Bemisia tabaci (Gennadius) B-biotype and Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae) often coexist on greenhouse-grown vegetable crops in northern China. The recent spread of B. tabaci B-biotype has largely replaced T. vaporariorum, and B-biotype now overlaps with T. vaporariorum where common hosts occur in most invaded areas. The impact of the B-biotype on the agro eco system...

Electrophoretic and serologic characterization of extracellular proteinases from 111 isolates (80 biotype 1 and 31 biotype 4) of Staphylococcus epidermidis (coagulase negative) of human origin were conducted. Seventy-seven (60 of biotype 1, 17 of biotype 4) of the 111 proteinase-positive isolated of S. epidermidis were classified by serological differentiation of their proteolytic enzymes with ...

Yersinia enterocolitica strain 8081, representing the high-pathogenic biotype 1B, harbours three flagellin genes arranged in tandem in the order fliC3, fliC, fliC2. The genes are organized monocistronic but coordinately expressed under the control of the flagellar sigma factor. No sequence data is available on flagellins of low-pathogenic Y. enterocolitica biotypes 2-5 and of biotype 1A strains...

OBJECTIVE To assess if Staphylococcus aureus is transmitted between man and animals & vice-versa. METHODS Staphylococcus aureus belonging to biotype C (bovine origin) were isolated from nares and hands of workers on six dairy farms of Assam and Meghalaya. The cows on the farms had a high rate of prevalence of mastitis caused by the same biotype of S. aureus. Three strains of S. aureus biotype...

Vibrio cholerae is an aquatic bacterium that causes the severe diarrheal disease cholera. V. cholerae strains of the O1 serogroup exist as two biotypes, classical and El Tor. Toxigenic strains of the El Tor biotype emerged to cause the seventh pandemic of cholera in 1961 and subsequently displaced strains of the classical biotype both in the environment and as a cause of cholera within a decade...

greenbug isolate avirulent to Wintermalt. Subsequent work by Ogecha et al. (1992) confirmed that biotype G Most biotypes of the greenbug [Schizaphis graminum (Rondani)] was less successful in feeding on Wintermalt compared are extremely damaging to barley (Hordeum vulgare L.). However, with other biotypes. When compared with biotypes E greenbug biotype G has been reported to be unable to succes...

Bemisia tabaci (Genn.) was considered a secondary pest in Brazil until 1990, despite being an efficient geminivirus vector in beans and soybean. In 1991, a new biotype, known as B. tabaci B biotype (=B. argentifolii) was detected attacking weed plants and causing phytotoxic problems in Cucurbitaceae. Nowadays, B. tabaci is considered one of the most damaging whitefly pests in agricultural syste...

One hundred Haemophilus influenzae isolates from various body sites were biotyped by conventional methods and by the API 20E system (Analytab Products, Plainview, N.Y.). By using a hemin- and a nicotinamide adenine dinucleotide-enriched saline solution as the inoculating fluid for the API 20E, a 100% correlation of results was obtained between the two methods. Ninety percent of the blood and ce...

Purpose: To evaluate the relevance of the probe test in classifying the gingival biotype and to determine if differences exist between maxillary and mandibular gingival biotypes in the same patient. Materials and Methods: 53 subjects were included. The gingival thickness was evaluated as thick or thin. This evaluation was based on the transparency of the periodontal probe through the gingival m...

Smallflower umbrella sedge is an increasingly problematic weed in direct-seeded rice in Arkansas. Recently, a sample collected from an Arkansas rice field was confirmed resistant to halosulfuron (Permit). Studies were conducted to determine the effectiveness of various acetolactate synthase (ALS)-inhibiting herbicides on control of the resistant biotype relative to a susceptible biotype and to ...