- Hello, Jeff - There is still a big question as to why
the virus acts differently in Mexico. All of the 452 human cases were
asymptomatic. Quite possibly people in Mexico who were exposed to other
flaviviruses like Dengue Fever were semi protected from WNV, in other words
possible existence of cross-reactivity, as a consequence of infection with
other related flaviviruses, both in terms of conferring protection or generating
false positivity.
-
- I tend to think cross relativity with other flaviruses
may be the key here. Although, without case histories and epidemiological
studies we can only speculate at this time.
-
- Patricia Doyle
-
- Mexico - West Nile Virus Infection Surveillance Data
As Of 9-24-3
-
- Source: National Center for Epidemiologic Surveillance
of Mexico website, Resumen Epidemiologica, Thu 25 Sep 2003 [edited] http://www.cenave.gob.mx/von/default.asp?id=43
-
- The following figures are reproduced from the Resumen
Epidemiologica accompanying the Maps of West Nile Virus Activity in Mexico
-
- Cumulative totals - Humans
-
- As of Wed 24 Sep 2003, a total of 452 individuals resident
in 20 of the 32 states have been tested for evidence of West Nile virus
infection. All 452 were asymptomatic and seronegative.
-
- Cumulative totals - Equines
-
- As of Wed 24 Sep 2003, a total of 3919 horses from 19
of the 32 states have been tested for evidence of West Nile virus infection.
Of these animals 984 were seropositive and 2934 seronegative. All these
animals were asymptomatic. In addition, one animal in the state of Nuevo
Leon, which had the highest incidence of seropositive animals, was symptomatic
and died.
-
- Cumulative totals - Birds
-
- As of Wed 24 Sep 2003, a total of 17 086 birds from 8
of the 32 states have been tested for evidence of West Nile virus infection.
Of these birds 63 were seropositive (and considered to be asymptomatic)
and 17 021 were seronegative. In addition, 2 dead birds were seropositive.
-
- Patricia A. Doyle, PhD Please visit my "Emerging
Diseases" message board at: http://www.clickitnews.com/ubbthreads/postlist.php?Cat=&Board=emergingdiseases
Zhan le Devlesa tai sastimasa Go with God and in Good Health
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