Helicobacter/Clostridia Flashcards

1
Q

______ is associated with acute gastritis and duodenal ulcers in humans

A

Helicobacter pylori

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2
Q

______ has been isolated from gastric mucosa of humans, cats dogs and pigs

A

Helicobacter heilmannii

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3
Q

______ is a common cause of gastric ulcers in ferrets

A

Helicobacter mustelae

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4
Q

______ , ______ , and ______ are from humans and may be clinically important assocaited with diarrhea

A

H. cinaedi
H. canis
H. fennelliae

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5
Q

______ , ______ . and ______ isolated from the bilary tract of rodents and humans play a possible role in cholecystitis and cancer of the gall bladder

A

H. bilis
H. hepaticus
H. pullorum

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6
Q

The ______ genome has been sequenced

A

Helicobacter pylori

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7
Q

______ has been isolated from multpile cases of acute gastritis after gastric endoscopy

A

Helicobacter pylori

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8
Q

______ generates ammonimum ions and CO2 that are responsible for much of the tissue damage in Helicobacter infections

A

Urease enzyme

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9
Q

T/F Helicobacter organisms are highly antibiotic resistant

A

FALSE susceptible to a number of drugs

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10
Q

T/F Clostridium are facultative anaerobes

A

FALSE- they are obligate anearobes

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11
Q

What are the 2 broad types of clostridia?

A

Those that do not actively invade/multiply

Those that do invade and multiply in the tissue

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12
Q

T/F Clostridia that actively invade tissue and multpily are also known as the gas gangrene group

A

True

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13
Q

T/F C. botulinum is an example of a gas gangrene clostridia

A

False, it is a member of the other group

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14
Q

______ and ______ are Clostridia that do not actively invade tissue/multiply rely solely on toxin production at localized sites or in vitro.

A

C. Tetani and C. botulinum

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15
Q

What is the habitat of C. tetani?

A

soil, fecal material, readily found in horse and human feces

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16
Q

T/F There are several serotypes of Clostridium tetani that are significantly important

A

FALSE only the toxin is of clinical significance

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17
Q

______ is the toxin of C. tetani that is responsible for clinical disease

A

Tetanosporin

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18
Q

Tetanosporin block ______ release specifically ______ and ______ at the level of the brainstem and spinal cord

A

neurotransmitter

glycine and gamma-aminobutyric acid

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19
Q

What are the clinical signs associated with tetanosportin?

A

continuous spasms of opposing muscle groups- tentany

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20
Q

T/F once the tetanus toxin binds to gangliosides it is easily reversible

A

FALSE it is almost irreversible and antibody is not effective once it is bound

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21
Q

______ produces local necrosis and thereby stimulates the growth of C. tetani

A

Hemolysin

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22
Q

______ binds to the nueromuscular junction but its function is unknown

A

Non-spasmogenic toxin

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23
Q

Give a brief pathogensis of Clostridium tetani

A

organism/usually the spre form enters would/tissue w/ low oxygen tension

deep wounds usually innoculated w/ contmainating bacteria which cause necrosis in the surrounding tissues, reduce the O2 tension and allow growth/germination of C. tetani

Toxin Spreads along the peripheral nerves or hematogenous and through the lymph

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24
Q

What is ascending tetanus?

A

Term form tetanus toxin affecting those nerves closest to the lesion

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25
What is descending tetanus?
when toxin spreads through the lymph- classic lock jaw nerves affected first are those that are most sensitive- horses and humans usually get this
26
______ use has led to an increase reports of tetanus in calves
elastrator band
27
______ is given to provide immediate passive immunity following and injury followed by or given simultaneously w/ the ______ to prevent tetanus
Antitoxin; toxoid
28
______ is a relatively rare cause of food poisoning in humans, domestic animals and waterfowl
Clostrium botulinum
29
______ was associated with an outbreak in CA w/ intravenous black tar heroin users
Clostridium botulinum
30
______ is relatively common form of botulinum in children
Toxico-infectious botulism OR | infant botulism
31
______ C. botulinum are soil saprophytes and are found in sea sediments, while ______ are obligate parasites of the intestinal tract of mammals and birds and are only found in soil as contaminants
A, B, E, F, G C and D
32
T/F ingestion of the organsim is the cause of botulinum in humans animals
FALSE ingestion of the preformed toxin is the cause of disease
33
______ can be produced in carcasses, improperly cured meats, and especially canned green beans
Clostridium botulinum
34
Infant botulism has been associated with______
Honey
35
What is the disease caused by Clostridium botulinum in horses known as? what causes it?
Forage poisoning, usually via ingestion of rabbit or other animal that is killed during mowing and baled in the hay
36
______ is usually a precurosos to Clostridium botulinum in cattle and sheep
Aphosphorosis
37
What is aphosphorosis?
Animal is deficient in phosphorus and chews bones, can ingest enough toxin to produce botulism- more prevalent in africa/texas areas where soil is deficient in phosphorus
38
______ can be isolated from mink and foxes that feed of OFFAL and fish
Clostridium botulinum
39
______ is a term used to describe clostridium botulinum n birds
Limberneck, ducks/aquatic birds that feed on the bottom of ponds- flaccid paralysis of the neck
40
T/F the botulinum toxin bust by cleaved in order to cause disease
FALSE the ORGANISM bust be lysed to release the toxin
41
Some botulinum toxins take the form of ______ and have to be partially digested with ______ to be activated
prototoxins; trypsin
42
T/F Toxin production in types C and D is phage mediated
True
43
T/F Most of the botulinum toxins are very heat stable
False; they are readily destroyed by boiling 3 min or heating to 80C for 5 minutes
44
Why might there be a recurring of Clostridum botulinum in a broiler house, how does it happen?
Chicken dies, carcass is buried, organism proliferates the carcass is rediscovered by the birds, ingested more die, buried etc
45
Outline the pathogensis of C. botulinum
Toxin absorbed in the blood/lymph carried to the peripheral nervous system, binds to the nueromuscular junction causes paralysis of the cholinergic nerve fibers by blocking the release of AcH causes a flaccid paralysis
46
T/F the more acute the onset of botulism clinical disease the higher the mortality rate
TRUE
47
Botulsim toxin ______ is the most acute and results in the highest mortality rate
Type E
48
______ and ______ are the most common botulinum toxins in the US cases
Type A and E
49
One has to have either the ______ specific for the type of toxin that produces disease or a ______ ______ to produce immunity against multiple toxins
toxoid polyvalent toxoid
50
T/F finding the organism in feed, intestines etc is a definitive diagnosis for Clostridum botulinum
FALSE; need to isolate the toxin, the organism is supportive to diagnosis but dz is caused by the toxin
51
______ ______ is available for human treatment of C. botulinum, response vaires with type of toxin
polyvalent antitoxin
52
______ is the caus eof gas gangrene, fatal toxemias and maliganant edema-like infections in sheep
Clostridium perfinges
53
What are the 4 types of toxins produced by C. perfinges? What is special about them?
alpha, beta, epsilon, iota, they are used to classify the 5 types of C. perfringes, they are proteins that act as enzymes
54
What other toxins do C. perferinges produce?
hyaluronidase, DNase, collagenase, proteinase
55
______ aka ______ is a spordaic casue of sisease in feeder lambs in Caand some western states
Type A; yellow lamb disease
56
______ produced in the small intestine and absorbed causes massive intravascular hemoylsis and capillary damge
Alpha toxin
57
______ has been recognized in recent years as major cause of enteric disease in young piglets,
Clostridium perfringes Type A
58
______ clinical disease can mimic mild E. coli infections and can have an effect on the rate of growth in piglets
Clostridium perfringes type A
59
______ is the a sporadic but highly fatal disease that effects adult cows
Hemorrhagic bowel syndrome (HBS)
60
______ is associated with necrotic enteritis in chickens, characterized by extensive necrosis of the small intestine
Clostridium perferinges Types A, B and C
61
______ has been reported from severe fatal enteritis in sheep recently ans are involved in clostridial enteritis in foals
Clostridium perfringes type A
62
T/F non-toxigenic strains are the most widespread type of C. perfringes
TRUE
63
______ is the cause of wound infections, gas gangrene in humans
Type A
64
T/F Clostridium Type A is easily prevented in piglets and dairy cattle
False, there have been some vaccines approved but they dont work real well apparently
65
______ causes lamb dysentery and hemorrhagic enteritis
Clostridium perfringes Type B
66
______ cases enterotoxemia in calves; hemorrhagic, necrotic eteritis in calevs and lambs, usualyl the most healthy and vigorous animals effected
CLostridium perferinges Type C
67
______ causes enterotoxemia in young piglets 1-5 days old, acute hemorrhagic enteritis w/ high mortality
Clostridium perferinges Type C
68
T/F immunization of sowa against Clostridium pre-farrowing is routine
True
69
______ is responsible for the clinical disease of C> perferinges type C in piglets
Beta toxin
70
Milk and clostrum contain ______ that prevents the inactivation of the beta toxin
Trypsin inhibitors (the toxin normally would be inactivated by trypsin otherwise)
71
______ causes enterotoxemia in sheep otherwise known as overeating disease or pulpy kidney disease, economically significant dz of feeder lambs; usually effecting the healthiest animals
Clostridium perferinges type D
72
______ is the principle toxin of Clostridium perferinges Type D
epsilon toxin- activated via cleavage by trypsin
73
______ this toxin has receptors in the fvascualr endothelium in the brain and produces liquefactive necrosis, edema and hemorrhage
epsilon toxin
74
______ is used to detect toxin genes
PCR
75
______ should be used routinely in lambs to protect against Clostridium
CDT tetanus toxoid
76
______ is the cause of black leg in cattle
Clostrium chauvoei
77
______ is the natural habitat of Clostridium chauvoei
exist in the soil as spores, very resistant
78
______ toxin of C. chauveoi is the lethal, necrotizing and hemolytic
Alpha Toxin
79
______ usually affects cattle 6 months to 2 years of age, usually fat, rapid growing animals, areas of balck, necrotic muscle w/ gas production and crepitation
Clostridium chauveoi
80
Pathogenesis of black leg
theory is that spores are present in the animal naturally they germinate when damage or injury to the tissue causes necrosis and anaerobic conditions
81
______ is most important from vaccination for C. chauvoei
protective antigen, it is against the organsim NOT the toxin
82
T/F penecillin is effective against C. chauvoei
True if given in early stages, locally and systemically
83
______ cause of malignant edema associated with wounds in humans and animals
Clostridium septicum
84
______ may be a secondary infection in black leg and other clostridial infections
Clostridum septicum
85
______ is cause of braxy in sheep, gastroenteritis of carnivores
Clostridium septicum
86
T/F there is no gas production by C. septicum
True
87
T/F C. septicum must be the dominant organism to be considered significant
True- it is a frequent postmortem invader
88
______ is involved in gas gangrene and enterotoxemia, frequently found in mixed infections in cattle, routinely included in "7 way" vaccines
Clostridium sordelli
89
______ is the cause of blacks disease
Clostridium novyi
90
T/F CLostridum novyi is more oxygen sensitive than other clostridia
True
91
______ produces big head in rams that fight and get head wounds, gas gangrene in man and animals
Clostridium novyi Type A
92
______ infectious necrotic hepatitis in sheep and occasionally cattle
Blacks disease- Clostridium novyi type B
93
What is the pathogenesis of Blacks disease
preferably affects best doing animals spores originate in teh intestine, migrate to liver, remian in dormant state in Kupffer cells Liver fluke mirgates through liver and creates favorable environment (necrosis) spores multiply and pdx toxin
94
______ is availble for treatment of outbreaks of C. novyi
hyperimmune serum
95
______ also known as C. novyi type D, causes bacilalry hemoglobinuria or Redwater disease of cattle, deer, elk and sometimes sheep
Clostridium hemolyticum
96
______ is the principle toxin of Redwater disease
Lecithinase C
97
______ is the characteristic lesion associated w/ Redwater disease
large infarct
98
______ is the cause of Tyzzer's disease which is primary problem in laboratory rodents, also a problem in wild muskrats
Clostridium pilliformae
99
______ transmission of these disease in lab animals is most likely due to ingestion of contaminated/dirty bedding
Clostridium pilliformae
100
______ is the cause of quail disease or ulcerative enteritis, seen in a wide variety of wild/domestic avian species
Clostridium colinum
101
______ associated with the production of neonatal diarrhea in pigs, common cause of mesocolonic edema and usually mild to moderate economically significant diarrhea
Clostridium difficile
102
Issues w/ C. difficile in horses
watery diarrhea in foals 2 to 5 days acute colitis in mature horses rarely isolated from non-diarrhea horses
103
______ well recognized as cause of diarrhea in association w/ administration of antimicrobial agents, psuedomembraneous colitis in humans , severe form may be fatal
Clostridium difficile
104
______ and ______ are the two toxins produced by C. difficle
Toxin A- enterotoxin | Toxin B- cytotoxin