Download - CORRELATION BETWEEN HUMAN VIRAL CONTAMINATION AND PHYSICOCHEMICAL PROFILES IN A SURFACE WATER LAGOON
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CORRELATION BETWEEN HUMAN VIRAL CORRELATION BETWEEN HUMAN VIRAL CONTAMINATION AND CONTAMINATION AND
PHYSICOCHEMICAL PROFILES IN A PHYSICOCHEMICAL PROFILES IN A SURFACE WATER LAGOONSURFACE WATER LAGOON
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Célia Regina Monte [email protected]
Laboratório de Virologia Aplicadawww.lvapli.ufsc.br
Universidade Federal de Santa Catarina, Brasil
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Peri Lagoon: Florianópolis, Santa Catarina, Brazil
Surface area of 5.7 km²
Water is distributed to the inhabitants (110,000 people)
Recreational activities are allowed in the lagoon
More than 2,000 visitors/spring and summer seasons
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Gastroenteritis, diarrhea, and other diseases can be caused by
viruses transmitted by fecal/urino-oral route
HAdV – RVA – HAV - JCPyV
Introduced into aquatic environments by
human – industrial and agricultural activities
Studies indicate these viruses as bioindicators of environmental contamination
Introduction
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Evaluate the presence of HAdV, JCPyV, HAV and RVA in the largest source of drinking
water of the city of Florianópolis, Santa Catarina,
Brazil (Peri Lagoon);
Investigate their correlation to the water’s
physicochemical parameters and seasonal distribution of
these viruses;
Evaluate the integrity and infectivity of detected HAdV.
Objectives
Site 1: Center of the lagoon
Site 2: Preserved environment
Site 3: Degraded environment
Site 4: Where water is collected for treatment and human consumption and also recreational activities
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Enzymatic Assay (Integrity)
Plaque Assay and ICC-et-RT-qPCR (Infectivity)
Methods
HAdV
Font: googleimagens
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HAdV JCPyV HAV RVA0
20
40
60
80
100
Winter Spring Summer Autumn
Vir
al D
istr
ibu
tio
n /
Seaso
n
(%)
1.01000
1.01002
1.01004
1.01006
1.01008
1.01010HAdV
RVA
JCPyV
HAV
Virus: Water Lagoon
Gen
ome
copi
es p
er li
ter
(GC
/L)
(log
10)
95.83% - HAdV (46/48)
64.5% - RV-A (31/48)
20.83% - JCPyV (10/48)
12.5% - HAV (6/48)
• Viral Distribution• The seasonal distribution
Results
Site 1: Center of the lagoon
Site 2: Preserved environment
Site 3: Degraded environment
Site 4: Where water is collected for treatment and human consumption and also recreational activities
Winter: HAdV – HAV - RVA
Summer and Spring: JCPyV
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Positive Correlation JCPyV x Nitrite Lagoa do Peri
Jun/1
0
Jul/1
0
Aug/10
Sep/1
0
Oct/1
0
Nov/10
Dec/1
0
Jan/11
Feb/11
Mar
/11
Apr/11
May
/11
1.0100
1.0101
1.0102
1.0103
1.0104
1.0105
1.0106
1.0107
0.0
0.1
0.2
0.3
0.4
NitriteJCPyV
**
JC
Py
V G
C/L
Nitrite (u
g/L
)
Correlation: Virus and physicochemical parameters
Results
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Jun/1
0
Jul/1
0
Aug/10
Sep/1
0
Oct/1
0
Nov/10
Dec/1
0
Jan/1
1
Feb/1
1
Mar
/11
Apr/11
May
/11
1.0100
1.0102
1.0104
1.0106
1.0108
Viability (PFU/L) - PATreated (GC/L)
Untreated (GC/L) Viability (CG/L) - ICC-et-RT-qPCR
HA
dV
Integrity and viability of detected HAdV
HAdV: Undamaged: 83.3% (10/12)
Viability by PA: 66.6% (8/12)
Viability by ICC-et-RT-qPCR 83.3% (10/12)
Results
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Surface water sources used for human consumption and recreational activities are being
contaminated by human enteric viruses;
The divergence among total genomic copy number, genomic copies of intact virus and
the number of infectious viruses highlights the importance of including molecular and
cell culture techniques during the environmental monitoring of viruses;
ICC-et-RT-qPCR assay was sensible and, fast to detect viral particles infectious (viral
mRNA) in water samples;
Emphasizes the urgency of monitoring and implementation efficient methods for
removing viral.
Conclusions
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Financial support:
CNPq Project 470808/2009-8
CTAgro/CNPq/- 25/2010
CAPES: Process : AEX 11419/12-1
Team:
Gislaine Fongaro, MSc studentMariana de Almeida do Nascimento, MSc studentAline Viancelli, PhDDenise Tonetta, MScMaurício Mello Petrucio, PhDCélia Regina Monte Barardi, PhD
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[email protected]ório de Virologia Aplicada
www.lvapli.ufsc.brUniversidade Federal de Santa Catarina
Gislaine
Mariana N.
Lucas ElMahdy NatáliaDóris
Camila Vanessa Mariana R.
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