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Table 1 The estimated colony forming unit and  median lethal concentration (LD50) of pathogenic microorganisms’ antigens and vaccines

From: Application of median lethal concentration (LC50) of pathogenic microorganisms and their antigens in vaccine development

Pathogenic microbes

Animal model

Antigen(s)/Strain

Route

CFU (LC1)

LC50 cfu/ml

Comments

Reference(s)

Staphylococcus aureus

Mice

pC1-Neo

pC1-Neo-MeccA

Intraperitoneal

2.2 × 107

1.1 × 108

Less virulent

[5]

Staphylococcus aureus

Mice

Fibrinogen Fibronectin

Intravenous

2 × 106

1 × 107*

Less virulent

[6]

Staphylococcus aureus

Mice

Endotoxin-free PBS

Intraperitoneal

1 × 108

5 × 108*

Less virulent

[10]

New Castle disease virus

Chicken

Lasota vaccine

Oral

0.84–1.92

4.2–9.6/ml

Very virulent

[11]

New Castle disease virus

Chicken

12 vaccine

Oral

1.14–1.92

5.7–9.6/ml

Very virulent

[11]

Hepatitis A Virus

In vitro

HAV AM75/18F

In vitro

2.8 × 106

1.4 × 107

Less virulent

[12]

Streptococcus pneumoniae

Mice

Pneumococcal surface protein A

Subcut

9 × 104–106

4.5 × 104–106

Moderately virulent

[13]

Streptococcus pneumoniae

Mice

PSPA1 and 2 bound to Vi polysaccharide

Intravenous

2 × 103–2 × 106

104–107

Moderately virulent

[14]

Foot and Mouth Disease virus

In vitro cell line (hamster kidney 21 cell line)

Serotype A, 0 and SAT-2

Cell culture

2.8 × 108

1.4 × 109

Less virulent

[15]

Staphylococcus aureus

Rat

Strain (ATCC29213)

Intraperitoneal

3.5 × 109

1.75 × 1010

Less virulent

[16]

Pseudomonas aeruginosa

Rat

(ATCC27853) strain

Intraperitoneal

6 × 107

3.0 × 108

Less virulent

[16]

Sheep pox virus

Sheep

SPPV strain (Hd 2012)

Intradermal

3.86 × 102

1.93 × 103

Highly virulent

[17]

Edwardsiella ictaluri

Catfish

Suspension of E. ictaluri

Intraperitoneal

5.6 × 103

2.8 × 104

Moderately virulent

[18]

Aeromonas hydrophila

New Zealand rabbit, fish

Glycoprotein based-vaccine

Intradermal

1 × 109

5 × 109

Less virulent

[19]

Aeromonas veronii

Fish mice

Bacteriovorax strain H2

Oral

7.2 × 108

> 109 PFUg−1

Less virulent

[20]

  1. CFU colony forming unit
  2. * = sublethal dose; highly virulent = statistically significant in relation to CFU/viral concentration; moderately virulent-statistically significant in relation to CFU/viral concentrations; Less virulent = statistically not significant in relation to CFU/viral concentrations