Infectious Disease Questions 1

8/3/2019 Infectious Disease Questions 1

1/36

Which combination of two organisms is associated withWhich combination of two organisms is associated with

contamination of contact lens solutions andcontamination of contact lens solutions and

conjunctivitis/keratitis?conjunctivitis/keratitis?

sA.A. Staphylococcus aureus--Klebsiella rhinoscleromatisStaphylococcus aureus--Klebsiella rhinoscleromatiss B.B. Pseudomonas aeruginosa--Acanthamoeba spp.Pseudomonas aeruginosa--Acanthamoeba spp.

s C.C. Entamoeba histolytica--Naegleria fowleriEntamoeba histolytica--Naegleria fowleri

s D.D. Streptococcus pyogenes--Pseudomonas cepaciaStreptococcus pyogenes--Pseudomonas cepacia

s E.E. Chlamydia trachomatis--Candida albicansChlamydia trachomatis--Candida albicans


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Which of the following statements is FALSE?Which of the following statements is FALSE?

s A.A. The presence of red cells in amoebaThe presence of red cells in amoeba

(erythrophagocytosis) is diagnostic for Entamoeba(erythrophagocytosis) is diagnostic for Entamoeba

histolyticahistolytica

s B.B. The presence of a thin-walled vesicle on aThe presence of a thin-walled vesicle on a

maculopapular base (dew drop on a rose petal) ismaculopapular base (dew drop on a rose petal) ischaracteristic of Herpes zoster (chicken pox)characteristic of Herpes zoster (chicken pox)

s C.C. The gametocyte stage of Plasmodium falciparum isThe gametocyte stage of Plasmodium falciparum is

infective for humansinfective for humans

s D.D. The infectious form of Giardia lamblia is the cystThe infectious form of Giardia lamblia is the cyst

s

E.E. The presence of rhabditiform larvae in the stool isThe presence of rhabditiform larvae in the stool isdiagnostic for Strongyloides stercoralis infectiondiagnostic for Strongyloides stercoralis infection


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Which of the following statements is characteristic ofWhich of the following statements is characteristic of

Trichinella spiralis infection?Trichinella spiralis infection?

s A.A. A 5-year old boy with perianal itchingA 5-year old boy with perianal itchings B.B. A 28 year old woman with a serpigenousA 28 year old woman with a serpigenous

skin lesion on the bottom of her foot (historyskin lesion on the bottom of her foot (history

of walking barefoot on the beach)of walking barefoot on the beach)

s C.C. A 19 year old man from the CaribbeanA 19 year old man from the Caribbean

with a chronic non-healing skin ulcerwith a chronic non-healing skin ulcer

s D.D. A 45 year old midwesterner withA 45 year old midwesterner with

periorbital swelling, fever, and muscle achesperiorbital swelling, fever, and muscle aches

s E.E. A 24 year old Laotian woman withA 24 year old Laotian woman with

jaundice, no fever, hepatomegaly, andjaundice, no fever, hepatomegaly, and

diarrheadiarrhea


4/36

Which of the following vaccines can beWhich of the following vaccines can be

given to patients with AIDS?given to patients with AIDS?

sA.A. Oral polio (Sabin)Oral polio (Sabin)

s B.B. Oral typhoidOral typhoid

s C.C. Hepatitis B vaccineHepatitis B vaccine

s D.D. Yellow feverYellow fever

s E.E. Varicella-zosterVaricella-zoster


5/36

An 82 year old man who has a 120 pack year historyAn 82 year old man who has a 120 pack year history

presented with a right lower lung lobe infiltrate. Apresented with a right lower lung lobe infiltrate. A

diagnosis of pneumonia was strongly considered and thediagnosis of pneumonia was strongly considered and the

patient was admitted to the hospital. Which of thepatient was admitted to the hospital. Which of the

following etiologic agents is NOT associated with adultfollowing etiologic agents is NOT associated with adultcommunity-acquired pneumonia?community-acquired pneumonia?

sA.A. Streptococcus pneumoniaeStreptococcus pneumoniae

s B.B. Mycoplasma pneumoniaeMycoplasma pneumoniae

s C.C. Chlamydia trachomatisChlamydia trachomatis

s D.D. Hemophilus influenzaeHemophilus influenzae

s E.E. Legionella pneumophilaLegionella pneumophila


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Which of the following is INCORRECTLYWhich of the following is INCORRECTLY

associated with its site of latent infection?associated with its site of latent infection?

sA.A. Herpes simplex virus--neuronHerpes simplex virus--neuron

s B.B. Ebstein Barr virus--neuronEbstein Barr virus--neuron

s C.C. Cytomegalovirus--monocyteCytomegalovirus--monocyte

s D.D. Varicella-zoster--neuronVaricella-zoster--neuron

s E.E. HIV-follicular dendritic cellsHIV-follicular dendritic cells


7/36

A blood donor was screened for hepatitis B infection toA blood donor was screened for hepatitis B infection to

determine whether he would be eligible to be a donor. Whichdetermine whether he would be eligible to be a donor. Which

of the following serologic profiles would be considered safeof the following serologic profiles would be considered safe

and appropriate for donating blood?and appropriate for donating blood?

Anti-HBcAnti-HBc Anti-HBeAnti-HBe Anti-HBsAgAnti-HBsAg HBsAgHBsAg

A.A. ++ -- -- ++

B.B. -- -- ++ --

C.C. ++ -- -- ++

D.D. -- -- -- ++

E.E. -- -- ++ ++


8/36

All of the following provide resistance toAll of the following provide resistance to

infection by Plasmodium spp. EXCEPT:infection by Plasmodium spp. EXCEPT:

A.A. Beta-ThalassemiaBeta-Thalassemia

B.B. Sickle cell anemiaSickle cell anemiaC.C. GiardiasisGiardiasis

D.D. Glucose-6-phosphate dehydrogenaseGlucose-6-phosphate dehydrogenase

deficiencydeficiency

E.E. Absence of Duffy coat antigenAbsence of Duffy coat antigen


9/36

Which of the following combinations isWhich of the following combinations is

responsible for subtype and strain specificityresponsible for subtype and strain specificity

and antigenic shifts and drifts in influenza?and antigenic shifts and drifts in influenza?

A.A. M1 nucleoprotein and gp41M1 nucleoprotein and gp41B.B. gp41 and gp120gp41 and gp120

C.C. Vi antigen and NeuraminidaseVi antigen and Neuraminidase

D.D. Neuraminidase and HemagglutininNeuraminidase and Hemagglutinin

E.E. V factor and X factorV factor and X factor


10/36

All of the following represent CORRECTAll of the following represent CORRECT

associations EXCEPT:associations EXCEPT:

A.A. Hemophilus influenzaeHemophilus influenzae nthi-nonnthi-non

typable strainstypable strains=Cause community-=Cause community-acquired pneumonias and otitis mediaacquired pneumonias and otitis media

B.B. MRSA strains of Staph aureus=MRSA strains of Staph aureus=

resistance to -lactam antibiotics andresistance to -lactam antibiotics and

cephalosporinscephalosporins

C.C. Blastomyces dermatitidis=associationBlastomyces dermatitidis=associationwith inland waterways and beaver damswith inland waterways and beaver dams

D.D. Rocky Mountain Spotted Fever=rashRocky Mountain Spotted Fever=rash

begins on trunk and spreads to face andbegins on trunk and spreads to face and

extremities sparing the tongueextremities sparing the tongue

E.E. Trypanosoma infections-produceTrypanosoma infections-produceWinterbottoms sign, Romanas signWinterbottoms sign, Romanas sign

with the leishmanial form being foundwith the leishmanial form being found

in tissuesin tissues


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All of the following cancer associations areAll of the following cancer associations areCORRECT EXCEPT:CORRECT EXCEPT:

A.A. Clonorchis sinensis--Clonorchis sinensis--

CholangiocarcinomaCholangiocarcinoma

B.B. HTLV-2--Hairy cell leukemiaHTLV-2--Hairy cell leukemiaC.C. HPV 16 and 18--Squamous cellHPV 16 and 18--Squamous cell

carcinoma of cervixcarcinoma of cervix

D.D. Streptococcus bovis--AdenocarcinomaStreptococcus bovis--Adenocarcinoma

of the colonof the colonE.E. Schistosoma mansoni--Squamous cellSchistosoma mansoni--Squamous cell

carcinoma of the urinary bladdercarcinoma of the urinary bladder


12/36

Which of the following pathogens isWhich of the following pathogens is

considered to be the MOST COMMONconsidered to be the MOST COMMON

CAUSE of native valve endocarditis as wellCAUSE of native valve endocarditis as well

as endocarditis associated with IV drug use?as endocarditis associated with IV drug use?A.A. Staphylococcus epidermidisStaphylococcus epidermidis

B.B. Staphylococcus aureusStaphylococcus aureus

C.C. Streptococcus viridansStreptococcus viridans

D.D. Streptococcus mutansStreptococcus mutansE.E. Corynebacterium jeikeiumCorynebacterium jeikeium


13/36

All of the following could be considered anAll of the following could be considered anoccupational risk for a small animal veterinarianoccupational risk for a small animal veterinarian

EXCEPT:EXCEPT:

A.A. Leptospira interrogansLeptospira interrogans

B.B. Yersinia pestisYersinia pestisC.C. Bartonella henselaeBartonella henselae

D.D. Eikenella corrodensEikenella corrodens

E.E. Pasturella multocidaPasturella multocida


14/36

A 35 year old woman has a positive Dick test and aA 35 year old woman has a positive Dick test and a

negative Schick test. This indicates that she hasnegative Schick test. This indicates that she has

A.A. neutralizing antibodies againstneutralizing antibodies against

diphtheriadiphtheriaB.B. neutralizing antibodies against scarletneutralizing antibodies against scarlet

feverfever

C.C. a defect in cellular immunitya defect in cellular immunity

D.D. had rheumatic fever as a childhad rheumatic fever as a child

E.E. previously had the full complement ofpreviously had the full complement of

DPT shots as a childDPT shots as a child


15/36

An American Indian living in the Sonoran desert inAn American Indian living in the Sonoran desert in

Arizona presents with ARDS (adult respiratoryArizona presents with ARDS (adult respiratory

distress syndrome). You suspect that the reservoir ofdistress syndrome). You suspect that the reservoir of

this infection is a/an:this infection is a/an:

A.A. wild pigwild pigB.B. skunkskunk

C.C. batbat

D.D. deer mousedeer mouse

E.E. goatgoat


16/36

All of the following are associated with handling orAll of the following are associated with handling or

ingesting poorly cooked or raw seafood or shellfishingesting poorly cooked or raw seafood or shellfish

EXCEPT:EXCEPT:

A.A. Bacillus anthracisBacillus anthracis

B.B. Erysipelothrix rhusiopathiaeErysipelothrix rhusiopathiae

C.C. Pleisomonas shigelloidesPleisomonas shigelloides

D.D. Vibrio parahemolyticusVibrio parahemolyticus

E.E. Diphyllobothrium latumDiphyllobothrium latum


17/36

In which of the following diseases is XersiniaIn which of the following diseases is Xersiniaenterocolitica MORE LIKELY to be the primaryenterocolitica MORE LIKELY to be the primary

pathogen rather than Pseudomonas aeruginosa?pathogen rather than Pseudomonas aeruginosa?

A.A. Malignant otitis externaMalignant otitis externa

B.B. Hot tub folliculitisHot tub folliculitisC.C. Reactive arthritis (HLA-B-27)Reactive arthritis (HLA-B-27)

D.D. Pneumonia in a cystic fibrosis patientPneumonia in a cystic fibrosis patient

E.E. Third degree burn infectionsThird degree burn infections


18/36

Which of the following could potentially beWhich of the following could potentially be

transmitted at the same time as the pathogentransmitted at the same time as the pathogen

responsible for babesiosis?responsible for babesiosis?

A.A.

Rocky Mountain Spotted feverRocky Mountain Spotted fever

B.B. Colorado tick feverColorado tick fever

C.C. Scrub typhusScrub typhus

D.D. Lymes diseaseLymes disease

E.E. Q-feverQ-fever


19/36

A 7 year old boy complains of general malaise andA 7 year old boy complains of general malaise and

loss of appetite. He has a low grade fever and overloss of appetite. He has a low grade fever and overthe past 24 hours, his mother has noted vesicularthe past 24 hours, his mother has noted vesicular

skin lesions on his trunk, some of which areskin lesions on his trunk, some of which are

umbilicated or scabbing over but in different stagesumbilicated or scabbing over but in different stages

of evolution. Which of the following is the MOSTof evolution. Which of the following is the MOST

LIKELY disease in this child?LIKELY disease in this child?

A.A. Varicella-herpes zoster-chicken poxVaricella-herpes zoster-chicken pox

B.B. Human Herpes virus 6 (exanthemHuman Herpes virus 6 (exanthem

subitum-roseola)subitum-roseola)

C.C. German measles (Rubella)German measles (Rubella)D.D. Measles (Rubeola)Measles (Rubeola)

E.E. Rocky Mountain Spotted FeverRocky Mountain Spotted Fever


20/36

This patient has been camping and now presentsThis patient has been camping and now presents

with an annular, erythematous lesion with an area ofwith an annular, erythematous lesion with an area of

central clearing. She also has arthralgias,central clearing. She also has arthralgias,

headache, fever, and chills. Without treatment, thisheadache, fever, and chills. Without treatment, this

patient is at risk for developing:patient is at risk for developing:A.A. gastroenteritisgastroenteritis

B.B. osteomyelitisosteomyelitis

C.C. arthritisarthritis

D.D. jaundicejaundiceE.E. renal failurerenal failure


21/36

Match the following clinical facts with the appropriateMatch the following clinical facts with the appropriate

etiologic agent or diseaseetiologic agent or disease

A.A. Mycoplasma pneumoniaeMycoplasma pneumoniaeB.B. Campylobacter jejuniCampylobacter jejuni

C.C. Enterohemorrhagic E. coli (EHEC)Enterohemorrhagic E. coli (EHEC)

D.D. Capnocytophaga canimorsusCapnocytophaga canimorsus

E.E. Ureaplasma urealyticumUreaplasma urealyticum

A disease which produces life-threatening disease inA disease which produces life-threatening disease in

immunocompromised patients. Fever is the most commonimmunocompromised patients. Fever is the most common

presenting symptom. The organism is part of the normal florapresenting symptom. The organism is part of the normal flora

of healthy dogs and cats and is transmitted to humans viaof healthy dogs and cats and is transmitted to humans via

saliva.saliva.


22/36


etiologic agent or diseaseetiologic agent or diseaseA.A. Mycoplasma pneumoniaeMycoplasma pneumoniae

B.B. Campylobacter jejuniCampylobacter jejuni




Organism associated with hemorrhagic enterocolitis andOrganism associated with hemorrhagic enterocolitis and

hemolytic-uremic syndrome. A non-invasive diarrhea.hemolytic-uremic syndrome. A non-invasive diarrhea.


23/36


etiologic agent or diseaseetiologic agent or diseaseA.A. Mycoplasma pneumoniaeMycoplasma pneumoniae

B.B. Campylobacter jejuniCampylobacter jejuni




The most common cause of invasive bacterial enterocolitis inThe most common cause of invasive bacterial enterocolitis in

the U.S. Occurs in young children and young adults. It causesthe U.S. Occurs in young children and young adults. It causes

crypt abscesses and ulcers in the small bowel and colon.crypt abscesses and ulcers in the small bowel and colon.


24/36


etiologic agent or diseaseetiologic agent or disease

A.A. Mycoplasma pneumoniaeMycoplasma pneumoniae

B.B. Campylobacter jejuniCampylobacter jejuniC.C. Enterohemorrhagic E. coli (EHEC)Enterohemorrhagic E. coli (EHEC)



Patient presents with flu-like synptoms. There is extensivePatient presents with flu-like synptoms. There is extensive

consolidation in the right lung. Chest x-ray shows interstitialconsolidation in the right lung. Chest x-ray shows interstitial

pneumonia with plate-like atelectasis on lateral plate film. Thepneumonia with plate-like atelectasis on lateral plate film. The

patient also has bullous myringitis, erythema multiform,patient also has bullous myringitis, erythema multiform,

sinusitis, and exudative pharyngitis.sinusitis, and exudative pharyngitis.

An organism that causes genito-urinary tract disease includingAn organism that causes genito-urinary tract disease including

non-gonococcal urethritis.non-gonococcal urethritis.


25/36

Match the following Mycobacterial species with the BESTMatch the following Mycobacterial species with the BEST

CLINICAL DESCRIPTION.CLINICAL DESCRIPTION.

A.A. Mycobacterium avium-intracellulareMycobacterium avium-intracellulareB.B. Mycobacterium leprae (lepromatous)Mycobacterium leprae (lepromatous)

C.C. Mycobacterium marinumMycobacterium marinum

D.D. Mycobacterium fortuitum-chelonaeMycobacterium fortuitum-chelonae

E.E. Mycobacterium leprae (tuberculoid)Mycobacterium leprae (tuberculoid)

Positive lepromin skin reaction in a patient withPositive lepromin skin reaction in a patient with

autoamputation of the digits of the handsautoamputation of the digits of the hands

Non-photochromogen associated with Whipple-like syndromeNon-photochromogen associated with Whipple-like syndrome

in a patient with AIDSin a patient with AIDS


26/36

Match the following Mycobacterial species with the BESTMatch the following Mycobacterial species with the BEST

CLINICAL DESCRIPTION.CLINICAL DESCRIPTION.

A.A. Mycobacterium avium-intracellulareMycobacterium avium-intracellulare

B.B. Mycobacterium leprae (lepromatous)Mycobacterium leprae (lepromatous)C.C. Mycobacterium marinumMycobacterium marinum

D.D. Mycobacterium fortuitum-chelonaeMycobacterium fortuitum-chelonae

E.E. Mycobacterium leprae (tuberculoid)Mycobacterium leprae (tuberculoid)

Photochromogen causing swimming pool or fish tank granulomasPhotochromogen causing swimming pool or fish tank granulomas

which lack caseationwhich lack caseation

No granulomas, macrophages filled with organisms predominate;No granulomas, macrophages filled with organisms predominate;

produces symmetrical skin lesions with leonine facies; Grentz zoneproduces symmetrical skin lesions with leonine facies; Grentz zone

Organisms produce post-survical and post-traumatic woundOrganisms produce post-survical and post-traumatic woundinfections and pulmonary disease; most patients are females overinfections and pulmonary disease; most patients are females over

50 years of age50 years of age


27/36

Which of the following pathogens isWhich of the following pathogens isEASILY identified with a standard gramEASILY identified with a standard gram

stain or Brown-Hobbs gram stain?stain or Brown-Hobbs gram stain?

A.A. Legionella pneumophilaLegionella pneumophilaB.B. Pneumocystis cariniiPneumocystis carinii

C.C. Chlamydia pneumoniaeChlamydia pneumoniae

D.D. Nocardia asteroidesNocardia asteroides

E.E. Mycoplasma pneumoniaeMycoplasma pneumoniae


28/36

Which of the following combinations of twoWhich of the following combinations of two

organisms cause travelers diarrhea?organisms cause travelers diarrhea?

A.A. Cytomegalovirus--RotavirusCytomegalovirus--Rotavirus

B.B. Shigella flexneri--Helicobacter pyloriShigella flexneri--Helicobacter pylori

C.C. Rotavirus--Enterotoxigenic E. coliRotavirus--Enterotoxigenic E. coli

D.D. Salmonella enteriditis--Vibrio choleraSalmonella enteriditis--Vibrio cholera

E.E. Staphylococcus aureus--ClostridiumStaphylococcus aureus--Clostridium

botulinumbotulinum


29/36

Which of the following diseases has a pathogenesisWhich of the following diseases has a pathogenesis

that is different from the other diseases listed?that is different from the other diseases listed?

A.A. Post-streptococcal glomerulonephritisPost-streptococcal glomerulonephritis

B.B. Scalded Skin syndromeScalded Skin syndrome

C.C. Toxic Shock SyndromeToxic Shock SyndromeD.D. DiphtheriaDiphtheria

E.E. CholeraCholera


30/36

Which of the following diseases has aWhich of the following diseases has apathogenesis other than traumaticpathogenesis other than traumatic

implantation?implantation?

A.A. SporotrichosisSporotrichosis

B.B. Clostridium perfringens gasClostridium perfringens gas

gangrenegangrene

C.C. Herpetic whitlowHerpetic whitlow

D.D. Clostridium tetaniClostridium tetaniE.E. CysticerosisCysticerosis

A 5 year old girl presents to your office with mild respiratoryA 5 year old girl presents to your office with mild respiratory


31/36

A 5 year old girl presents to your office with mild respiratoryA 5 year old girl presents to your office with mild respiratory

symptoms, joint pain and malaise and a confluent rash on hersymptoms, joint pain and malaise and a confluent rash on her

cheeks that looks like she has been slapped. All of thecheeks that looks like she has been slapped. All of the

following are true in this case EXCEPT:following are true in this case EXCEPT:

A.A. The causative organism is a RNA virusThe causative organism is a RNA virusbelonging to the Togavirus groupbelonging to the Togavirus group

B.B. The causative organism is a single strandedThe causative organism is a single stranded

DNA virus belonging to the Parvovirus groupDNA virus belonging to the Parvovirus group

C.C. This disease is called erythema infectiosum orThis disease is called erythema infectiosum or

Fifths diseaseFifths diseaseD.D. This organism may cause an aplastic anemiaThis organism may cause an aplastic anemia

crisis in patients with chronic hemolyticcrisis in patients with chronic hemolytic

anemiaanemia

E.E. If a pregnant mother acquires this infection,If a pregnant mother acquires this infection,

the fetus may become infected and developthe fetus may become infected and developanemia and hydrops fetalisanemia and hydrops fetalis

Wh h f h f ll l d b l d


32/36

Which of the following organisms listed below are associatedWhich of the following organisms listed below are associated

with food poisoning secondary to ingestion of preformedwith food poisoning secondary to ingestion of preformed

toxins?toxins?

1.1. Staphylococcus aureusStaphylococcus aureus

2.2. Salmonella enteriditisSalmonella enteriditis

3.3. Clostridium botulinum (infant)Clostridium botulinum (infant)

4.4. Bacillus cereusBacillus cereus

5.5. Clostridium perfringensClostridium perfringens

6.6. Clostridium botulinum (adult)Clostridium botulinum (adult)

A.A. 1-3-41-3-4

B.B. 2-3-52-3-5

C.C. 1-4-61-4-6

D.D. 1-2-5-61-2-5-6

E.E. 1-3-4-61-3-4-6


33/36

Non-invasive diarrhea would MOST LIKELYNon-invasive diarrhea would MOST LIKELYbe due tobe due to

A.A. Mycobacterium tuberculosisMycobacterium tuberculosis

B.B. Salmonella typhiSalmonella typhi

C.C. Entamoeba histolyticaEntamoeba histolytica

D.D. Vibrio choleraVibrio cholera

E.E. Shigella flexneriShigella flexneri


34/36

A 5 year old boy has been scratching and picking forA 5 year old boy has been scratching and picking for

several days around his anus. His mother calls yourseveral days around his anus. His mother calls your

office and you instruct her to place some scotch tapeoffice and you instruct her to place some scotch tapeon his anus at night, remove it the followingon his anus at night, remove it the following

morning, and bring it to your office for microscopicmorning, and bring it to your office for microscopic

examination. What is the most likely pathogenexamination. What is the most likely pathogen

causing these symptoms?causing these symptoms?A.A. Giardia lambliaGiardia lamblia

B.B. Ascaris lumbricoidesAscaris lumbricoides

C.C. Enterobius vermicularisEnterobius vermicularis

D.D. Trichuris trichuriaTrichuris trichuriaE.E. Taenia saginataTaenia saginata


35/36

A child has just returned from a week long camp andA child has just returned from a week long camp andhas multiple crusted bullous lesions on his face. Hehas multiple crusted bullous lesions on his face. He

has been scratching and picking the lesions whichhas been scratching and picking the lesions which

has caused them to spread. The organism whichhas caused them to spread. The organism which

causes this lesion in 80% of the cases is:causes this lesion in 80% of the cases is:A.A. Staphylococcus epidermitisStaphylococcus epidermitis

B.B. Staphylococcus saprophyticusStaphylococcus saprophyticus

C.C. Bacillus cereusBacillus cereus

D.D. Staphylococcus aureusStaphylococcus aureusE.E. Streptococcus pyogenesStreptococcus pyogenes


36/36

A patient works in a sheep and cattle hide tanningA patient works in a sheep and cattle hide tanning

factory. He presents to your office with a localizedfactory. He presents to your office with a localized

skin lesion having a central black eschar surroundedskin lesion having a central black eschar surrounded

by nonpitting edema. The cause of this infection isby nonpitting edema. The cause of this infection is

MOST LIKELY a...MOST LIKELY a...

A.A. Gram positive rodGram positive rod

B.B. Gram negative rodGram negative rod

C.C. Gram negative rodGram negative rod

D.D. Gram positive coccusGram positive coccusE.E. SpirocheteSpirochete

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Infectious Disease Questions 1