Immune Response to Parasitic Infections

Volume: 2

The Immune Response During Toxocariosis by Toxocara Canis

Author(s): Fernando Alba-Hurtado, Lorena Chávez-Guitrón, Victor Hugo del Río- Araiza, Karen Nava-Castro and Jorge Morales-Montor

Pp: 27-50 (24)

DOI: 10.2174/9781608059850114020005

* (Excluding Mailing and Handling)

Abstract

Toxocara canis is a nematode with a biological cycle that includes a definitive canine host and diverse paratenic hosts. These hosts include humans, rats, rabbits, birds, and pigs. This parasite is the causal agent for toxocariosis, which is an important parasitic infection in tropical and subtropical regions. Infection of BALB/c mice with T. canis elicited a Th2 response; however, this infection did not significantly alter the Th1 immune response. An appropriate animal model must primarily imitate the human host, the parasite’s responses to the human host or the way that both the host and parasite interact. The knowledge of the immunological response in toxocariosis is relevant for understanding the protective mechanisms developed by the host against the parasite and the immune modulation effect on these mechanisms by the larvae. These parasite-host interactions could culminate in the success of the infection, the development of the disease, the destruction of the parasite or the interruption of its pathogenic mechanisms. This knowledge allows to design the methods of immunodiagnosis based on the detection of specific antibodies against parasite antigens and/or the detection of the parasites’ antigens. Finally, the identification of the protective immune response mechanisms could serve in the development of strategies for the prevention, treatment and more adequate management of patients. In this chapter, we review certain aspects of the immunological responses that participate in the infection and in the disease, the relevant aspects of the humoral immunological response for the design of immunodiagnostic methods and for the development of vaccines.


Keywords: Toxocariosis, Toxocara canis, helminth, nematode, worm, immunity, immune response, immunoparasitology, Th1, Th2, cytokines, drug design, immunodiagnosis, epidemiology.

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      • 13. app/Models/UserAccess/UserAccess.php:1266
      • 14. app/Http/Controllers/ChapterController.php:1518
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 16. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • (select j.user_access_id,j.volume_id,j.user_id,j.from_ip,j.to_ip,j.type,j.track,"Trial Access" as access_base_text, CASE j.type WHEN 111 THEN true ELSE false END as terms_popup, "S" as content_download_type, null as restricted_user_access_key, null as restricted_user_access_type, CASE j.track WHEN 0 THEN false ELSE true END as tracksAccessByVolume,"chapter" as access_level, j.chapter_id from `user_access_chapter_trail` as `j` inner join `user_access_info` as `info` on `j`.`user_access_id` = `info`.`user_access_id` where ((j.from_ip <= 51399716 and j.to_ip >=51399716 )) and ((j.from_date <= 1739834620 and j.to_date >= 1739834620 and j.perpetual= 0) or (j.from_date is null and j.to_date is null and j.perpetual= 1)) and j.chapter_id = 6849) union (select j.user_access_id,j.volume_id,j.user_id,j.from_ip,j.to_ip,j.type,j.track,"Subscribed" as access_base_text, false as terms_popup, "S" as content_download_type, null as restricted_user_access_key, null as restricted_user_access_type, CASE j.track WHEN 0 THEN false ELSE true END as tracksAccessByVolume,"chapter" as access_level, j.chapter_id from `user_access_chapter_corporate` as `j` inner join `user_access_info` as `info` on `j`.`user_access_id` = `info`.`user_access_id` where ((j.from_ip <= 51399716 and j.to_ip >=51399716 )) and ((j.from_date <= 1739834620 and j.to_date >= 1739834620 and j.perpetual= 0) or (j.from_date is null and j.to_date is null and j.perpetual= 1)) and j.chapter_id = 6849) union (select j.user_access_id,j.volume_id,j.user_id,j.from_ip,j.to_ip,j.type,j.track,"Token Based Access" as access_base_text, false as terms_popup, "R" as content_download_type, j.uc_id as restricted_user_access_key, "v" as restricted_user_access_type, CASE j.track WHEN 0 THEN false ELSE true END as tracksAccessByVolume,"chapter" as access_level, j.chapter_id from `user_access_chapter_token` as `j` inner join `user_access_info` as `info` on `j`.`user_access_id` = `info`.`user_access_id` where ((j.from_ip <= 51399716 and j.to_ip >=51399716 )) and ((j.from_date <= 1739834620 and j.to_date >= 1739834620 and j.perpetual= 0) or (j.from_date is null and j.to_date is null and j.perpetual= 1)) and j.chapter_id = 6849)
      550μsalphaeurekaselec_live_10_06_2022UserAccess.php#1266
      Backtrace
      • 13. app/Models/UserAccess/UserAccess.php:1266
      • 14. app/Http/Controllers/ChapterController.php:1549
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 16. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select b.banner_link, b.banner_name, b.banner_script, b.banner_remarks, b.banner_file_name, b.banner_placement, bd.content_type, bd.content_id from `tbl_banner` as `b` inner join `tbl_banner_detail` as `bd` on `bd`.`banner_id` = `b`.`banner_id` inner join `users` as `u` on `u`.`id` = `b`.`updated_by` where `b`.`banner_ebook` = 1 and `bd`.`content_type` = 'B' and `bd`.`content_id` = 1543 and `b`.`banner_from_date` <= 1739834621 and `b`.`banner_to_date` >= 1739834621 and `b`.`banner_status` = 'A' order by `b`.`banner_id` desc
      1.1msalphaeurekaselec_live_10_06_2022Banner.php#95
      Bindings
      • 0: 1
      • 1: B
      • 2: 1543
      • 3: 1739834621
      • 4: 1739834621
      • 5: A
      Backtrace
      • 13. app/Models/Banner.php:95
      • 14. app/Http/helpers.php:404
      • 17. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:124
      • 18. vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php:58
      • 19. vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php:73
    • select count(*) as aggregate from `uc_cart_products` where cart_id='cd40582b2150d48a8a658460c1d80c2a'
      220μsalphaeurekaselec_live_10_06_2022Cart.php#271
      Backtrace
      • 15. app/Models/Cart.php:271
      • 16. view::layouts._header:260
      • 18. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:124
      • 19. vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php:58
      • 20. vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php:73
    App\Models\Keywords
    14Keywords.php#?
    App\Models\Chapter
    1Chapter.php#?
    App\Models\Ebook
    1Ebook.php#?
        _token
        zsArVsQ96x6peanjLpSpbWfXRbeEg3z1jNafbREp
        uc_cart_id
        cd40582b2150d48a8a658460c1d80c2a
        _previous
        array:1 [ "url" => "https://alpha.eurekaselect.com/chapter/6849" ]
        _flash
        array:2 [ "old" => [] "new" => [] ]
        PHPDEBUGBAR_STACK_DATA
        []
        path_info
        /chapter/6849
        status_code
        200
        
        status_text
        OK
        format
        html
        content_type
        text/html; charset=UTF-8
        request_query
        []
        
        request_request
        []
        
        request_headers
        0 of 0
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        request_cookies
        0 of 0
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        response_headers
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        ClearShow all
        Date ↕MethodURLData
        #12025-02-17 23:23:41GET/chapter/68491121916