Pseudomonas Flashcards
What are some general features of Pseudomonas
Saprophytic - Gram -ve/motile/aerobe - Extracellular slime layer - causes blue/green pus - Opportunist - Very resistant to antimicrobials: Intrinsic resistance(due to biofilms) - P. aeroginosa most common
What does Pseudomonas cause
Sheep = Fleet rot (Discolouration) - Mares + cows = abortion/metritis - Dogs = Otitis externa, cystitis, dermatitis, prostitis - Poultry = Septicaemia, dermatitis - Humans = Generalised infections, Biofilms in lungs (Cystic fibrosis patients)
How is Pseudomonas intrinsic antimicrobial resistance
1) Low permeability of outer membrane - 2) Multi-drug efflux pumps - 3) Production of chromosomally encoded Beta-Lactamases - 4) Biofilm
What does Burkholderi mallei cause/ general features
“Glanders” (Farcy) - Nodules/Ulcers in the respiratory tract/skin - Equine/zoonotic - Gram -ve
What are the 3 forms chronic granulomatous disease of Burkholderi mallei
1) Nasal form: Ulcerated mucosa/blood stained nasal discharge - 2) Pulmonary form: Granulomas in lungs - 3) Cutaneous form “Farcy”: corded lymphatics/ulcers/oily pus
What does Burkholderi Pseudomallei cause/general features
Agent of “Meliodosis” - Found in soil - A lot of sublinical infections - typically in sheep, goats, pigs - occasionally in cattle, horse, dogs, cats, humans - Gram -ve
What are the 2 forms of disease of Burkholderi Pseudomallei
1) Acute septicaemia (Mainly in young animals) 2) Chronic abscesses in lungs/liver/lymph nodes
What does Aeromonas hydrophila cause/general features
Gram -ve - effects fish/amphibians/reptiles - causes ulcerative lesions/septicaemia in fresh water fish
What does Aeromonas salmonicida cause/general features
Gram -ve - Causing ulcers in salmon and koi
What are the 7 common features of Respiratory/mucosal pathogens
Gram -ve - Coccbacilli/cocci - Respiratory +/- Reproduction infection - Carriage (Obligate) - Commensals/opportunists - “Stress” > disease - occasionally septicaemias
What are the 10 main respiratory/mucosal pathogens
Pasteurella - Francisella - Bordetella - Moraxella - Legionella - Haemophilus - Histophilus - Actinobacillus - Mannheimia - Bibersteinia
What are the general features of Pasteurella
Commensals, obligate parasites of vertebrates located in the nasopharynx/tonsils - Complex pathogenesis - P. multocida is the most significant - Specific capsular types associated with host-specific diseases
What are the general features of Pasteurella. multocida
Short gram -ve rod with bipolar staining - Doesn’t grow on MCA - Has a odour - Larger capsule = more pathogenic - 5 capsular serogroups - 16 “somatic” serogroups (F is most important for Fowl cholera)
What diseases does Pasteruella. multocida cause/spread
1) Septicaemia pasteurellosis - 2) Fowl cholera - 3) Pneumonic pasteurellosis - 4) Atrophic rhinitis (Pigs) - 5) cat and dog bites (Abscesses + toxic signs) (Zoonosis)
What symptoms of pasteruella. multocida are from Septicaemia pasteurellosis/spread
Haemorrhagic septicaemia (Cattle, buffalo, ect) - Acute septicaemia/Chronic pleuropneumonia (stress of monsoon) - Spreads from upper respiratory tract
What symptoms of pasteruella. multocida are from Fowl cholera
Acute septicaemia (esp turkeys) - chronic URT signs - Stress +/- introduction of virulent strain - Vaccines used
What symptoms of pasteruella. multocida are from Pneumonic pasteurellosis
Bronchopneumonia, often secondary to viral infections
What symptoms of pasteruella. multocida are from Atrophic rhinitis
type D > toxins if Bordetella bronchiseptica is present
What is “shipping fever” caused from Mannheimia haemolytica
Bovine respiratory disease complex - Causes secondary pneumonia following a primary viral infection (Bovine Herpes virus, BVD ect) - Can be induced via stress
What are some of the general features of Mannheimia haemolytica
Indole negative - weak growth on MCA - Beta haemolysis due to leukotoxin - Vaccine available
What disease is caused from Bibersteinia trehalosi
Pneumonic pasteurellosis of sheep (5-11 months old)
What Actinobacillus spp is host specific to swine
A. pleuropneumoniae (APP)
What are some general features of Actinobacillus. pleuropnemoniae
Hemolytic Gram -ve - capsulated - coccobacillary rod - highly host specific for swine - strains vary in virulence and pathogenicity
What disease is caused from Actinobacillus. pleuropnemoniae and how is it transmitted
Severe/contagious respiratory disease - high morbidity/mortality - transmitted via nose to nose contact - vaccines available - 15 serovars 1.5,7,15 common in Australia
What disease does Actinobacillus. lignieresii cause
Wooden tongue (Cattle) = swollen tongue - inability to eat/drink - drooling/saliva - rapid loss of condition - Ulcers on tongue. Small multiple granulomas “daisy head granules”
What disease does Actinobacillus. equuli cause
Sleepy foal disease = septicaemia/”joint ill” - in pigs septicaemia/arthritis/abortion.
What disease does Actinobacillus. suis cause
septicaemia in sows + litters
What disease does Actinobacillus. seminis cause
Palpable lesions of the epididymis in rams (abscess in balls)
What disease does Francisella tularensis cause
Tick-borne - Acute septicaemia - Tularemia - zoonotic = slow healing ulcer + lymphadenopathy in humans
What cause Fowl coryza in adult poultry/What are the symptoms
Avibacterium paragallinarum - Nasal and eye discharge - Conjunctivitis - swelling of wattles - eedema of the head - Dyspnea - Egg drop - Vaccine available
Who are the 4 first Microbiologist/Bacterialologists
What are the 3 classifications of bacteria
What are the Bacterial DNA
What are the characteristics of Gram -/+ bacteria
Discribe the Gram staning process
What are the functions of Lipoplysaccharides
What is the function/form of the Capsule
What is the function of Pilli - Fimbriae - flagela - and endospore
What are the 2 types of Microbial growth
What is the use of a soild media
What is the use of a liquid media
what is the use of solid + liquid meida nutrients
What is the use of a Routine media
What is the use of a Enrichment media
What are the 3 types of Haemolytic patterns on blood agar plate
What is the use of a Selective media
What are the 3 types of philes when it comes to conditions of growth temp
What arethe 5 types of atmospheres used by bacteria
What are the steps in the Growth of indicidual bacteria cells
What are the 4 stages in logarithmic growth
What are the 2 ways of measurement of bacterial growth
What are the 3 main ways of classification for bacteria and the naming convetions
What is the importance of 16s rRNA indentification
What are the lower taxonomic categories of bacteria