<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0009-6725</journal-id>
<journal-title><![CDATA[Ciência e Cultura]]></journal-title>
<abbrev-journal-title><![CDATA[Cienc. Cult.]]></abbrev-journal-title>
<issn>0009-6725</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Brasileira para o Progresso da Ciência]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0009-67252003000300020</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Doenças e seus impactos sobre a biodiversidade]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Catão-Dias]]></surname>
<given-names><![CDATA[José Luiz]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,USP Faculdade de Medicina Veterinária e Zootecnia ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Fundação Parque Zoológico de São Paulo  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A03">
<institution><![CDATA[,Associação Brasileira de Veterinários de Animais Selvagens  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2003</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2003</year>
</pub-date>
<volume>55</volume>
<numero>3</numero>
<fpage>32</fpage>
<lpage>34</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://cienciaecultura.bvs.br/scielo.php?script=sci_arttext&amp;pid=S0009-67252003000300020&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://cienciaecultura.bvs.br/scielo.php?script=sci_abstract&amp;pid=S0009-67252003000300020&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://cienciaecultura.bvs.br/scielo.php?script=sci_pdf&amp;pid=S0009-67252003000300020&amp;lng=en&amp;nrm=iso"></self-uri></article-meta>
</front><body><![CDATA[ <p align="center"><img src="/img/revistas/cic/v55n3/a20img01.gif"></p>     <p>&nbsp;</p>     <p><font size=5><b>D<small>OEN&Ccedil;AS E SEUS IMPACTOS SOBRE A BIODIVERSIDADE</small></b></font></p>     <p><b><font size="3">Jos&eacute; Luiz Cat&atilde;o-Dias</font></b></p>     <p>&nbsp;</p>     <p><font size=5><b>O</b></font><font size="3">s mico-le&otilde;es pretos (<i>Leontopithecus    chrysopygus</i>) s&atilde;o primatas neotropicais originalmente encontrados    na mata atl&acirc;ntica dos estados de S&atilde;o Paulo e Paran&aacute;. Devido    &agrave; constante destrui&ccedil;&atilde;o de seu habitat, esses delicados    animais s&atilde;o considerados uma das esp&eacute;cies de primatas mais amea&ccedil;adas    de extin&ccedil;&atilde;o em todo o mundo (ap&ecirc;ndice I – Cites), sendo    que levantamentos faun&iacute;sticos recentes apontavam a exist&ecirc;ncia de    aproximadamente apenas 900 indiv&iacute;duos em vida livre (1).</font></p>     <p><font size="3">Em dezembro de 1997, uma f&ecirc;mea jovem de mico-le&atilde;o-preto    foi capturada por um fazendeiro nos arredores da cidade de Buri, SP, e encaminhada    a um zool&oacute;gico da regi&atilde;o, onde permaneceu dividindo o recinto    com outros calitriqu&iacute;deos. Poucos meses ap&oacute;s, durante uma visita    t&eacute;cnica ocasional, alguns bi&oacute;logos e veterin&aacute;rios identificaram    o indiv&iacute;duo como sendo um raro exemplar de mico-le&atilde;o-preto. De    posse desta informa&ccedil;&atilde;o, os org&atilde;os competentes pelo manejo    dos <i>Leontopithecus</i> spp determinaram, em agosto de 1998, a transfer&ecirc;ncia    do animal para um outro zool&oacute;gico do interior de SP. Aproximadamente    20 dias ap&oacute;s a transfer&ecirc;ncia, o mico-le&atilde;o-preto apresentou-se    subitamente anor&eacute;xico, prostrado, hipot&eacute;rmico e dispn&ecirc;ico.    Apesar da interven&ccedil;&atilde;o cl&iacute;nica imediata, o animal morreu    em poucas horas. Exames necrosc&oacute;picos, histopatol&oacute;gicos e imunoistoqu&iacute;micos    estabeleceram a causa de morte como sendo toxoplasmose, uma zoonose causada    por um protozo&aacute;rio intracelular obrigat&oacute;rio, o <i>Toxoplasma gondii.</i>    A toxoplasmose &eacute; uma enfermidade transmitida, principalmente, atrav&eacute;s    da ingest&atilde;o de oocistos esporulados presentes nas fezes de gatos dom&eacute;sticos    e algumas esp&eacute;cies de fel&iacute;deos selvagens, os &uacute;nicos hospedeiros    definitivos conhecidos. H&aacute; d&eacute;cadas sabe-se que os primatas neotropicais    em geral, e os <i>Leontopithecus </i>spp em especial, s&atilde;o particularmente    suscet&iacute;veis &agrave; toxoplasmose, com taxas de letalidade pr&oacute;ximas    a 100%. Por outro lado, tamb&eacute;m h&aacute; d&eacute;cadas, sabe-se que    a preven&ccedil;&atilde;o &eacute; a melhor ferramenta para o controle da toxoplasmose    entre platirrinos. </font></p>     <p><font size="3">Em resumo, os esfor&ccedil;os na conserva&ccedil;&atilde;o de    uma esp&eacute;cie criticamente amea&ccedil;ada, renovados pela descoberta de    um indiv&iacute;duo jovem, possivelmente oriundo de um grupo n&atilde;o consang&uuml;&iacute;neo    aos j&aacute; conhecidos, foram subitamente abalados por conta de uma doen&ccedil;a    conhecida e poss&iacute;vel de ser prevenida.</font></p>     <p><font size="3">O relato acima (2) evidencia uma situa&ccedil;&atilde;o que    a cada dia recebe mais aten&ccedil;&atilde;o por parte dos t&eacute;cnicos e    pesquisadores envolvidos na quest&atilde;o conservacionista: o impacto das doen&ccedil;as,    em especial as infecto-parasit&aacute;rias, sobre a preserva&ccedil;&atilde;o    da biodiversidade. O presente texto visa brevemente historiar e abordar alguns    aspectos deste processo, e sinalizar perspectivas futuras.</font></p>     <p><font size="3"><b>ENFERMIDADES E SEU IMPACTO SOBRE A MANUTEN&Ccedil;&Atilde;O    DE ANIMAIS EM VIDA LIVRE E EM CATIVEIRO</b> H&aacute; muito sabe-se que as enfermidades,    em especial as infecto-parasit&aacute;rias introduzidas em um novo habitat,    exercem marcante impacto sobre a manuten&ccedil;&atilde;o da biodiversidade.    Por outro lado, &eacute; relativamente comum pesquisadores conservacionistas    manifestarem ignor&acirc;ncia sobre o efeito catastr&oacute;fico de certas epizootias,    tanto que j&aacute; em 1933 Leopold afirmou que &quot;o papel das doen&ccedil;as    na conserva&ccedil;&atilde;o da vida selvagem tem sido radicalmente subestimado&quot;    (3).</font></p>     ]]></body>
<body><![CDATA[<p><font size="3">Muitos s&atilde;o os relatos dispon&iacute;veis descrevendo    os efeitos das doen&ccedil;as sobre popula&ccedil;&otilde;es de animais em vida    livre, valendo a pena destacar algumas situa&ccedil;&otilde;es de significado    hist&oacute;rico emblem&aacute;tico. </font></p>     <p><font size="3">Durante as expedi&ccedil;&otilde;es do in&iacute;cio do s&eacute;culo    passado para a conquista do p&oacute;lo sul, acredita-se que os c&atilde;es    utilizados para o transporte de tren&oacute;s tenham transmitido o v&iacute;rus    da cinomose canina &agrave;s focas caranguejeiras habitantes das costas da Ant&aacute;rtica,    levando &agrave; ocorr&ecirc;ncia de extensa mortalidade nestes animais (4).    O mesmo v&iacute;rus, dessa vez disseminado por c&atilde;es dom&eacute;sticos    pertencentes a moradores do entorno da regi&atilde;o do Chobe National Park,    Botswana, foi incriminado pela extin&ccedil;&atilde;o do cachorro do mato africano    (<i>Lycaon pictus</i>) naquela regi&atilde;o, em 1991. (5). Por sua vez, a peste    bovina, introduzida na &Aacute;frica setentrional em 1888, disseminou-se rapidamente    pela regi&atilde;o sub-sa&aacute;rica, atingindo a &Aacute;frica do Sul em 1896.    Em seu caminho, a peste bovina causou a devasta&ccedil;&atilde;o de grandes    popula&ccedil;&otilde;es de herb&iacute;voros silvestres, incluindo b&uacute;falos    (<i>Syncerus caffer</i>), elands (<i>Taurotragus oryx</i>), kudus (<i>Tragelaphus    strepsiceros</i>) e gnus (<i>Connochaetes taurinus</i>). Mesmo depois de mais    de um s&eacute;culo, os efeitos s&oacute;cio-econ&ocirc;micos deste processo    s&atilde;o sentidos na &Aacute;frica meridional (6). Recentemente, uma grande    epizootia causada por um flaviv&iacute;rus (<i>West Nile virus</i>), al&eacute;m    de ocasionar o &oacute;bito de mais de uma dezena de pessoas, causou a morte    de milhares de aves selvagens, de m&uacute;ltiplas esp&eacute;cies, em diversos    estados da costa leste e centro-oeste dos Estados Unidos. O significado dessa    mortalidade sobre a avifauna norte-americana ainda est&aacute; para ser descoberta.</font></p>     <p><font size="3">Por outro lado, sabe-se que a ocorr&ecirc;ncia de doen&ccedil;as    exerce uma marcante influ&ecirc;ncia sobre o sucesso ou o fracasso de programas    de manuten&ccedil;&atilde;o de esp&eacute;cies selvagens em cativeiro. Muitos    s&atilde;o os exemplos que sustentam esta afirma&ccedil;&atilde;o. Dentre 48    mortes de gorilas investigadas em diversos zool&oacute;gicos, a maioria sucumbiu    devido &agrave; enterocolite infecto-parasit&aacute;ria, sendo as bact&eacute;rias    <i>Shigella </i>sp. e <i>Salmonella </i>sp<i>., </i>e os parasitas <i>Balantidium    </i>sp. e <i>Strongyloides </i>sp., os mais importantes agentes identificados    (7). O <i>Toxoplasma gondii</i> tem sido incriminado como um dos mais importantes    e devastadores pat&oacute;genos de primatas neotropicais mantidos em cativeiro    (2,8). S&aacute; e colaboradores descreveram um surto de leptospirose em ceb&iacute;deos    rec&eacute;m-capturados da natureza durante enchente de hidroel&eacute;trica    e transferidos para um zool&oacute;gico do interior do estado de S&atilde;o    Paulo (9). O programa de propaga&ccedil;&atilde;o em cativeiro do mico-le&atilde;o-dourado    (<i>Leontopithecus rosalia</i>) sofreu s&eacute;rio abalo quando v&aacute;rios    indiv&iacute;duos morreram por conta da hepatite dos calitriqu&iacute;deos,    uma virose emergente causada por um arenav&iacute;rus de roedor (10). Em levantamento    retrospectivo de 20 anos, as principais causas de morte de 69 guepardos (<i>Acinonyx    jubatus</i>) mantidos em cativeiro na &Aacute;frica do Sul foram revistas, demonstrando-se    que a mais relevante foi a gastrite associada com organismos assemelhados &agrave;    <i>Helicobacter</i> (11).</font></p>     <p>&nbsp;</p>     <p align="center"><img src="/img/revistas/cic/v55n3/a20img02.gif"></p>     <p>&nbsp;</p>     <p><font size="3"><b>DOEN&Ccedil;AS E SEU IMPACTO SOBRE OS PROGRAMAS DE REINTRODU&Ccedil;&Atilde;O    E TRANSLOCA&Ccedil;&Atilde;O</b> Para muitas esp&eacute;cies    de animais criticamente amea&ccedil;adas de extin&ccedil;&atilde;o, uma das    poucas alternativas de sobreviv&ecirc;ncia existente &eacute; a ado&ccedil;&atilde;o    de pr&aacute;ticas intensivas de manejo e movimenta&ccedil;&atilde;o de indiv&iacute;duos,    seja atrav&eacute;s de transloca&ccedil;&otilde;es, seja por meio de propaga&ccedil;&atilde;o    em cativeiro e subseq&uuml;ente reintrodu&ccedil;&atilde;o</font></p>     <p><font size="3">Por&eacute;m, <i>&quot;...</i>a soltura de animais, seja atrav&eacute;s    da transloca&ccedil;&atilde;o de esp&eacute;cimes de uma popula&ccedil;&atilde;o    natural para outra, da introdu&ccedil;&atilde;o de animais nascidos em cativeiro    em uma popula&ccedil;&atilde;o natural ou do retorno de animais reabilitados    &agrave; natureza ap&oacute;s algum tempo em cativeiro, implica em algum n&iacute;vel    de risco de transmiss&atilde;o de doen&ccedil;as&quot; (12).</font></p>     <p><font size="3">Exemplos desse risco est&atilde;o amplamente descritos na literatura    especializada. Castle &amp; Christensen relataram a exist&ecirc;ncia de hematozo&aacute;rios    em perus selvagens translocados no meio-oeste norte-americano, e alertaram para    a possibilidade da introdu&ccedil;&atilde;o de <i>Plasmodium kempi</i> em popula&ccedil;&otilde;es    originalmente isentas (13). Um surto de psitacose, origin&aacute;rio de aves    ornamentais importadas dos EUA, colocou em risco 132 psitac&iacute;deos de um    programa de propaga&ccedil;&atilde;o em cativeiro para posterior reintrodu&ccedil;&atilde;o    nas florestas da Costa Rica (14). Metzer historiou o impacto de algumas doen&ccedil;as    sobre as popula&ccedil;&otilde;es nativas e em programas conservacionistas na    &Aacute;frica meridional (6).</font></p>     <p><font size="3">Existem quatro cen&aacute;rios principais de transmiss&atilde;o    de doen&ccedil;as, associados com programas de reintrodu&ccedil;&atilde;o e    transloca&ccedil;&atilde;o: 1) introdu&ccedil;&atilde;o de uma doen&ccedil;a    nova em um ambiente atrav&eacute;s de um animal selvagem translocado/reintroduzido;    2) transmiss&atilde;o de uma doen&ccedil;a localmente existente na popula&ccedil;&atilde;o    selvagem para animais translocados/reintroduzidos; 3) transmiss&atilde;o de    uma doen&ccedil;a de um animal selvagem translocado/reintroduzido para animais    dom&eacute;sticos existentes na &aacute;rea de soltura; 4) transmiss&atilde;o    de doen&ccedil;as de animais dom&eacute;sticos existentes na &aacute;rea de    soltura para uma esp&eacute;cie selvagem translocada/reintroduzida (15).</font></p>     ]]></body>
<body><![CDATA[<p><font size="3">Apesar do conhecimento desses cen&aacute;rios e dos riscos impl&iacute;citos,    muito pouco se sabe sobre as especificidades de cada situa&ccedil;&atilde;o,    sendo consensual entre os pesquisadores da &aacute;rea que as informa&ccedil;&otilde;es    existentes sobre incid&ecirc;ncia e distribui&ccedil;&atilde;o de doen&ccedil;as    nas popula&ccedil;&otilde;es cativas e, em especial em vida livre, s&atilde;o    insuficientes (12). Al&eacute;m disso, a freq&uuml;&ecirc;ncia com que o monitoramento    m&eacute;dico-veterin&aacute;rio &eacute; efetuado durante transloca&ccedil;&atilde;o/reintrodu&ccedil;&atilde;o    de animais selvagens &eacute; muito pequena, permanecendo abaixo dos &iacute;ndices    de 60%, 50% e 40% para r&eacute;pteis, aves e mam&iacute;feros, respectivamente    (16).</font></p>     <p><font size="3">Nesse sentido, diversos pesquisadores t&ecirc;m proposto procedimentos    gerais, com vistas a qualificar e quantificar o estado sanit&aacute;rio, tanto    dos animais a serem translocados/reintroduzidos, como das popula&ccedil;&otilde;es    nativas no local de soltura. Dessa forma, trabalhos com tal abordagem foram    realizados com pandas gigantes (<i>Haleropoda melanoleuca</i>) na China (17),    com l&ecirc;mures (<i>Varecia variegata</i>) em Madagascar (18), com diversas    esp&eacute;cies nativas da Nova Zel&acirc;ndia (19), e com micos-le&otilde;es    dourados (<i>Leontopithecus rosalia</i>) (20).</font></p>     <p><font size="3">Finalmente, em 2000, a Oficina Internacional de Epizootias (OIE)    apresentou detalhados protocolos de quarentena e vigil&acirc;ncia sanit&aacute;ria    para peixes, anf&iacute;bios, r&eacute;pteis, aves e diversas fam&iacute;lias    de mam&iacute;feros, a serem adotados previamente &agrave; soltura/libera&ccedil;&atilde;o    de animais na natureza (21).</font></p>     <p><font size="3"><b>VIGIL&Acirc;NCIA E MONITORAMENTO DE PAT&Oacute;GENOS INFECIOSOS    EM ANIMAIS SELVAGENS: POR QUE FAZER?</b> A determina&ccedil;&atilde;o da incid&ecirc;ncia    e da distribui&ccedil;&atilde;o dos pat&oacute;genos, especialmente os infeciosos,    nas popula&ccedil;&otilde;es selvagens cativas e de vida livre &eacute; tarefa    urgente e priorit&aacute;ria (14). Isto se deve, principalmente, ao fato de    que a qualifica&ccedil;&atilde;o/quantifica&ccedil;&atilde;o do risco da ocorr&ecirc;ncia    de uma determinada enfermidade, e conseq&uuml;entemente de seu impacto sobre    a biodiversidade, &eacute; dependente e subordinado ao conhecimento das informa&ccedil;&otilde;es    epidemiol&oacute;gicas dos agentes m&oacute;rbidos e de suas rela&ccedil;&otilde;es    com os hospedeiros potenciais (22). </font></p>     <p><font size="3">No Brasil, em virtude de sua magn&iacute;fica biodiversidade,    e do estado delicado em que muitas esp&eacute;cies animais se encontram, &eacute;    urgente a implementa&ccedil;&atilde;o de pesquisas, al&eacute;m do apoio as    j&aacute; existentes, que investiguem a ocorr&ecirc;ncia natural de pat&oacute;genos    e suas correspondentes enfermidades. Sem esse conhecimento, trabalhos conservacionistas    importantes correm o grave risco de estarem destinados ao fracasso, seja pela    morte de animais translocados e/ou reintroduzidos, seja pela possibilidade de    induzirem desastres ecol&oacute;gicos, por meio da introdu&ccedil;&atilde;o    de doen&ccedil;as em <i>habitats</i> originalmente isentos. </font></p>     <p><font size="3">Em suma, nos nossos dias, com a constante a&ccedil;&atilde;o    antr&oacute;pica sobre o meio ambiente e a conseq&uuml;ente degrada&ccedil;&atilde;o    da natureza, a compreens&atilde;o dos processos naturais das doen&ccedil;as    nos animais, suas din&acirc;micas e impactos nas popula&ccedil;&otilde;es selvagens,    &eacute; uma ferramenta valiosa em prol da conserva&ccedil;&atilde;o de nossa    riqu&iacute;ssima biodiversidade.</font></p>     <p>&nbsp;</p>     <p><font size="3"><i><b>Jos&eacute; Luiz Cat&atilde;o-Dias</b> &eacute; m&eacute;dico    veterin&aacute;rio, professor associado de patologia comparada da Faculdade    de Medicina Veterin&aacute;ria e Zootecnia da USP, diretor t&eacute;cnico-cient&iacute;fico    da Funda&ccedil;&atilde;o Parque Zool&oacute;gico de S&atilde;o Paulo e diretor    cient&iacute;fico da Associa&ccedil;&atilde;o Brasileira de Veterin&aacute;rios    de Animais Selvagens.</i></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p><b><font size="3">Refer&ecirc;ncias Bibliogr&aacute;ficas</font></b></p>     <!-- ref --><p><font size="3">1. Valladares-P&aacute;dua, C.; Martins, C.S.; Ballou, J.D.    Popula&ccedil;&otilde;es n&uacute;cleo e cativeiro na conserva&ccedil;&atilde;o    de esp&eacute;cies amea&ccedil;adas de extin&ccedil;&atilde;o: o caso dos micos-le&otilde;es-pretos.    Anais do XXIV Congresso da Sociedade de Zool&oacute;gicos do Brasil e V Encontro    Internacional de Zool&oacute;gicos, Belo Horizonte, MG, p. 29. 2000.</font><!-- ref --><p><font size="3">2. Epiphanio, S; S&aacute;, L.R.M.; Teixeira, R.H.F.; Cat&atilde;o-Dias,    J.L. Toxoplasmosis in a wild caught black lion tamarin (Leontopithecus chrysopygus).    <i>Veterinary Record</i>, 149: 627-628. 2001.</font><!-- ref --><p><font size="3">3. Spalding, M.G; Forrester, D. Disease monitoring of free-ranging    and released wildlife. <i>Journal of Zoo and Wildlife Medicine</i>, 24: 2271-280,    1993.</font><!-- ref --><p><font size="3">4. Harvell, C.D.; Kim, K; Burkholder, J.M.; Colwell, R.R.; Epstein,    P.R.; Grimes, D.J.; Hofmann, E.E.; Lipp, E.K.; Osterhaus, A.D.M.; Overstreet,    R.M.; Porter, J.W.; Smith, G.W.; Vasta, G.R. Emerging marine diseases – climate    links and anthropogenic factors. <i>Science</i>, 285: 1505-1510, 1999.</font><!-- ref --><p><font size="3">5. Alexander, K.A.; Kat, P.W.; Munson, L.A.; Kalake, A; Appel,    M.J.G. Canine distemper-related mortality among wild dogs (Lycaon pictus) in    Chobe National Park, Botswana. <i>Journal of Zoo and Wildlife Medicine</i>,    27: 426-427, 1996.</font><!-- ref --><p><font size="3">6. Metlzer, D.G.A. 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<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Kennedy-Stoskopf]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Wild]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Report on modeling information]]></article-title>
<source><![CDATA[Proceedings of the]]></source>
<year>2000</year>
<conf-name><![CDATA[ Disease Risk Workshop]]></conf-name>
<conf-loc>Omaha Nebraska</conf-loc>
<page-range>81-88</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
