The prevalence of algD was 179(98.3%), toxA 156(85.7%), lasB (179(98.3%), plcH 178(97.8%), plcN 170(93.4%) and exoS 175(96.15%) (Table; Figures 1-6).
aeruginosa inject virulence factors exoS and exoU directly into cytosol of host cell through type III secretion (TTS) system mechanism.18 Current work showed that the prevalence of virulence genes algD, lasB were highest followed by plcH, exoS, plcN and toxA.
aeruginosa isolates carried one to four of the investigated ESBL genes and all were positive for genes of algD, lasB, toxA
and pyocyanin, as shown in Table 5.
lycetti (Davidson, 1851) as representotive toxa
. It is recorded in the Casinos Fm., occurring in the Bifrons-Variabilis chronozones.
The ecfX gene encodes an extra cytoplasmic function sigma factor, which may be involved in haem uptake or virulence , whereas the gyrB gene encodes the DNA gyrase subunit B, a protein which plays a crucial role in the DNA replication process  and toxA
encoding the exotoxin A precursor .
The toxins Ptr ToxA
(Ciuffetti and Tuori, 1999) and SnTox1 (Liu et al., 2003) are produced by P.
(7) Exotoxin A, is encoded by the toxA
gene and inhibits protein biosynthesis.
29TNH10: ria de Arousa, punta de Tragove, 06-III-1996, SANT-Algae 8829; ria de Arousa, Vilanova de Arousa, Tragove, 23-I-1997, SANT-Algae 3732; ria de Arousa, Cambados, San Saturnino, 17-X-1997, SANT-Algae 5896; ria de Arousa, O Grove, A Toxa
, 27-III-1998, SANT-Algae 9842.
Resistance to tan necrosis was thought to be controlled solely by Tsn1, which conditions sensitivity to Ptr ToxA
(see below); however, Friesen et al.
Calvo, 06-03-96, SANT-Algae 7609; Ria de Arousa, O Grove, A Toxa