[Meningitis associated with reactivation of varicella-zoster virus].

Background: Reactivation of varicella-zostervirus (VZV) can manifest as infection of the central nervous system. The detection of VZV DNA in cerebrospinal fluid by polymerase chain reaction has extended our knowledge about the frequency of various clinical manifestations in the immunocompetent host, also without the typical rash of shingles.

Material And Methods: Over a period of three years, 1999 through 2001, we performed VZV polymerase chain reaction in cerebrospinal fluid in 364 patients with suspected infection of the central nervous system.

Rev inhibition strongly affects intracellular distribution of human immunodeficiency virus type 1 RNAs.

To define the human immunodeficiency virus type 1 (HIV-1) RNA maturation pathways, we analyzed the intracellular distribution of HIV-1 RNA and the viral regulatory proteins Rev and Tat in transfected COS cells and HIV-1-infected lymphoid C8166 cells by means of ultrastructural in situ hybridization using antisense RNA probes and immunoelectron microscopy. The intranuclear viral RNA occurs in ribonucleoprotein fibrils in the perichromatin and interchromatin regions. The simultaneous demonstration of Rev, Tat, Br-labeled RNA, and cellular proteins SC35 and CRM1 in such fibrils reveals the potential of Rev to associate with nascent HIV pre-mRNA and its splicing complex and transport machinery.

[Nucleic acid based diagnosis in clinical microbiology].

The introduction and increasing usage of nucleic acid based methods in clinical microbiology over the last years have contributed to better and earlier diagnosis of infectious diseases as well as more accurate monitoring of treatment. Various nucleic acid amplification methods such as the polymerase chain reaction and the ligase chain reaction are widely used in Norwegian clinical microbiological laboratories to detect fastidious or non-cultured infectious agents. The amplification methods combine an extremely high sensitivity with acceptable specificity.

Clinical cowpox cases in Norway.

In 1994, a human and a feline case of cowpox virus infection appeared in the western part of Norway. Cowpox has not been diagnosed with certainty in Norway since the beginning of this century, when it was associated with the use of cowpox virus as a vaccine against smallpox. The human infection manifested as a spontaneously emerged, severe ulceration at the medial angle of the right eye in a 37-y-old woman, and developed into a relatively severe dermatitis.

Characteristics of four cowpox virus isolates from Norway and Sweden.

We report the first isolation of cowpox virus from a domestic cat in Norway, and the first confirmed isolation of cowpox virus from a human case in Norway. These two Norwegian cowpox virus isolates, as well as two Swedish human isolates, were partially characterized and compared with each other and with cowpox virus Brighton and vaccinia virus strain Western Reserve. Restriction enzyme analysis of the genomes revealed differences between all six viruses examined, but suggested that the two Norwegian isolates are closely related, as are the two Swedish isolates.