Jai Krishen Nayar

jkn@ifas.ufl.edu

(100% Research)

Education

• B.Sc.(Honors)., University of Delhi, Delhi, India. Zoology, 1954.
• M.Sc., University of Delhi, Delhi, India, India. Zoology & Entomology. 1956.
• Ph.D., University of Illinois, Urbana, IL. USA. Entomology, 1962.

Employment

• Professor, (1983-present) University of Florida.
• Entomologist IV, (1979-1983) University of Florida.
• Entomologist III & IV, (1963-1979) State of Florida, Department of Health and Rehabilitative Services, Florida Medical Entomology Laboratory, Vero Beach, FL.

Research Responsibilities

To conduct basic and applied research on insects of medical and veterinary importance.

Specific responsibilities are:

1. To study the natural histories of mosquitoes and sandflies of Florida.
2. To investigate the biology and biological regulation of arthropod transmitted diseases with special emphasis on the genetic, biochemical and bionomics aspects of disease carrying insects.
   

Accomplishments

• I have conducted extensive laboratory and field studies on the biology and bionomics of several Florida mosquitoes of medical and veterinary importance.
• During the last few years, I have worked extensively on the physiochemical mechanisms which control susceptibility and refractoriness of Florida mosquitoes to malarial and filarial parasites. At present I am working on mosquito immunity to filarial and malarial parasites.

Grants and Contracts (Total of $ 6000,000 over last 15 years from International, national, State and Commercial sources)

Career Publications

• Bulletins: 2
• Refereed papers: 160+
• Chapters in books: 1
• Miscellaneous papers: 20

Selected publications

• Nayar, J. K. and D. M. Sauerman, Jr. 1974. Circadian rhythms in Florida mosquitoes. IN Chronobiology: Proceedings of the International Society of Biological Rhythms. Editors: L.E. Scheving et al. Igaku Shoin, Ltd., Tokyo. pp. 1607-611.
  
• Nayar, J. K. 1982. "Bionomics and Physiology of Culex nigripalpus (Diptera: Culicidae) of Florida. An Important Vector of Diseases." Technical Bulletin No. 827. IFAS, University of Florida, Gainesville, Fla 73 p.
  
• Nayar, J. K., Editor. 1985. "Bionomics and Physiology of Aedes taeniorhynchus and Aedes sollicitans, the salt marsh mosquitoes of Florida." Technical Bulletin No. 852. IFAS, University of Florida, Gainesville, Fla. 148 p.
  
• Nayar, J. K. 1981. Aedes aegypti L. (Diptera: Culicidae) a vector of dengue: Observations on dispersal, survival, insemination, ovarian development and oviposition characteristics of a Florida population. Jour. Florida Anti-Mosquito Assoc. 52: 24-40.
  
• Nayar, J. K. 1982. Wyeomyia mitchellii: Observations on dispersal, survival, nutrition, insemination and ovarian development in a Florida population. Mosquito News 42: 416-427.
  
• Nayar, J. K. and D. M. Sauerman, Jr. 1975. Physiological basis of host susceptibility of Florida mosquitoes to Dirofilaria immitis. Jour. of Insect Physiol. 21: 1965-1975.
  
• Sauerman, D. M. and J. K. Nayar. 1985. Characterization of refractoriness in Aedes aegypti to infection by Dirofilaria immitis. Jour. Med. Entomol. 22: 94-101.
  
• Sauerman, D. M. and J. K. Nayar. 1985. Prevalence of presumed Dirofilaria tenuis microfilariae in Raccoons near Vero Beach, Florida. J. Parasitol. 71: 130-132.
  
• Bradley, T. J. and J. K. Nayar. 1985. Intracellular melanization of the larvae of Dirofilaria immitis in the Malpighian tubules the mosquito, Aedes sollicitans. J. Inverteb. Pathol. 45: 339-345.
  
• Nayar, J. K. and D. J. Forrester. 1985. Susceptibility of Culex nigripalpus to several isolates of Plasmodium hermani from wild turkeys in Florida. Jour. Amer. Mosquito Control Assoc. 1: 253-255.
  
• Ali, A. and J. K. Nayar. 1985. Activity of an Avermectin insecticide, Abamectin (MK-936), against mosquitoes and chironomid midges in the laboratory. Jour. Amer. Mosquito Control Assoc. 1: 384-386.
• Ali, A. and J. K. Nayar. 1986. Efficacy of Bacillus sphaericus Neide against larval mosquitoes (Diptera: Culicidae) and midges (Diptera: Chironomidae) in the laboratory. Florida Entomologist 69: 685-690.
  
• Nayar, J. K., L. Rosen and J. W. Knight. 1986. Experimental vertical transmission of St. Louis encephalitis virus by Florida mosquitoes. Amer. Jour. Trop. Med. Hyg. 35: 1296-1301.
  
• Forrester, D. J., J. K. Nayar and M. D. Young. 1987. Natural infection of Plasmodium hermani in the Northern Bobwhite, Colinus virginianus (L.). J. Parasitol. 73: 865-866.
  
• Ali, A. and J. K. Nayar. 1987. Laboratory toxicity of a new Benzoylphenylurea Insect Growth Regulator (UC-84572) against mosquitoes and chironomid midges. Jour. Amer. Mosquito Control Assoc. 3: 309-311.
  
• Bradley, T. J. and J. K. Nayar. 1987. An ultrastructural study of Dirofilaria immitis infection in the Malpighian tubules of Anopheles quadrimaculatus. J. Parasitol. 73: 1035-1043.
  
• Nayar, J. K. and T. J. Bradley. 1987. Effects of infection with Dirofilaria immitis on diuresis and oocyte development in Aedes taeniorhynchus and Anopheles quadrimaculatus (Diptera: Culicidae). Jour. Med. Entomol. 24: 617-622.
  
• Penneys, N. S., J. K. Nayar, H. Bernstein and J. W. Knight. 1987. Circulating antibody detection in human serum to mosquito salivary gland proteins by the Avidin- Biotin-peroxidase technique. Jour. Amer. Academy of Dermatol. 18: 87-92.
  
• Nayar, J. K., J. W. Knight and T. J. Bradley. 1988. Further characterization of refractoriness in Aedes aegypti (L.) to infection by Dirofilaria immitis (Leidy). Expertl. Parasitol. 66: 124-131.
  
• Nayar, J. K., J. W. Knight and A. C. Vickery. 1989. Intracellular melanization in the mosquito Anopheles uadrimaculatus (Diptera: Culicidae) Say against the filarial nematodes, Brugia sp. (Nematoda: Filarioidea). Jour. Med. Entomol. 26: 159-166.
  
• Penneys, J. S., J. K. Nayar, H. Bernstein and J. W. Knight. 1989. A chronic pruritic eruption in patients with AIDS associated with increased antibody titers to mosquito salivary gland antigens. Jour. Amer. Academy Dermatol. 21: 421-425.
  
• Penneys, N. S., J. K. Nayar, H. Bernstein, J. W. Knight and C. Leonardi. 1989. Mosquito salivary gland antigens identified by circulating human antibodies. Archives of Dermatology 125: 219-222.
  
• Mahmood, F. and J. K. Nayar. 1989. Effects of Dirofilaria immitis (Nematoda: Filarioidea) infection on life table characteristics of susceptible and refractory strains of Aedes aegypti (Vero Beach) (Diptera: Culicidae). Florida Entomologist 72: 567-578.
  
• Mahmood, F. and J. K. Nayar. 1989. Effect of Dirofilaria immitis (Nematoda: Filarioidea) infection rate of diuresis in susceptible and refractory strains of Aedes aegypti (Vero Beach) (Diptera: Culicidae). Florida Entomologist 72: 579-585.
  
• Nayar, J. K., J. W. Knight and A. C. Vickery. 1990. Susceptibility of Anopheles quadrimaculatus (Diptera: Culicidae) to subperiodic Brugia malayi and Brugia pahangi (Nematoda: Filarioidea) adapted to nude mice and jirds. Jour. Med. Entomol. 27: 409-411.
  
• Bradley, T. J., J. K. Nayar and J. W. Knight. 1990. Selection of a strain of Aedes aegypti susceptible to Dirofilaria immitis and lacking intracellular concretions in the Malpighian tubules. J. Insect Physiol. 36: 709-717.
  
• Nayar, J. K., C. G. Crowder and J. W. Knight. 1991. In vitro development of Brugia pahangi and Brugia malayi in cultured mosquito thoraces. Acta Tropica 48: 173-184.
  
• Nayar, J. K. and J. W. Knight. 1991. Nutritional factors and antimicrobials on development of infective larvae of subperiodic Brugia malayi (Nematoda: Filarioidea) in Anopheles quadrimaculatus and Aedes aegypti (Diptera: Culicidae). J. Med. Entomol. 28: 275-279.
  
• Nayar, J. K., Gunawardana and J. W. Knight. 1991. Effects of medium alterations on in vitro development of Brugia malayi larvae in cultured mosquito thoraces. J. Parasitol. 77: 572-579.
  
• Nayar, J. K., J. W. Knight, P. E. Kaiser, J. A. Seawright and S. K. Narang. 1992. Comparative susceptibility of species A, B, and C of Anopheles quadrimaculatus complex to infection with subperiodic Brugia malayi and Brugia pahangi (Nematoda: Filarioidea). Jour. Am. Mosq. Control Assoc. 8: 61-64.
  
• Nayar, J. K., L. L. Mikarts, J. W. Knight and T. J. Bradley. 1992. Characterization of intracelullar melanization response in Anopheles quadrimaculatus against subperiodic Brugia malayi larvae. J. Parasitol. 78: 876-880.
  
• Nayar, J. K., T. J. Bradley, L. L. Mikarts and J. W. Knight. 1993. Intracellular development of subperiodic Brugia malayi influenced by mosquito thoracic muscles. J. Inverteb. Pathol. 62: 90-94.
  
• Chikilian, M. L., T. J. Bradley, J. K. Nayar, and J. W. Knight. 1994. Ultrastructural comparison of extracellular and intracellular encapsulation of Brugia malayi in Anopheles quadrimaculatus. J. Parasitol. 80: 133-140.
  
• Nayar, J. K. and T. J. Bradley. 1994. Comparative study of hemolymph phenoloxidase activity in Aedes aegypti and Anopheles quadrimaculatus and its role in encapsulation of Brugia malayi microfilariae. Comp. Biochem. Physiol. 109A: 929-938.
  
• Nayar, J. K. and J. W. Knight. 1994(1995). A new approach to vector control: Immunity in mosquito vectors of parasites. Jour. FL. Mosq. Control Assoc. 65: 61- 64.
  
• Chikilian, M. L., T. J. Bradley, J. K. Nayar, C. E. Cash-Clark, and J. W. Knight. 1995. Ultrastructure of the intracellular melanization of Brugia malayi (Buckley) (Nematoda: Filarioidea) in the thoracic muscles of Anopheles quadrimaculatus (Diptera: Culicidae). Internatl. J. Morph. & Embryol. 24: 83-92.
  
• Nayar, J. K. and J. W. Knight. 1995. Wounding increases intracellular encapsulation (Melanization) of developing Brugia malayi (Nematoda: Filarioidea) larvae in thoracic muscles of Anopheles quadrimaculatus. Comp. Biochem. Physiol. 112A: 553-557.
  
• Nayar, J. K. and J. W. Knight. 1995. Comparison of migration and encapsulation of Brugia malayi microfilariae from the midgut to the hemocoel between Anopheles quadrimaculatus and Aedes aegypti. J. Invertebr. Pathol. 65: 295-299.
  
• Nayar, J. K., L. L. Mikarts, M. L. Chikilian, J. W. Knight and T. J. Bradley. 1995. Lectin binding to extracellularly melanized microfilariae of Brugia malayi from the hemocoel of Anopheles quadrimaculatus. J. Invertebr. Pathol. 66: 277-286.
  
• Ali, A., J. K. Nayar, and Rui-de Xue. 1995. Comparative toxicity of selected larvicides and insect growth regulators to a Florida laboratory population of Aedes albopictus. J. Amer. Mosq. Control Assoc. 11: 72-76.
  
• Nayar, J. K. and J. W. Knight. 1996 . Cytochemical localization of lectin-binding to intracellularly melanized first stage larvae of Brugia malayi ( Buckley) (Nematoda:Filarioidea) in Anopheles quadrimaculatus (Say) (Diptera: Culicidae). Int. J. Insect Morphol. & Embroyl. 25:331-339.
  
• Nayar, J. K. and J. W. Knight. 1997. Hemagglutinins in Anopheles quadrimaculatus, strains susceptible and refractory to Brugia malayi and their role in the immune response to filarial parasites. Comp. Biochem. Physiol. 116B:109-117.
• Ali, A. J. K. Nayar and W-D. Gu. 1998. Toxicity of a Phenyl pyrazole insecticide, Fipronil, to mosquito and chironomid midge larvae in the laboratory. J. Am. Mosq. Control Assoc. 14:216-218 .
• Ali, A. and J. K. Nayar. 1998. Introduction, colonization, medical significance and control possibilities of Aedes albopictus in the USA. Rev. Col. Med. Epoca III.8: 18-20
• Nayar, J. K., J. W. Knight, A. Ali, D. B. Carlson, and P. D. O'Bryan.1999. Laboratory evaluation of biotic and abiotic factors that may influence larvicidal activity of Bacillus thuringiensis servor. israelensis against two Florida mosquito species. J. Am. Mosq. Control Assoc. 15: 32-42.
• Knight, J. W. and J. K. Nayar. 1999. Colonization of Culex nigripalpus Theobald (Diptera: Culicidae) by stimulation of mating using males of other mosquito species. J. Am. Mosq. Control Assoc. 15: 72-73.
• Nayar, J. K. and J. W. Knight. 1999. Aedes albopictus (Diptera: Culicidae): an experimental and a natural host of Dirofilaria immitis (Dog Heartworm) in Florida. J. Med. Entomol. 36: 441-448.
• Nayar, J. K., N. Karabatsos, J. W. Knight, M. Godsey, J. Chang and C. J. Mitchell. 2001. Mosquito hosts of arboviruses from Indian River County, Florida, during 1998. Fla. Entomol. 84: 376-379.
• Nayar, J. K., A. Ali and M. Zaim. 2002. Effectiveness and residual activity comparison of granular formulations of insect growth regulators Pyriproxyfen and s-methoprene against Florida mosquitoes in laboratory and outdoor conditions. J. Amer. Mosq. Control Assoc. 18: 196-201.
• Nayar, J. K., J. W. Knight and L. E. Muntermann. 2002. Temporal and geographic genetic variation in Culex nigripalpus Theobald (Diptera: Culicidae), a vector of St. Louis encephalitis, from Florida. J. Med. Entomol. 39: 854-860.
• Nayar, J. K. and J. W. Knight. 2002. Isoenzyme variation in Aedes aegypti correlated with Dirofilaria immitis infectability. Med.& Vet. Entomol.16: 424-429.
• Provost, M. W. (Late), and J. K. Nayar. 2002. Index to Florida mosquito and sandfly references in Florida Medical Entomology Laboratory (FMEL) publications. http://fmel.ifas.ufl.edu/

Revised March 2003