Feeding of irradiated chicken, beef, and pineapple jam to dogs.
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IgE against the spices coriander and/or curry, mace, celery, and white pepper was measured in 150 sera from patients with suspected food allergies. Fifteen percent of the 288 spice RASTs resulted in greater than or equal to 10% binding of 125I-labeled anti-IgE. Twelve sera were studied in detail. In most sera IgE against various spices was present; all 12 sera contained IgE against mugwort-pollen extract. In RAST-inhibition experiments with three different sera, a cross-reactivity between mugwort pollen and coriander could be demonstrated. Leukocytes from two patients released histamine on incubation with spice extracts. This study suggests that IgE against various spices may play a role in some adverse reactions to food.
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A survey was undertaken to determine the incidence and numbers of L. monocytogenes in a variety of meat products (cooked meat products, raw cured meat products (dried or not), mayonnaise based salads and prepared meals). As expected, raw cured meat products were significantly higher contaminated with L. monocytogenes than cooked meat products, 13.71% (113/824) and 4.90% (167/3405), respectively. Also a larger proportion of raw cured meat product samples contained a high initial level of the pathogen ( > 10 cfu/g). Higher incidence rates were obtained for whole cooked meat products (e.g. cooked ham, bacon) after slicing than before slicing, 6.65 and 1.56%, respectively, indicating cross-contamination. Due to multiple handling and processing steps, the incidence rate of the pathogen was higher for cooked minced meat products than for whole cooked meat products, 6.14 and 3.96%, respectively. No significant differences were obtained in the incidence of L. monocytogenes in whole cured meat products (e.g., raw ham) and minced cured meat products (e.g., dry fermented sausage), 14.92 and 11.69%, respectively. Lower incidence rates of L. monocytogenes were obtained for raw, cured meat products using beef or horse meat, 4.65 and 5.88%, respectively, A high incidence rate of L. monocytogenes was noted for the mayonnaise based salads (21.28% (186/874)) as well as for prepared meals (11.70% (92/786)), the latter especially due to contamination of vegetarian meals.
Forty-one marketed samples of imported and domestic glass bottled foods were tested for clostridia contamination. It was detected in nine (22%) samples. Clostridia were isolated from fish sauce (Nam pla, Nuoc-mam), dressing, mustard, hot and sour soup mix (Tom Yum), mysids boiled down in soy, and salmon flakes. The origin of all clostridia positive samples was Asia. Clostridium botulinum and C. perfringens were not detected. The frequency of occurrence was higher by enrichment broth culture detection methods than by agar plate or pouch methods. These findings suggest that the number of bacteria in most of these clostridia positive food samples is very low, and the use of enrichment methods for detection of clostridia is essential.
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Painting and feeding of mice with 2mg of an extract from black pepper on 3 days a week for 3 months results in a significant increase of the number of tumor-bearing mice. Tumor incidence is reduced in those groups of experimental animals receiving 5 or 10mg Vitamin A-palmitate twice weekly for 3 months by feeding or painting during and subsequent to application of pepper extract. Feeding of mice with powder of black pepper in diet (50g/3kg food) has no impact on carcinogenesis.
Mutagenicity screening was carried out on 31 samples of popular Thai spices derived from 12 different families of plants, namely the Amaryllidaceae (2), Graminae (1), Labiatae (4), Lauraceae (1), Magnoliaceae (1), Myristicaceae (2), Myrtaceae (2), Piperaceae (3), Rutaceae (2), Solanaceae (2), Umbelliferae (2) and Zingiberaceae (9). Two variations of the rapid streak method of rec-assay in Bacillus subtilis strains H17 (rec+) and M45 (rec-) were used. Only Ceylon cinnamon (the bark of Cinnamomum zeylanicum Nees of the family Lauraceae) showed mutagenic activity. The crude form of this spice and its water-heated and water-macerated residues all produced the rec effect, while water-heated and water-macerated filtrates did not, even in concentrations equivalent to as much as 50 mg solids/test disc.
A cytological study was carried out on root tips of Nigella sativa L. by treatment with Mitomycin C at 0.001% for six time intervals (10, 15, 20, 30, 40, and 50 min). The chromosomal abnormalities were increasingly proportionate to the increase in time of treatment. The seedlings treated with a 0.001% concentration of Mitomycin C for 10 min. did not show any significant effect. At other time intervals, the effect was observed to be quite significant. Beyond 40 min. treatment almost all the cells would become sticky. Thirty minutes' treatment showed significant effect, inducing various types of chromosomal aberrations in the anaphase, such as bridges and fragments of 34.13% and 48.07%, respectively.
Fennel, Foeniculum vulgare, and anise, Pimpinella anisum, are plants which have been used as estrogenic agents for millennia. Specifically, they have been reputed to increase milk secretion, promote menstruation, facilitate birth, alleviate the symptoms of the male climacteric, and increase libido. In the 1930s, some interest was shown in these plants in the development of synthetic estrogens. The main constituent of the essential oils of fennel and anise, anethole, has been considered to be the active estrogenic agent. However, further research suggests that the actual pharmacologically active agents are polymers of anethole, such as dianethole and photoanethole.
In order to investigate the effect of the nasopulmonary reflex on the regulation of airway resistance, the nasal mucosa was stimulated with white pepper powder and the change in airway resistance was evaluated in 13 totally laryngectomized patients and 39 normal subjects. The results were then analyzed to clarify whether there was any difference in the pattern of the change in airway resistance between the two groups. In totally laryngectomized patients, airway resistance often diminished significantly after stimulation. In normal subjects, on the other hand, a significant increase in airway resistance was often observed. The above results suggest that stimulation of the mucosa of the upper airway causes dilation of the trachea and bronchi accompanied by a decrease in airway resistance in laryngectomized patients. The stimulation presumably dilates the trachea and bronchi in normal subjects as well, but the effect of the dilation appears to be overpowered by the constriction of the larynx and, as a result, an increase in airway resistance is observed. 4