a study was carried out to determine whether naturally-occurring weeds and other cultivated plants in tomato growing regions could act as symptomless reservoirs of infection to fusarium oxysporum f. sp. lycopersici. a numher of f. oxysporum isolates from weeds and oubergines were used in this investigation. a susceptible tomato cultivar was used for comparison. the plants were artificially ...

Abstract Avocado sunblotch viroid (ASBVd) is found in many avocado-growing regions of the world, where it affects fruit yield and quality. The trees develop two types infections: symptomatic symptomless infections. Symptoms are most obvious as yellow streaks on leaves, green stems carrier do not display any such symptoms. Symptomless considered primary source disease transmission orchards. Henc...

Symptomless dysphasia is one of the main causes of pneumonia in elderly people with stroke, and swallowing or the cough reflex can prevent aspiration pneumonia.1 The article by Nakayama and colleagues (May 1998),2 concerning angiotensin-converting enzyme (ACE) inhibitors and the swallowing reflex, was a fascinating and timely study. We previously reported that ACE inhibitors may cure symptomles...

The diagnostic value of skin tests was assessed in 35 patients affected by bird breeder's disease by comparing the results with those obtained in a group of 27 symptomless breeders and 10 symptomless unexposed individuals. Sterilised and diluted serum and lyophilised extracts of faeces prepared from the breeder's own birds were injected intradermally. Skinprick tests using the same materials we...

Symptomless dysphasia is one of the main causes of pneumonia in elderly people with stroke, and swallowing or the cough reflex can prevent aspiration pneumonia.1 The article by Nakayama and colleagues (May 1998),2 concerning angiotensin-converting enzyme (ACE) inhibitors and the swallowing reflex, was a fascinating and timely study. We previously reported that ACE inhibitors may cure symptomles...

The role of Grapevine Pinot gris virus (GPGV) in the etiology of grapevine leaf mottling and deformation was investigated by biological and molecular assays. A survey on different cultivars from the Trentino Region in Italy showed a widespread distribution of GPGV, which was associated with symptomatic (79%) but also with symptomless (21%) vines. Symptomatic and GPGV-infected 'Pinot gris' vines...