FIV and Kidney Disease in Cats

a href="http://www.ncbi.nlm.nih.gov/pubmed/20151865?itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSumordinalpos=27"White JD, Malik R, Norris JM, Malikides N. Association between naturally occurring chronic kidney disease and feline immunodeficiency virus infection status in cats. J Am Vet Med Assoc. Feb 15 2010;236(4):424-429./abr / br / Chronic kidney disease (CKD) is well known in older cats. In most cases, the underlying cause is never identified. CKD appears more common in young male cats and feline immunodeficiency virus (FIV) is also common in these cats, raising the question of whether the two are related. To investigate a potential association between chronic kidney disease and FIV in cats in Australia, a case-control study was designed. The study included 73 cats with CKD and 69 cats with no evidence of CKD. All cats were tested for FIV antibodies and information on age, breed and gender was gathered. The cats were divided into two age groups - under 11 years old and over 11 years old. Statistical analysis was performed to investigate any relationship between CKD and FIV, and with the other variables. Among cats under 11 years old, those with CKD were significantly more likely to be infected with FIV than cats without CKD. It was not possible to determine if infection with FIV occurred before the cats developed CKD. The role of FIV in the development of CKD disease requires further research. [SL]br / br / bRelated articles:/bbr / a href="http://www.ncbi.nlm.nih.gov/pubmed/16821485?itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSumordinalpos=2"White JD, Norris JM, Baral RM, Malik R. Naturally-occurring chronic renal disease in Australian cats: a prospective study of 184 cases. Aust Vet J. Jun 2006;84(6):188-194./abr / br / a href="http://www.ncbi.nlm.nih.gov/pubmed/17409007?itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSumordinalpos=5"Norris JM, Bell ET, Hales L, et al. Prevalence of feline immunodeficiency virus infection in domesticated and feral cats in eastern Australia. J Feline Med Surg. Aug 2007;9(4):300-308./abr / br / More on cat health: a href="http://www.winnfelinehealth.org/Health.html"Winn Feline Foundation Library/abr / a href="http://www.facebook.com/WinnFelineFoundation"Join us on Facebook/abr / a href="http://www.twitter.com/WinnFeline"Follow us on Twitter/abr / New for 2010: a href="http://winnfelinehealth.us1.list-manage.com/subscribe?u=415b3f2ea14ea9e3390df93aaid=cb095b8233"subscribe to our e-newsletter/adiv class="blogger-post-footer"Providing expert cat health information and supporting cat health research since 1968.img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/1170470470666539402-525274476678157505?l=winnfelinehealth.blogspot.com' alt='' //divdiv class="feedflare" a href="http://feeds.feedburner.com/~ff/CatHealthNewsFromTheWinnFelineFoundation?a=GenSK2PIiIc:9YWBrNupbw0:yIl2AUoC8zA"img src="http://feeds.feedburner.com/~ff/CatHealthNewsFromTheWinnFelineFoundation?d=yIl2AUoC8zA" border="0"/img/a a href="http://feeds.feedburner.com/~ff/CatHealthNewsFromTheWinnFelineFoundation?a=GenSK2PIiIc:9YWBrNupbw0:UT3xtbGYFzA"img src="http://feeds.feedburner.com/~ff/CatHealthNewsFromTheWinnFelineFoundation?d=UT3xtbGYFzA" border="0"/img/a a href="http://feeds.feedburner.com/~ff/CatHealthNewsFromTheWinnFelineFoundation?a=GenSK2PIiIc:9YWBrNupbw0:qj6IDK7rITs"img src="http://feeds.feedburner.com/~ff/CatHealthNewsFromTheWinnFelineFoundation?d=qj6IDK7rITs" border="0"/img/a a href="http://feeds.feedburner.com/~ff/CatHealthNewsFromTheWinnFelineFoundation?a=GenSK2PIiIc:9YWBrNupbw0:F7zBnMyn0Lo"img src="http://feeds.feedburner.com/~ff/CatHealthNewsFromTheWinnFelineFoundation?i=GenSK2PIiIc:9YWBrNupbw0:F7zBnMyn0Lo" border="0"/img/a a href="http://feeds.feedburner.com/~ff/CatHealthNewsFromTheWinnFelineFoundation?a=GenSK2PIiIc:9YWBrNupbw0:V_sGLiPBpWU"img src="http://feeds.feedburner.com/~ff/CatHealthNewsFromTheWinnFelineFoundation?i=GenSK2PIiIc:9YWBrNupbw0:V_sGLiPBpWU" border="0"/img/a a href="http://feeds.feedburner.com/~ff/CatHealthNewsFromTheWinnFelineFoundation?a=GenSK2PIiIc:9YWBrNupbw0:oCFASsrFxfc"img src="http://feeds.feedburner.com/~ff/CatHealthNewsFromTheWinnFelineFoundation?d=oCFASsrFxfc" border="0"/img/a /divimg src="http://feeds.feedburner.com/~r/CatHealthNewsFromTheWinnFelineFoundation/~4/GenSK2PIiIc" height="1" width="1"/

Predictors of Feline Kidney Disease

Jepson, R. E., D. Brodbelt, et al. (2009). "Evaluation of predictors of the development of azotemia in cats." J Vet Intern Med 23(4): 806-13.

Chronic kidney disease (CKD) often afflicts geriatric cats, with prevalence rates of 15% reported. The important factors for development of CKD that could be monitored in cats are not known, and were investigated by these researchers. They followed healthy geriatric cats for 12 months (exams every six months), measuring various clinical parameters and correlated these with development of kidney disease. The study evaluated 118 client-owned cats with an average age of 13 years. All were neutered. Physical exams, blood pressure measurement, and blood and urine analyses were done on all cats. Thirty percent of the cats enrolled developed evidence of kidney disease (azotemia) during the study. Of the parameters measured, only two – increased levels of creatinine (including high normal levels) in the blood and detectable protein in the urine – correlated with development of kidney disease (as evidenced by azotemia). The authors concluded that measurement of protein in the urine is an inexpensive and easy way to monitor aging cats for development of CKD. [MK]
>> PubMed Abstract

Related articles:
King JN, Tasker S, Gunn-Moore DA, Strehlau G; BENRIC (benazepril in renal
insufficiency in cats) Study Group. Prognostic factors in cats with chronic kidney disease. J Vet Intern Med. 2007 Sep-Oct;21(5):906-16.
>> PubMed Abstract

Boyd LM, Langston C, Thompson K, Zivin K, Imanishi M. Survival in cats with
naturally occurring chronic kidney disease (2000-2002). J Vet Intern Med. 2008 Sep-Oct;22(5):1111-7.
>> PubMed Abstract

More on cat health: Winn Feline Foundation Library
Join us on Facebook

Evaluation of Kidney Function in Cats

Heiene, R., B. S. Reynolds, et al. (2009). "Estimation of glomerular filtration rate via 2- and 4-sample plasma clearance of iohexol and creatinine in clinically normal cats." American Journal of Veterinary Research 70(2): 176-185.

Large numbers of elderly cats develop renal disease. Survival time after diagnosis is variable. The ability to estimate glomerular filtration rate (GFR) could lead to early detection of renal disease and allow earlier institution of therapeutic measures that protect renal function. GFR is considered the overall best indicator of renal function in healthy and diseased animals and is estimated by measurement of clearance of a marker substance. This study used 51 cats to compare 2 methods for estimating GFR, evaluate the effect of ages and body size and their interaction on GFR estimates, and establish reference ranges for GFR in clinically normal cats. The two contrast markers evaluated were iohexol and creatinine. No adverse drug reactions were noted with the use of iohexol for GFR estimation. GFR values were established in all the cats in the study. A difference in estimated GFR between young and old cats was not evident in this study. The study did find a small but significant effect of body size on estimated GFR and this was more important than the effect of age. The 4-sample method was a convenient and reliable means to establish GFR in cats with values considered normal or near normal. The 2-sample method also provided acceptable approximations for GFR and worked well in non-sedated cats. However, the 4-sample method is more accurate in cats with low renal function. Since body weight should be taken into account for estimating GFR, further studies are indicated to provide more information. [VT]
>> PubMed Abstract

Related articles:
van Hoek, I., H. P. Lefebvre, et al. (2008). "Plasma clearance of exogenous creatinine, exo-iohexol, and endo-iohexol in hyperthyroid cats before and after treatment with radioiodine." J Vet Intern Med 22(4): 879-885.
>> PubMed Abstract

van Hoek, I., E. Vandermeulen, et al. (2007). "Comparison and reproducibility of plasma clearance of exogenous creatinine, exo-iohexol, endo-iohexol, and 51Cr-EDTA in young adult and aged healthy cats." J Vet Intern Med 21(5): 950-8.
>> PubMed Abstract

More on cat health: Winn Feline Foundation Library

Survival of Cats with Kidney Disease

Boyd, L. M., C. Langston, et al. (2008). "Survival in Cats with Naturally Occurring Chronic Kidney Disease (2000-2002)." Journal of Veterinary Internal Medicine 22(5): 1111-1117.

Up to 20% of cats will be affected with chronic kidney disease (CKD) during their lifetime. The prevalence of CKD increases with age, so that almost 1/3 of cats over the age of 15 years are affected. The disease has unpredictable progression and variable presentation, making it difficult to perform long-term survival studies. The International Renal Interest Society (IRIS) has developed a classification scheme for CKD in dogs and cats that is often used in long-term studies. The purpose of this study was to determine the average survival time for a large populatoin of cats from a facility that sees both first and second opinion cases, and to determine if the IRIS stage at diagnosis and after correction of pre-renal azotemia are associated with survival time. The study population consisted of 211 client-owned cats enrolled between April 2000 and January 2002. Clinical characteristics, clinicopathologic data, and survival times were extracted from the medical records. Kaplan-Meier survival curves were performed to determine survival times. Median survival for cats in IRIS stage IIb at the time of diagnosis was 1,151 days, and was longer than survival in stage III (median 778 days) or stage IV (median 103 days). The researchers conclude that IRIS stage of CKD based on serum creatinine at the time of diagnosis is strongly predictive of survival in cats with naturally occurring CKD.
>> PubMed Abstract

Related articles:
Syme, H. M., P. J. Markwell, et al. (2006). "Survival of cats with naturally occurring chronic renal failure is related to severity of proteinuria." J Vet Intern Med 20(3): 528-35.
>> PubMed Abstract

Elliott, J., J. M. Rawlings, et al. (2000). "Survival of cats with naturally occurring chronic renal failure: effect of dietary management." J Small Anim Pract 41(6): 235-42.
>> PubMed Abstract

More on cat health: Winn Feline Foundation Library