Dawb, fluffy fur, thiab striking xiav ob lub qhov muag-miv thiab kittens nrog cov xim sib xyaw ua ke yog undoubtedly zoo nkauj, thiab tej zaum koj hooked lub sij hawm koj nteg ob lub qhov muag rau lawv. Tab sis koj puas paubmuaj qhov teeb meem kev noj qab haus huv zais cia cuam tshuam nrog qhov txawv txav no?
Peb mam li tham txog kev lag ntseg hauv lub cev, ib yam kab mob uas ua rau tsis hnov lus ntawm cov miv dawb, xiav-eyed miv. Peb tseem yuav hais txog kev lag ntseg ntau, nrog rau kuaj mob, kho, thiab tiv thaiv tus mob. Cia peb mus.
Dab tsi yog Congenital Sensorineural Deafness?
Congenital sensorineural lag ntseg (CSD) yog ib yam mob uas paub zoo uas cuam tshuam rau cov miv dawb, xiav-eyed uas tau kawm txij li xyoo 19th xyoo pua. Tus mob no yog keeb kwm, txhais tau hais tias nws yog txiav txim los ntawm caj ces, thiab tej zaum yuav dhau los ntawm niam txiv mus rau cov xeeb ntxwv. CSD tshwj xeeb cuam tshuam rau miv uas muaj autosomal dominant pigment gene W. Kev lag ntseg hauv cov miv cuam tshuam tuaj yeem yog ib sab (cuam tshuam rau ib pob ntseg) lossis ob sab (cuam tshuam rau ob lub pob ntseg).
CSD tshwm sim li cas?
Nyob rau hauv miv nrog cov tseem ceeb W pigment noob, daim tawv nqaij dawb, plaub hau, thiab xiav ob lub qhov muag tshwm sim los ntawm melanocyte (pigment-tsim cell) suppression. Yog hais tias W gene ua tau zoo, nws kuj suppresses melanocytes hauv stria vascularis (ib feem ntawm cochlea), uas ua rau strial degeneration thiab cochlear plaub hau poob hauv pob ntseg. Qhov no thaum kawg ua rau cochleosaccular neuronal degeneration thiab lag ntseg tom qab uas tshwm sim kwv yees li 1-3 lub lis piam tom qab yug me nyuam.
Puas yog Tag Nrho Cov Miv Dawb Nrog Lub Qhov Muag xiav cuam tshuam?
Thaum lag ntseg feem ntau pom hauv cov miv dawb nrog lub qhov muag xiav, tsis yog txhua tus miv uas muaj xim tshwj xeeb no yuav raug cuam tshuam. Los ntawm cov kev tshawb fawb ntawm cov miv dawb sib xyaw, cov hauv qab no feem ntau ntawm kev lag ntseg tau sau tseg:
- Kwv yees li 65%–85% ntawm miv dawb nrog ob lub qhov muag xiav yog lag ntseg
- kwv yees li 39%–40% ntawm cov miv dawb nrog ib lub qhov muag xiav yog lag ntseg
- Kwv yees li 17%–22% ntawm cov miv dawb uas tsis muaj qhov muag xiav yog lag ntseg
Kev tshawb fawb tsis ntev los no ntawm cov kittens purebred hauv tebchaws United Kingdom pom cov hauv qab no hais txog qhov muaj ntau ntawm CSD:
- 50% ntawm cov miv dawb nrog ob lub qhov muag xiav yog lag ntseg
- kwv yees li 44% ntawm cov miv dawb uas muaj ib lub qhov muag xiav yog lag ntseg
- Kwv yees li 22% ntawm cov miv dawb uas tsis muaj qhov muag xiav yog lag ntseg
Txoj kev tshawb no kuj tau sau tseg qhov sib txawv ntawm qhov sib txawv tshwj xeeb ntawm CSD. Qhov tshwm sim ntawm kev lag ntseg tau pom tias muaj ntau dua (ntau dua 40%) hauv cov khoom dawb Norwegian Forest, Maine Coon, thiab Turkish Vankedisi kittens, thiab qis dua (tsawg dua 17%) hauv Lavxias, Persian, thiab Devon Rex kittens.
Yuav Ua Li Cas Yog Kev Lag Luam Hauv Miv?
Kev lag ntseg yuav nyuaj rau kev kuaj mob hauv cov menyuam mos, lossis hauv cov miv khaws cia hauv pab pawg, vim tias cov tsiaj txhu no feem ntau yuav ua raws li lwm tus hauv lawv pawg. Txhawm rau ntsuas kev lag ntseg, tus menyuam miv yuav tsum tau soj ntsuam ib tus zuj zus, tom qab 3-4 lub lis piam ntawm hnub nyoog, thaum cov lus teb rau lub suab yuav ua tau ntau dua. Cov cim hauv qab no yuav qhia tau tias koj tus menyuam miv lossis miv tuaj yeem cuam tshuam los ntawm kev hnov lus tsis hnov lus:
- Nyob tau yooj yim startled
- Nyob hauv suab nrov
- Tsis teb rau lub suab sab nraum lawv qhov pom kev thaum sawv ntxov
Yog tias koj muaj kev txhawj xeeb tias koj tus miv dawb, xiav-eyed feline yuav lag ntseg, mus ntsib koj tus kws kho tsiaj. Lawv yuav ua qhov kev ntsuam xyuas thiab saib xyuas koj tus miv cov lus teb rau ntau lub suab stimuli hauv chav kuaj. Thaum qhov no tuaj yeem muab lub tswv yim dav dav ntawm koj tus miv lub peev xwm hnov, txoj kev ntseeg siab tshaj plaws ntawm kev kuaj mob lag ntseg yog nrog lub hlwb auditory evoked teb (BAER) kuaj ntawm lub chaw xa mus. BAER kev tshuaj ntsuam xyuas yog qhov tsis muaj kev cuam tshuam, kuaj electro-diagnostic uas tuaj yeem siv los kuaj CSD hauv cov miv uas muaj hnub nyoog tshaj 20 hnub.
Kev kho rau CSD
Tshwj xeeb tsis muaj kev kho mob zoo rau kev mob caj dab, kev lag ntseg hauv cov miv. Txawm hais tias kev lag ntseg sensorineural tsis tuaj yeem thim rov qab, muaj txiaj ntsig zoo tsis muaj pov thawj tias cov lag ntseg lag ntseg raug kev tsis xis nyob lossis mob los ntawm tus mob. Ntau tus miv cuam tshuam los ntawm kev lag ntseg tseem muaj peev xwm ua neej nyob puv, lub neej ntev.
Kev Tiv Thaiv CSD
Tam sim no, tsis muaj kev kuaj DNA los txheeb xyuas cov neeg muaj caj ces ntawm kev lag ntseg hauv miv. Txhawm rau txo qhov tshwm sim ntawm tus kab mob no, BAER kev sim thiab xaiv kev yug me nyuam yuav tsum tau txiav txim siab rau cov miv uas feem ntau cuam tshuam phenotypes.
Hauv cov ntsiab lus, txawm tias tsis yog txhua tus miv xiav-eyed dawb yog lag ntseg, lag ntseg feem ntau tau sau tseg hauv miv nrog cov yam ntxwv ntawm lub cev - thiab yog ib qho tshwm sim uas tau sau tseg rau ntau pua xyoo. Txawm hais tias kev tiv thaiv thiab kev kho mob tsis muaj qhov txwv tsis pub, cov felines tseem tuaj yeem muaj kev zoo siab, noj qab nyob zoo, thiab koom nrog koj tsev neeg.
