Sentence examples for more virulent type from inspiring English sources

A strain of West Nile that first appeared in Russia, Romania and elsewhere in the early 1990's is a more virulent type that is now being spread here and in Canada.

The main reason for the increased severity this season is that a more virulent type of virus, called A(H3N2), has predominated, said Dr. Dan Jernigan, deputy director of the influenza division at the disease centers.

Vaccination with the live vaccine strain (LVS), developed from a Type B strain, confers partial protection against aerosal exposure to the more virulent Type A strains and provides proof of principle that a live attenuated vaccine strain may be efficacious.

Many of the seropositive Native Americans and trappers previously surveyed in North America also did not recall clinical illness (5, 6 ), yet at least some of them were likely infected with the more virulent type A F. tularensis.

Shortly after the reports in June 2005 of the detection of C. difficile PCR ribotype 027, toxinotype III, in English hospitals, this more virulent type was detected in the Netherlands (7, 8 ).

9 The authors suggested that the increased frequency and severity of ocular disease in Brazil compared with that in Europe may be caused by more virulent type 1 and atypical strains found there.

Qiagen is developing a genotyping test that would tell the patient whether she has one of the two more virulent types of HPV that cause 70% of cancers.

Notably, a significant association was found among iceA2 allele and NUD as well as strains with more virulent types and older patients.

Genital warts are mostly caused by infection with HPV-6 or 11[4344] 44], but more virulent types of HPV (type 16 and 18) are major risk factors for cervical cancers in Chinese women [ 24, 45, 46].

Strain 1030b from the lid of patient 3 is most likely nonpathogenic and ancient while other three strains from the same patient might have evolved from 1030b into more virulent types.

In this regard, starting from the hypothesis of Boorom, more virulent and easily transmissible Blastocystis spp. may be the cause of the increase in the prevalence of IBDs in the 1990s in Europe [ 33] which indicates use of more sensitive methods such as polymerase chain reaction and culture in detection of more virulent types of this parasite.