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Biomedical subjects

S A Levy

Publications and source records attributed to S A Levy.

7 recordsLinked to original sources
PubMed1992

Relationship between development of antibodies to Borrelia burgdorferi in dogs and the subsequent development of limb/joint borreliosis.

The relationship between antibody production and the subsequent development of limb/joint disorders of borreliosis was examined in dogs from south central Connecticut. Dogs without signs of illness, determined by physical examination, were selected from dogs being tested for Dirofilaria immitis. An ELISA was used to detect antibodies to Borrelia burgdorferi in 234 apparently healthy dogs during 1988. These dogs were monitored for 20 months after initial analyses to determine the prevalence of limb/joint disorder in seropositive and seronegative dogs. Of 234 dogs from which samples were initially obtained, 125 had antibodies to B burgdorferi and 109 were seronegative. The development of limb/joint disorder (eg, lameness, swelling, and signs of pain) accompanied by lethargy, fever, and inappetence in each group was nearly equal. Rates of 4.8% (6/125) and 4.6% (5/109) were recorded for seropositive and serosurvey of dogs, respectively. We conclude the serosurvey of apparently healthy dogs had no predictive value for the subsequent development of limb/joint disorder.

Animals↗
PubMed1990

Tick parasitism and antibodies to Borrelia burgdorferi in cats.

Ticks were removed from naturally infested cats, and serum samples from these cats were tested for antibodies to Borrelia burgdorferi. Twenty-two of 93 cats (23.7%) had one or more motile stages of Ixodes dammini attached. Of 2 larvae and 20 nymphs removed from cats, 1 larva and 2 nymphs were infected with B burgdorferi. Spirochetes were not found in tissues of 13 female and 4 male ticks. Ten of 71 serum samples analyzed by indirect fluorescent antibody staining or ELISA contained antibodies to this spirochete. Maximal antibody titers were 1:256 and 1:2,560, respectively. At titers greater than or equal to 1:160 in ELISA, seropositivity ranged from 8.8% (n = 34 sera tested from 34 cats) in May through July to 33.3% (n = 12 cats tested) during February through April. In clinical studies of 30 cats, there were nearly equal percentages of seropositive cats with limb or joint disorders not accompanied by fever, anorexia, or fatigue (5 of 21 cats) and cats with these signs of illness but lacking lameness (2 of 9 cats.)

Animals↗
PubMed1978

Meat worker's asthma.

A meat cutter who experienced wheezing when working in the area where price labels were heated, was challenged with the inhalation of the emission of heated price labels and nebulized phthalic anhydride. Only exposure to the emissions from the heated price labels evoked a response. The spectrum of emissions from heated price labels, analyzed by gas chromatography and mass spectrometry, was found to include phthalic anhydride, 2,5-di-tert-amyl quinone and dicyclohexylphthalate.

Asthma↗
PubMedDate not supplied

Ergonomics study shows effect of full-body suit on energy use.

It stands to reason that a full-body protective suit has an impact on the worker's body. It has weight, it does restrict movement to an extent. It's not like wearing a sport shirt. But, how much of an impact and what kind; how much of an energy drain is it? This ergonomic study addresses itself to the energy expenditure from wearing such a suit. The study reveals that the energy requirements in workers undergoing light to moderate exercise do increase. In some cases, the increase may be marked, with the physiological work level going from light to moderate to heavy. This work-level jump isn't always detectable by monitoring pulse rate alone. It's also reflected by an increase in minute ventilation and oxygen consumption. One tentative conclusion coming from this study is the possibility of improving comfort and reducing the energy requirements of workers using such equipment by increasing the volume of air supplied to the suit.

Adult↗