
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in innate immunity what is the types of white blood cells
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neutrophiles, macrophages, monocytes, eosinophiles, basophiles, lymphocytes
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neutrophiles
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1st to arrive and polymorphonuclear leukorytes
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eosinophiles
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cytic infection
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monocytes
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circulate in the body and a mononuclear phagocytic cell
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basophiles
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least # of wbc and involved in allergic reaction
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Macrophages
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largest # of wbc and attach to tissue
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Lymphocytes
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involved in adaptive immunity
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list the 3 types of lymphocytes
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T cell (cell mediated immunity)and B cell(humoral immunity)and natural killer
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where do T cells mature at
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in thymus
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where do B cells mature at
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bone marrow and sometimes spleen
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what is the function for natural killer lymphocytes
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to kill viruses, cancer cells, and intracellular pathogens
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Cell mediated immunity
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regulated by T cells and cytokins (regulate certain aspect of immune system)
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Humoral immunity
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production of antibodies
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list the 5 cytokins (cell mediated immunity)
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Chemokins,Hematopoietins,Interleukins,Tumor Narosis factor,Interferon (IFN)
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list the 3 types of Interferon(is a type of cytokin)
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alpha ifn, beta ifn, gamma ifn
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Alpha IFN
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produced by macrophages and monocytes. In contain viral infection so it won’t spread and blocks viral replication and activate natural killer cells (type of lymphocytes, which is involved in adaptive immunity)
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Beta IFN
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produced by fibroblasts (tissue cells) have antiviral activities and regulate several aspects of immune system
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Gamma IFN
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produced by T cells and involved with immune regulation
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T cells have different types what are all of them
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t helper cells, T regulatory cells, T cytotoxic cells, T delayed type hypersensitivity cells
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T helper cells
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stimulate humoral and cell mediated immunity, produce cytokins, HIV kills T helper cells so AIDS patients is exposed to a wide variety of diseases
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T regulatory cells
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deactivate or turn off immune response and also serve as to protect against autoimmune disease
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T cytotoxic cells
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kills virus cells and stimulated by interleukin-2, this is produced by T helper cells
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IgG
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activate bact. and viruses
activate complement neutralizes bact. toxins croses placenta |
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IgM
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polymer of 5 Ig molecules and usually 1st to antibody following the 1st exposure to antigen
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IgA
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occurs as a dimer of 2 Ig molecules and major antibodies in mucsoal secreation
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IgE
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antibodies involved in allergic reaction: mast cells have IgE receptors
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IgD
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least # of immunoglobin and found on surface of b cells and they interact with antigens that triggers activation of b cells
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name the 5 action of antibodies
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interaction with complement, opsonization(enchanced phagocytosis of wbc), neutralization of viruses, neutralization of toxins, and
ADCC |
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chemokins
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attract phagocytes and lymphocytes
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hematopoientins
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regulate and stimulate growth and differentiation of wbc
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interleukins
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produced by mycotes and lymphocytes and they regulate response of other lymphocyts and hematopoietic stem cells
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tumor nacrosis factor
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kills tumor cells and have an important role in inflammation, promote fever and apoptosis
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interferon
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protein with antiviral activities and produced in resp. of viral infection, they were notice 30yrs ago
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what can excessive amount of immune complexes result in
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persisten infection with weak immune response,continued prod. of auto antibodies, ans repeated exposure to an allergy
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what is type 1 immune response
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allergic reation that occur immed. to a person then 2nd exposure to an antigen. mediated by IgE
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what is type 2 immune response
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caused by antibodis to tissue
ex. patient get wrong blood |
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what is type 3 immune response
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caused by antibody-antigen complex. primarily removed by macrophages that are in liver, spleen, and bone marrow. it can accumulate in kidney and joints
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what is type 4 immune response
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mediated by Tdth cells. secrete cytokins that attract lymphocytes, macrophages, and basophls. if a large amount of these can cause tissue damage
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hypersensitivity reaction
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an exasrated immune response and occur in ppl who is exposed to antigen and the 2nd time you have immediate and delayed hypersensitivity
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what are the 2 types of hypersensitvity reaction
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immediate and delayed
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apoptosis
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programmed cell death
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