Pathogenic Bacteria

Question 1

Skin & Mucous Membranes
Pyogenic infections
Commensal

Answer 1

Gram Pos. cocci Staphylococcus

Question 2

Secondary infection : pyoderma or otitis externa

Answer 2

Gram Pos. Staphylococcus pseudointermedius

Question 3

Cause of Bovine staphylococcal mastitis
Contagious and subclinical

Answer 3

Gram Pos. Staphylococcus aureus

Question 4

Mucous Membranes
Capsule formation
Commensals

Answer 4

Gram Pos. cocci Streptococcus

Question 5

Causes Strangles in horses (equine distemper)
Vaccine is attenuated live
contagious - purulent extrudates
Lymphnodes swell and occlude airway

Answer 5

S. equi subsp. Gram Pos. Streptococcus

Question 6

Causes Streptococcal Mastitis (chronic v acute)

Answer 6

Gram + cocci
S. agalctiae (chronic)
S. dysgalactiae (acute)

Question 7

Psychrophilic
Facultative Intracellular - can exist inside macrophages

Answer 7

Gram Pos. Bacilli

Question 8

Causes circling and silage disease
Abortions
Septicemia
Encephalitits **

Answer 8

Gram Pos. Bacilli Listeriosis (Listeria monocytogenes)

Question 9

Tonsils and Intestines (50% pigs are asymptomatic carriers)
Four Syndromes - arthritis, septicemia, endocarditis and dermopathy
Causes Diamond Skin

Answer 9

Gram Pos. Bacilli Erysipelothrix rhusiopathiae

Question 10

Commensal
Soil and Mucous Membranes
Falcultative Intracellular - avoids Macrophages
Causes casseous lymphadenitis - abcessation and enlargement

Answer 10

Gram Pos. Bacilli Corynebacterium pseudotuberculosis

Question 11

Causes Anthrax - Fatal
aerobic and anaerobic
Obligate mammalian pathogen - endospore forming
bacillus anthracis capsule - tripartite toxin
Causes acute septicemia in ruminants
Animals must be incinerated on spot post-mortem

Answer 11

Gram Pos. Bacilli Bacillus anthracis

Question 12

Causes Clostridium, Tetanus (tetanospasmin) and Botulism (pre-formed neurotoxin)
obligate anaerobes - toxin and endospore producers
Soil and GI tract (feces)

Answer 12

Gram Pos. Bacilli Anaerobes

Question 13

Enterobacterales - coliform bacteria
Important major pathogens
Oppurtunsitic pathogens

Answer 13

Gram Neg. Rods/Bacilli

Question 14

Causes neonatal colisepticemia, toxemia and Coliform mastitis
Present wherever there is feces
Commensal and oppurtunisitc pathogen

Answer 14

Gram Neg. Bacilli E.coli

Question 15

Causes Salmonella
serotypes in feces
Zoonotic
Subclinical and latent carriers

Answer 15

Gram Neg. S. enetrica subsp.

Question 16

Causes Brucellosis
Abortions most common
survives within macrophages
affects repro organs (m&f)
Zoonotic - raw dairy products

Answer 16

Gram Neg. Brucella spp.
(B. abortus, melitensis, canis and suis)

Question 17

Causes Kennel Cough
Co-infection w/ Adenovirus
Atrophic rhinitis in Pigs

Answer 17

Gram Neg. Bordetella bronchiseptica

Question 18

Prokaryotes with endoflagella for motility
Spiral shape

Answer 18

Spirochetes

Question 19

Gram neg. Saprophyte and has multiple reservoir animals
Zoonotic and underdiagnosed in St. Kitts

Answer 19

Leptospira & Leptospiral spp. (renal tubules and genital tract)

Question 20

Common in pigs, cattle, dogs and horses
Causes abortions and septicemia / jaundice (liver failure)
In Humans its Zoonotic

Answer 20

Gram Neg. Leptospirosis

Question 21

Ticks as vector
Dogs do NOT have target rash
Fever, lethargy, arthritis etc.
Type of Spirochete

Answer 21

Lymes Disease

Question 22

Smallest free livig prokaryote that LACK A CELL WALL - cannot be stained
Resistant to Penicillin
Causes Mastitis, Contagious bovine pleuropneumoniae and Arthritis
Enzootic pneumonia in Pigs

Answer 22

Mycoplasma

Question 23

Obligate Intracellular
Trasmitted via ticks
Systemic Disease
Canine cyclic thrombocytopenia
Ehrlichiosis
Heartwater (ruminants)

Answer 23

Rickettsiales (Rickeetsia spp. and Ehrlichia spp.)