11824417
Descripción
Test por Med Student , actualizado hace más de 1 año
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Creado por Med Student
hace más de 6 años
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Pregunta 1
Pregunta
The reaction of antibody with a non soluble antigen or an antigen-cated particles result in formation of visible to the eye clumb is called
Respuesta
-
agglutination
-
precipitation
-
neutralization
-
complement fixation test
Pregunta 2
Pregunta
ELlSA makes use of:
Respuesta
-
fluorenlubels
-
enzyme
-
radioactive lubels
-
It is not a labeled immune for...
Pregunta 3
Pregunta
widal from used to.....
Respuesta
-
slide agglutination test
-
tube agglutination
-
CUT
-
lectin pathway
Pregunta 4
Pregunta
Which of the following immunoglobulins may be transferes to the fetus during pregnancy
Respuesta
-
lgG
-
lgM
Pregunta 5
Pregunta
The genus specific name for group A streptococci is
Respuesta
-
streptococcus pneumonia
-
streptococcus viridans
-
streptococcus diphtheria
-
streptococcus pyogenes
Pregunta 6
Pregunta
The main pathogenic factor of corynebacterium diphtheria is
Respuesta
-
an endotoxin
-
an exotoxin
-
a spore
-
a protein
Pregunta 7
Pregunta
The specific prophylaxis of diphtheria is performed by
Respuesta
-
a toxoid
-
a killed vaccine
-
passive transfer at serum
-
a live vaccine
Pregunta 8
Pregunta
Which of the following statement concerning cholera infection is correct?
Respuesta
-
death occurs in 46 weeks exclusion and respiratory failure
-
the disease is marked by microorganism invasion and hemorrhage of large intestine
-
vibrio cholera produce an acute fehrile disease with
-
the disease is rapidly progressive and maybe fatal in 2 days because of bacterial multiplication in the gut and shock
Pregunta 9
Pregunta
Beta lactamase production is a major problem for treatment of infections caused by:
Respuesta
-
Corynebacterium diphtheria
-
Neisseria meningitides
-
Staphylococcus aureus
-
Treponemapallidum
Pregunta 10
Pregunta
HIV has been shown to be transmitted by one of the following except
Respuesta
-
Sexual contact
-
Perinatal infection
-
Mosquitos
-
Blood transfer
Pregunta 11
Pregunta
Each organism is identified by two names including:
Respuesta
-
family and kingdom
-
genus and species
-
family and species
-
family and genus
Pregunta 12
Pregunta
[blank_start]Simple[blank_end] techniques of staining make use of only one dye,where as [blank_start]Complex[blank_end] staining a combination of dyes?
Respuesta
-
Simple
-
Complex
Pregunta 13
Pregunta
The volutine granules of corynebacterium diptheria are visualized by [blank_start]Neisser[blank_end] Staining
Respuesta
-
Neisser
Pregunta 14
Pregunta
The following structure are located in the cytoplasmic membrane?
Respuesta
-
spore
-
nucleotid
-
ribosomes
-
capsule
Pregunta 15
Pregunta
Based on their cell wall structure bacteria are divided into:
Respuesta
-
gram(+) and gram(-)
-
aerobe and anerobe
-
sphere and spinal
-
cocci and rods
Pregunta 16
Pregunta
Peptidoglycan polymers are found only in:
Respuesta
-
bacterial cell
-
animal cell
-
a,b
-
viruses
Pregunta 17
Pregunta
Flagella are present in every bacterium
Respuesta
- True
- False
Pregunta 18
Pregunta
Sporulation appears to be
Respuesta
-
an initiation of the bacterium cell
-
a reaction to conditions that are unfavorable for normal growth
-
a status to resist desiccation and other harmful conditions
-
a,b
-
b,c
Pregunta 19
Pregunta
The complete killing or removal of all microorganisms including bacterial spores is called?
Respuesta
-
sterilization
-
disinfection
-
antisepsis
-
non is true
Pregunta 20
Pregunta
Cytoplasm contains:
Respuesta
-
storage granules
-
spores
-
capsules
Pregunta 21
Pregunta
Which of following component are not found in the gram negative cell wall?
Respuesta
-
amino acids
-
lipopolysaccharides
-
peptidoglycan
-
teichoic acids
Pregunta 22
Pregunta
Pfeiffer technique of staining makes use of following dye?
Respuesta
-
methylene blue
-
ziehl’s fuchsine
-
neutral red
-
gentian violet
Pregunta 23
Pregunta
Which of the following structure contains genes for enzymes and antibiotic resistance
Respuesta
-
plasmld
-
pilli
-
capsules
-
plasma membrane
Pregunta 24
Pregunta
Which of the following is the most important structure related to microbial attachment to cells
Respuesta
-
flagella
-
plasmid
-
peptidoglycan
-
glycocalix
Pregunta 25
Pregunta
Which of the following is not a gram negative microbe
Respuesta
-
Clostridum perfringes
-
Vibrio cholerae
-
excheriehia
-
bordetella
Pregunta 26
Pregunta
What causes it to be pink
Respuesta
-
pheiffer's fuchsine
-
gram iodine
-
crystale violet
-
neisser
Pregunta 27
Pregunta
Selective media are designed to
Respuesta
-
support the growth of the desires microorganisms
-
inhibit the growth of non-desired microorganisms
-
a+b
-
none of the above
Pregunta 28
Pregunta
Which part of the antibody molecule reacts with the antigenic determinant agent
Respuesta
-
the fab fragment
-
the fe fragment
-
the constant H region
-
the constants
Pregunta 29
Pregunta
The chemical complement pathway is activated by
Respuesta
-
microbial endotoxins
-
antigen-antibody complex
-
microbial proteins
Pregunta 30
Pregunta
All of the following statement about exotoxins are true expect
Respuesta
-
they are produce mainly by gram (+) bacteria
-
they may be neutralized by antitoxins
-
they are proteins
-
they are heat stable at 100*
Pregunta 31
Pregunta
In Solid media bacterial growth is detected by observing
Respuesta
-
appearance of colonies
-
development of pellet
-
development of turbidity
-
a surface membrane
Pregunta 32
Pregunta
The last phase of bacterial growth curve is:
Respuesta
-
log phase
-
lag phase
-
stationary phase
-
phase of decline
Pregunta 33
Pregunta
Which of the following component is not found in the gram(-) cell wall
Respuesta
-
lipopolysaccharide
-
peptidoglycan
-
teichoic acids
-
O antigen
Pregunta 34
Pregunta
The antiseptic is:
Respuesta
-
an antimicrobial agent that can be used on inanimate object
-
an antimicrobial agent that can be used on living tissue
-
an antibiotic
-
an enzyme
Pregunta 35
Pregunta
Klett is a staining procedure for visualizing:
Respuesta
-
spores
-
capsules
-
volutine granules
-
nucleotid
Pregunta 36
Pregunta
All of the following media are differential except:
Respuesta
-
Teilurite agar
-
Eosin-methylene blue agar(Levine)
-
Moller-hiton agar
-
Deoxycholate citrate
Pregunta 37
Pregunta
Immunoprophylaxis of tuberculosis includes:
Respuesta
-
live affenuated vaccine BCG
-
injection of antimycobacterial serum
-
passive transfer of ready made antibodies from sensitized person
-
a toxoid
Pregunta 38
Pregunta
Passive immunization is an application of:
Respuesta
-
small doses of infective agent
-
ready made antibodies, formed by another host in response to artificial immunization or to natural infection
-
toxoids
-
killed vaccines
Pregunta 39
Pregunta
Which of the following statements about exotoxins are true:
Respuesta
-
they are produced mainly by gram(+) bacteria
-
they may be neutralized by antitoxins
-
they are proteins
-
they are heat stable at 100*
Pregunta 40
Pregunta
Which of the following is not a distinctive characteristic of viruses
Respuesta
-
viruses lack the machinery for protein synthesis
-
viruses require living cells for replication
-
viruses replicate by a process of binary fission
-
viral genomes are either DNA or RNA but not both
Pregunta 41
Pregunta
the immune response elicited by Salk’s inactivated polio vaccine is deficient in specific
Respuesta
-
secretory lgA
-
serum IgA
-
serum lgM
-
IgG
Pregunta 42
Pregunta
All of the following are characteristics of the human immunodeficiency virus(HIV)expect?
Respuesta
-
it bind to CD4 molecule preferentially
-
it contains gp120 and gp30 envelope proteins
-
it is the causative agent of AIDS
-
it contains DNA within its core
Pregunta 43
Pregunta
Complement fixation test requires
Respuesta
-
dissolved antigen
-
corpusculum antigen
-
antitoxin
-
complement
Pregunta 44
Pregunta
Which of the immunoglobin molecule is pentamenie
Respuesta
-
lgM
-
IgG
-
lgD
-
lgE
-
lgA
Pregunta 45
Pregunta
Resection of the transplanted organ due to preformed antibodies in recipient is defined
Respuesta
-
hyper acute
-
aclerated
-
acute
-
chronic
Pregunta 46
Pregunta
microorganisms can be defined as living creatures so small that are not visible by eye
Respuesta
- True
- False
Pregunta 47
Pregunta
Loffler staining procedure stains bacteria in
Respuesta
-
blue
-
red
-
green
-
yellow
Pregunta 48
Pregunta
Which of the following is not true related to endotoxins
Respuesta
-
are secreted from cells
-
can be linked to meningococcemia
-
produced by gram negative microorganism
-
can cause fever
Pregunta 49
Pregunta
Gram negative bacteria differ from gram(+) organism because they passes?
Respuesta
-
LPC(A)
-
Peptidoglycan
-
Only a cytoplasmic membrane
-
Lipoteichoic acid
Pregunta 50
Pregunta
Most bacteria increase in number through the process of
Respuesta
-
binary fission
-
budding
-
sporulation
-
sexual reproduction
Pregunta 51
Pregunta
The term “growth” when for microorganism refer to
Respuesta
-
increase in cell number
-
production of endospores
-
the age and size of the cell
-
all of the above
Pregunta 52
Pregunta
All of the following statement about bacteria cell division are true except:
Respuesta
-
all bacteria double their number every 1 hour
-
bacterial times are influenced by environmental conditions
-
the two bacterial cells following division are genetically identical, they are ones
-
all the above
Pregunta 53
Pregunta
Bacterial nucleotid consist of
Respuesta
-
no chromosomes
-
one chromosome
-
several chromosome
Pregunta 54
Pregunta
Bacterial capsule can be visual sated by:
Respuesta
-
gram stain
-
loeffler stain
-
klett stain
-
moller stain
Pregunta 55
Pregunta
Lipopolysacharides can be found in large amount in:
Respuesta
-
gram(+) bacterial wall
-
gram (-) bacterial wall
-
both
-
none of above
Pregunta 56
Pregunta
Complex methods for bacterial staining are
Respuesta
-
Loeffler stain
-
Pfefiffer stain
-
Gram stain
-
ZiehI-Neelsen stain
Pregunta 57
Pregunta
Specific identity (serotype) of influenza virus can be accomplished by:
Respuesta
-
hemmagglutination inhibition test
-
neutralization test
-
complement fixation test
-
hemadsorbtion test
Pregunta 58
Pregunta
enlargement of one or both parotid glands in the common clinical manifestation of:
Respuesta
-
measles
-
mumps
-
rubella
-
grippe
Pregunta 59
Pregunta
The initial replication of human poliovirus starts in:
Respuesta
-
pharyngeal and intestinal mucosa
-
blood
-
brain
-
joint
Pregunta 60
Pregunta
In congenital rubella the fetus produce:
Respuesta
-
IgM
-
IgG
-
lgA
-
lgE
Pregunta 61
Pregunta
The most common classification system used in microbiology is binomal and was established by:
Respuesta
-
Pasteur
-
Koch
-
Linnaeus
-
Gram
Pregunta 62
Pregunta
Common pili play role in bacterial;
Respuesta
-
conjugation
-
adherence to surface
-
motility
-
precipitation
Pregunta 63
Pregunta
Endotoxins are:
Respuesta
-
found in gram (+) bacteria
-
found in gram(-) bacteria
-
proteins
-
a structural component of the spore
Pregunta 64
Pregunta
Which of the following techniques allows to start with a single piece of microbial DNA and produce billions of copies in matter of hour
Respuesta
-
PCR
-
ELlSA
-
hybridoma biotechnology
-
IFA
Pregunta 65
Pregunta
Which of the following is the fastest way to kill endospores
Respuesta
-
autoclave at 121*C
-
hot air at 160*C
-
clorox solution
-
filtration
Pregunta 66
Pregunta
Gram positive bacterium is most susceptible to the action of penicillin in the following phase of growth?
Respuesta
-
lag
-
log
-
stationary
-
decline
Pregunta 67
Pregunta
The primary immune response include participation of?
Respuesta
-
IgM
-
lgG
-
lgD
-
lgE
-
lgA
Pregunta 68
Pregunta
The first vaccine was used against:
Respuesta
-
measles
-
tuberculosis
-
hepatitis
-
small pox
Pregunta 69
Pregunta
The alternative pathway of complement activation is:
Respuesta
-
T lymphocytes dependent
-
antibody independent
-
antibody dependent
-
T lymphocytes independent
Pregunta 70
Pregunta
Which of the immunoglobulins mediates the local immunity
Respuesta
-
lgA
-
lgM
-
lgG
-
lgD
-
lgE
Pregunta 71
Pregunta
The formation of pharyngeal pseudomembrane is not indicative for
Respuesta
-
tuberculosis
-
diphtheria
-
whooping
-
gas gangrene
Pregunta 72
Pregunta
The most potent biological toxin known is
Respuesta
-
clastridiumbotidinum exotoxin
-
staphylococcus aureus enterotoxin
-
bacillus cereus toxin
-
clostridium perfringes exotoxin
Pregunta 73
Pregunta
The special staining method used for microscopic diagnosis of tuberculosis
Respuesta
-
Gram
-
Klett
-
Ziehl-Neelsen
-
Moller
Pregunta 74
Pregunta
Cytopathic effect is
Respuesta
-
killing of bacteria by viruses
-
absorption of red blood cells by surface of cultured cells
-
damage of cultured infected cells and associated morphological change
-
antigen-antibody reaction
Pregunta 75
Pregunta
Viruses contain the following type of nucleic acid
Respuesta
-
DNA-single strained
-
DNA double strained
-
DNA or RNA
-
both DNA and RNA
Pregunta 76
Pregunta
Hepatitis B virus is most often transmitted by
Respuesta
-
sexual contact
-
air
-
blood transfusion
-
ticks
Pregunta 77
Pregunta
Varicellazinster virus is a member of
Respuesta
-
hypersnviridae
-
hepadnaviridae
-
retroviridae
-
paenviridae
Pregunta 78
Pregunta
Epstizin Bar Virus is the causative agent of:
Respuesta
-
measles
-
mumps
-
rubella
-
infectious mononucleosis
Pregunta 79
Pregunta
Sabin's vaccine against poliomyelitis is secretory immunity in the intestine
Respuesta
-
a killed vaccine
-
a toxoid
-
monovalent hysosome vaccine
Pregunta 80
Pregunta
Spherical bacteria,arranged in cluster are known as:
Respuesta
-
Staphylococci
-
Streptococci
-
Diplococci
-
Vibrios
Pregunta 81
Pregunta
Which concentration of ethyl alcohol is the most effective one as disinfectant and antiseptic
Respuesta
-
95%
-
70%
-
50%
-
30%
Pregunta 82
Pregunta
Penicillin specifically inhibits:
Respuesta
-
protein synthesis
-
peptidoglyconsynthesis
-
nucleic acid synthesis
-
formation of capsules
Pregunta 83
Pregunta
Conjugation differs from transformation and transduction in that it requires a contact between the donor and the recipient:
Respuesta
- True
- False
Pregunta 84
Pregunta
Which of the following structure is involved in bacterial attachment to cell surface?
Respuesta
-
capsule
-
flagella
-
pilli
-
measurants
Pregunta 85
Pregunta
Bacterial growth medium that contains penicillins:
Respuesta
-
minimal medium
-
selective medium
-
differential medium
Pregunta 86
Pregunta
The antigen-antibody complex activates complement through:
Respuesta
-
classical pathway
-
alternative pathway
-
lectin pathway
Pregunta 87
Pregunta
Complement is
Respuesta
-
an acute phase protein
-
an extracellular microbial factor
-
a manose receptor
-
multicomponent humeral factor trigger enzyme cascade in innate immunity
Pregunta 88
Pregunta
The unit of measurement of bacterial size is:
Respuesta
-
nanometer
-
micrometer
-
millimeter
-
kilobase
Pregunta 89
Pregunta
Bacterial growth curve is generally separated into
Respuesta
-
two distinct phase
-
three distinct phase
-
four distinct phase
-
five distinct phase
Pregunta 90
Pregunta
Resistance to many antibiotics is carried by:
Respuesta
-
R plasmids
-
sex pilli
-
spores
-
capsules
Pregunta 91
Pregunta
Which of the following structures are known to protect bacteria from phago... by white blood cells
Respuesta
-
flagella
-
spores
-
capsules
-
ribosomes
Pregunta 92
Pregunta
Spherical bacteria, arranged in chains are known as:
Respuesta
-
staphylococci
-
streptococci
-
neisseria
-
bacilli
Pregunta 93
Pregunta
Endotoxins are associated with
Respuesta
-
Catalase production
-
Flagella in gram (-) bacteria
-
LPS (lipopolyshoccharide)
-
Capsules in gram (-) bacteria
Pregunta 94
Pregunta
The antigenic typing of salmonella spp detects:
Respuesta
-
D, Vi and H antigens
-
Protein
-
M protein
-
Endotoxin
Pregunta 95
Pregunta
Which of the following test is used to detect delayed type hypersensitivity
Respuesta
-
ASO test
-
CFT
-
Mantoux test
-
None of the above
Pregunta 96
Pregunta
Which are the most important immunoglobulins at the mucosal surfaces
Respuesta
-
IgA
-
lgM
-
lgD
-
lgG
Pregunta 97
Pregunta
Salmonella spp is causative agent of
Respuesta
-
typhoid fever
-
cholera
-
paratyphoid fever
-
bacterial dysentery
Pregunta 98
Pregunta
There are animal reservoirs for:
Respuesta
-
leptosspinosis
-
salmonellosis
-
cholera
-
diphtheria
Pregunta 99
Pregunta
Bacteria could be cultured in artificial nutrient media
Respuesta
- True
- False
Pregunta 100
Pregunta
The mean doubling time for most bacterium is
Respuesta
-
8 hours
-
24 hours
-
20-30 minutes
-
4 weeks
Pregunta 101
Pregunta
Dark field microscopy is usually applied for
Respuesta
-
stained preperations with irreversion cell between cochser
-
unstrained wet preparation with oil between the conduncer and the slide irreverSion
-
unstained wet properations with water between the condenser and the slide
-
ultra thin reactions of tissue
Pregunta 102
Pregunta
Which of the following component contain peptidoglycan?
Respuesta
-
Gram(+) cell walls +F
-
DNA
-
Flagella
-
Cytoplasmic membrane
Pregunta 103
Pregunta
The clorax solution and ethyl alcohol are example of:
Respuesta
-
sterilizing agents
-
disinfection
-
antibiotics
-
base analogs
Pregunta 104
Pregunta
Which immunoglobin contain j chain
Respuesta
-
IgA and lgG
-
lgM and lgA
-
lgG and IgM
-
lgD and lgG
-
lgE
Pregunta 105
Pregunta
Which of the following are DNA viruses?
Respuesta
-
adenoviruses
-
picornviruses
-
paramyxoviruses
-
orthomyoviruses
Pregunta 106
Pregunta
Which one is considered a vireal disease viral
Respuesta
-
herpes simplex type 1
-
herpes simplex type 2
-
rubella vire
-
medual vire
Pregunta 107
Pregunta
Which of the following diagnostic markers persist in the blood stream of HBV infected individuals and is found an (imcatox) of infection
Respuesta
-
HBsAg
-
anti-HAV antibodies
-
H-2
-
none of the above
Pregunta 108
Pregunta
All of the following statement about poliomyelitis are correct except:
Respuesta
-
virus is transmitted mainly in respiratory droplets
-
most disease occur apparent sub-clinical infection
-
persistantviremiafam CNS involvement
-
spinal poliomyelitis involves the anterior born cells of the spinal cord
Pregunta 109
Pregunta
During the incubation period of the HBV infection which of the following viral diagnostic marker is most abundant in blood and is commonly used for diagnosis
Respuesta
-
HBSAg
-
Anti-HAV antibodies
-
Anti-HCV antibodies
Pregunta 110
Pregunta
Influenza virus on RNA virus:
Respuesta
- True
- False
Pregunta 111
Pregunta
Human herpes virus 2 is usually associated with:
Respuesta
-
genital herpes
-
measles
-
rubelia
-
erpes zoster
Pregunta 112
Pregunta
Human immunodeficiency virus belongs to:
Respuesta
-
adenoviridae
-
retroviridae
-
togruviridae
-
poxviridae
Pregunta 113
Pregunta
The presence of low levels lgG but not lgM antibodies to rubella virus in the newborn suggests:
Respuesta
-
congenital infection
-
autoimmune disease
-
presence of maternal antibodies
-
allergy
Pregunta 114
Pregunta
A four fold or greater increase in autoantibody titer,measured by appropriate available viral diagnostic test and performed on serum collected at time of disease onset and 14 days later would:
Respuesta
-
be highly suggestive to the presence of the disease
-
indicate previous infection in healthy person
-
not be sufficient for diagnosis
-
not be informative since the serum specimens were not collected at proper interval of time
Pregunta 115
Pregunta
Current acute HAV infection is best diagnosed by the presence of?
Respuesta
-
HBgcAg
-
anti-HBcsntibodies
-
IgM anti-HAV
-
delta antigen
Pregunta 116
Pregunta
Which of the following microorganisms lack a cell wall
Respuesta
-
ram positive cocci
-
gram negative rods
-
richetsia
-
mycoplasma
Pregunta 117
Pregunta
All of the following statement are characteristics for group A strepcoccus?
Respuesta
-
they are rarely resistaned to paraisitis
-
they produce beta-hemolysis on blood agar
-
they are sensitive to bacitracin
-
they are of the normal environment fiera
Pregunta 118
Pregunta
Herpes virus varicella is a member of (zoster) (varicella zoster virus is member of:
Respuesta
-
herpes viridae
-
poxviridae
-
hepadnaviridae
-
retroviridae
Pregunta 119
Pregunta
Which of the following Viruses cause infection mononucleosis?
Respuesta
-
Herpes simplex 1
-
Epstein-barr-viruses
-
CMV
-
Varicella zoster virus
Pregunta 120
Pregunta
Type 2 hypersensitivity reactions are
Respuesta
-
anaphylactic and atopic
-
comlement-mediated cytolysis
-
immune-complexes mediated
-
cell mediated with participation
Pregunta 121
Pregunta
The causative agent of AIDS is:
Respuesta
-
Human herpes virus
-
Haemophilus influenzae
-
Human papilloma virus
-
HIV
Pregunta 122
Pregunta
Which of the following components contain peptidoglycan?
Respuesta
-
Gram (+) cell walls
-
Gram (-) cell walls
-
DNA
-
Cytoplasmic membrane
Pregunta 123
Pregunta
Risus sardonicus refers to:
Respuesta
-
diphtheria
-
measles
-
tetanus
-
botulism
Pregunta 124
Pregunta
Slide agglutination test detects:
Respuesta
-
microbial antigens
-
unknown
-
viral particles
-
bacterial phagocytosis
Pregunta 125
Pregunta
Protein A is a surface protein covalently bound to most strains of
Respuesta
-
staphylococcus aureus
-
staphylococcus epidermidis
-
streptococcus pyogenes
-
streptococcus viridans
Pregunta 126
Pregunta
Which of the following interferons participate in the .... immune response?
Respuesta
-
interferon alpha
-
interferon beta
-
interferon gamma
Pregunta 127
Pregunta
The microbiological test that is widely used for the diagnosis of staphylococcal
Respuesta
-
Agglutination test type wide
-
Agglutination type ....oneresh
-
ASO
-
CFT
Pregunta 128
Pregunta
Which of the following statements are characteristics for group A streptococci
Respuesta
-
they are rarely resistant to penicillin
-
they produce Beta-hemolysis on blood agar
-
they are sensitive to bacitracin
-
they are part of the normal intestinal flora
Pregunta 129
Pregunta
Which of the following vaccines is of routine use?
Respuesta
-
against smallpox
-
against hepatitis
-
against measles
-
against mumps
Pregunta 130
Pregunta
Which of the following vaccines is not of routine use anymore
Respuesta
-
against smallpox
-
against hepatitis B
-
against measles
-
)against mumps (not* hangislkfarkliysacvpodur)
Pregunta 131
Pregunta
Which are is consider venereal disease virus
Respuesta
-
herpes simplex type 1
-
herpes simplex 2
-
rubella
Pregunta 132
Pregunta
The subspecies group are identified on the basis of
Respuesta
-
arrangement of the bacteria on the preparations
-
their antigen
-
gram staining
-
their growth requirement
Pregunta 133
Pregunta
The main pathogenic factor of clostridium tetani is
Respuesta
-
endotoxin
-
exotoxin
-
spores
-
capsule
Pregunta 134
Pregunta
RIA makes use of:
Respuesta
-
fluorescence labels
-
enzymes
-
radioactive labels
-
it is not labelled immune reaction
Pregunta 135
Pregunta
Which of the following immunoglobulin is the principal immunoglobin in exocrine secretion?
Respuesta
-
lgM
-
lgG
-
lgD
-
IgE
-
IgA
Pregunta 136
Pregunta
The causative agents of tetanus is:
Respuesta
-
clostridium difficile
-
clostridium botulinum
-
clostridium perfingens
-
clostridium tetani
Pregunta 137
Pregunta
The positive coagulase test for staphylococcus aureus is indicated by:
Respuesta
-
character of plasma
-
clotting of plasma
-
formation of red ring
-
beta hemolysis on blood agar
Pregunta 138
Pregunta
This microorganism causes a sexually transmitted disease that can be diagnosed by demonstration of cytoplasmic inclusions in......?
Respuesta
-
Chlamydia atrachomatis
-
Candida albicans
-
Trepomena pfedure
-
Neisseria gonorrhoeae
Pregunta 139
Pregunta
Viridans streptococci:
Respuesta
-
can cause neonatal sepsis
-
are involved in urinary infection in females
-
are the most frequent cause of bacterial endocarditis
-
cause zoonotic disease transmitted to humans primary by contact with animal urine
Pregunta 140
Pregunta
Which of the following statement about microbiological diagnosis of diphtheria is correct
Respuesta
-
Microorganisms are coagulase positive
-
microscopy from culture on lofller’s medium or tallarite agar would reveal characteristic chinede letter formation
-
microorganisms are impossible to be identified by Neisser stain because of their small size
-
microorganisms are delicate and can be cultured only in ell culture
Pregunta 141
Pregunta
Exotoxins play a determinant role in the pathogenesis of each of the following EXCEPT:
Respuesta
-
botulism
-
diphtheria
-
tetanus
-
plaque
Pregunta 142
Pregunta
Influenza virus belongs to:
Respuesta
-
hepado viridae
-
orthomyxoviridae
-
paramyxoviridae
-
hypesviridae
Pregunta 143
Pregunta
Which of the following is the leading cause of post transfusion hepatitis producing the highest frequency of chronic disease
Respuesta
-
hepatitis A virus (HAV)
-
hepatitls B virus (HBV)
-
hepatitis C virus (HCV)
-
hepatitis D
Pregunta 144
Pregunta
Which of the following immunoglobulins has the highest serum level in healthy adults
Respuesta
-
lgA
-
lgM
-
lgG
-
IgE
-
IgD
Pregunta 145
Pregunta
Trepanemapallidum is the causative agent of:
Respuesta
-
typhoid fever
-
plague
-
syphilis
-
tuberculosis
Pregunta 146
Pregunta
The pathogenesis and clinical of primary tuberculosis are characterized by
Respuesta
-
cell mediated response with macrophage and lymphocyte infiltrating the focus of infection
-
a complement mediated immune response
-
a humoral mediated immune response
-
an absence of adaptive immune response
Pregunta 147
Pregunta
Which form of plague is most likely to be transmitted from human to human:
Respuesta
-
typhoidal
-
sylvatic
-
pneumonic
-
ulceroglandular
Pregunta 148
Pregunta
Staphylococci differ from streptococci in:
Respuesta
-
gram reactivity
-
cell diameter
-
acid fast staining
-
catalase production
Pregunta 149
Pregunta
All of the following characteristics of Salmonella typhimurium are true EXCEPT:
Respuesta
-
has a multianimal reservoir
-
is one of the most common causes of enterocolitis
-
ferments lactose
-
is a gram (-), molite, endotoxin bearing rod
Pregunta 150
Pregunta
Which of the following characteristics concerning influenza A virus is correct
Respuesta
-
it can always cause generalized infections
-
it can always cause encephalitis
-
it has the capacity to undergo shift and drift
-
it has nonsegmented negative sense genoma
Pregunta 151
Pregunta
Hepatitis A virus is most often transmitter by
Respuesta
-
sexual contact
-
contaminated food
-
blood transfusion
-
shared needles
Pregunta 152
Pregunta
All of the following statements are characteristic for group A streptococci EXCEPT:
Respuesta
-
they are rarely resistant to Penicillin
-
they produce beta-hemolysis on blood agar
-
they are sensitive to bacitracin
-
they are part of the normal intestinal flora
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