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Table 5 Phage-based reduction of biofilms, with or without using adjuvant chemical, in PIA and FnBPA types of both MRSA and SA

From: The potential of bacteriophage cocktail in eliminating Methicillin-resistant Staphylococcus aureus biofilms in terms of different extracellular matrices expressed by PIA, ciaA-D and FnBPA genes

Bacteria

Type of biofilm

Phage application without chemical adjuvant

Phage application with chemical adjuvant

Level of biofilm before: after (score of reduction)

Level of biofilm before: after (score of reduction)

SA-1

PIA

High: high (0)

High: weak (2)

SA-2

PIA

Mod: weak (1)

Mod: zero (2)

SA-3

PIA

weak: zero (1)

weak: zero (1)

SA-10

PIA

weak: zero (1)

weak: zero (1)

SA-5

PIA

High: High (0)

High: weak (2)

SA-6

PIA

weak: zero (1)

weak: zero (1)

ATCC 11987

PIA

Mod: weak (1)

Mod: weak (1)

SA-8

PIA

weak: zero (1)

weak: zero (1)

Average score of reduction

0.75

1.38

SA-9

FnBPA

Mod: Mod (0)

Mod: zero (2)

SA-4

FnBPA

High: high (0)

High: weak (2)

SA-7

FnBPA

weak: weak (0)

weak: zero (1)

ATCC 27691

FnBPA

weak: zero (1)

weak: zero (1)

Average score of reduction

0.25

1.5

MR-4

PIA

Mod: Mod (0)

Mod: zero (2)

MR-5

PIA

High: High (0)

High: weak (2)

MR-7

PIA

weak: zero (1)

weak: zero (1)

Average score of reduction

0.33

1.67

MR-1

FnBPA

High: high (0)

High: zero (3)

MR-2

FnBPA

Mod: mod (0)

Mod: weak (1)

MR-3

FnBPA

High: high (0)

High: weak (2)

MR-6

FnBPA

weak: zero (1)

weak: zero (1)

ATCC 700699

FnBPA

Mod: Mod (0)

Mod: zero (2)

ATCC 43300

FnBPA

High: high (0)

High: mod (1)

Average score of reduction

0.17

1.67

  1. Mod represents moderate production of biofilms, Zero describes mean OD values of TCP method less than 0.01