D Chilev

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[Some biochemical studies of Listeria monocytogenes strains].

PubMed (1976)

M Milanov D Chilev G Reginka Pavlina Sotirova

A total of 231 strains of Listeria organisms have been isolated during the last 14 years from adult sheep, lambs, fetuses, and ensilaged forage. Their differentiation have shown that 67 of them belong to the 1 st serotype, 77 -- to 4 c, and 26 have been determined as strains of the 5th serotype. The biochemical study on 170 of the strains have revealed that: more of them, belong to the 1 st, 4 c, and 5 th serotype break down dextrose, trehalose, levulose, salycin, esculin, ramnose, and glycerin. They do not produce hydrogen sulfide and indol, do not liquefy gelatin, and are negative for adonite and inulin. Not all prove catalase-Foges-Proskauer- and methylred--positive.

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[Atypical course of cholera in poultry].

PubMed (1979)

Tsonev Ts L Karaivanov N Shishkov M Milanov D Chilev

Atypically developing chicken septicemia was studied at 3 farms in Bulgaria. In one of the observed centers of chicken septicemia infection no pathologic anatomical changes were evident while in the other two centers of infection serofibrinose and serofibrinose vitelline peritonitis, as well as pleurisy were present. In the bacteriological investigation carried out on 2969 samples 233 strains of chicken septicemia were isolated. Identification of 84 of them by the aid of the specific bacteriophage P. multocida 115 and of sugar and alcohol fermantation revealed that they can be classified as P. multocida. They are lyzated by a phage but do not reproduce it. Chicken septicemia cultures are virulent for white mice. In intramuscular injections of pullets these cultures prove not virulent, but their intravenous application kills the pullets in 5--10 days and the initial strain is isolated from all inner organs. The biological test on pullets is suitable for determining chicken septicemia culture virulence.

Fowl cholera

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[Experimental studies on the antigenic changes in boar testis resulting from chronic brucellosis infection].

PubMed (1970)

Vulchanov A Toshkov Kakhaĭov Ir D Chilev

BOAR

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Effect of antibiotics on Brucella suis in culture and in experimentally infected guinea-pigs.

D Chilev

Brucella suis

New guinea

Streptococcus suis

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Antigenic changes in the testis of boars with chronic brucellosis.

V. H. Vulchanov A Toshkov Ivan Kehayov D Chilev

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[Streptococcosis in chickens. I. Clinical and pathomorphological studies].

PubMed (1973)

M Milanov D Chilev S Pachev

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[Streptococcosis in chickens. II. Cultural, morphological and biochemical studies of streptococcal strains].

PubMed (1976)

M Milanov D Chilev S Pachev G Reginka

Isolated were a total of 33 Streptococcus strains during two enzootics in adult and young chickens. Their cultural, morphologic, and biochemical aspects were studied in order to elucidate the biotype to which they belonged. Taking into consideration their capacity to ferment trehalose and the fact that they failed to ferment sorbite along with their beta-hemolytic activity, belonging to serologic group C, these Streptococcus cultures were determined as Streptococcus pyogenes hum. C.

Streptococcus Pyogenes

Hum

Group A

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[Antagonistic effects of monocins released by Listeria monocytogenes].

PubMed (1974)

S Cholakova Valerianov Ts D Chilev

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